alaska cruise october weather

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Alaska Cruise Weather by Month

Alaska Cruise Temperature by Month

Whether soaking up the golden sun on a fishing expedition or feeling the crisp breeze as you zipline through picturesque landscapes, you may notice that on an Alaska cruise , weather can vary greatly month-to-month. Princess cruise itineraries travel to the Southeast and Inside Passage regions of Alaska from May through September when wildlife is bustling, greenery is flourishing and salmon are running. Temperatures can reach anywhere from the low 30s to upper 80s depending on your month of travel as well as the port of call. We always recommend that you dress in layers to prepare for whatever weather comes your way. To help you get ready for your awe-inspiring adventure, learn about Alaska cruise temperatures by month.

Alaska Cruise Weather in May

After spending the winter in warmer climates, humpback whales migrate north and break the waters of the Inside Passage, marking the dawn of Alaska’s most vivacious season. Hundreds of king salmon grace the majestic waters of the Pacific while freckled lynx bask in the early summer sun. Thanks to the modest daytime temperatures and refreshing evening climates, May is peak season for many of Alaska’s most cherished wildlife. Weather typically ranges from the 30s to a high of around 55 degrees Fahrenheit. May itineraries invite guests to pack sweaters and jackets for easy layering.

Alaska Cruise Weather in June

Feel the warm embrace of the summer sun throughout June when the Land of the Midnight Sun experiences the height of its daylight. With over 18 hours of golden sun each day, Alaska landscapes kiss the snowy surfaces goodbye and welcome the lush green meadows that bear the fruits of winter’s labor. With newly dried surfaces, hiking expeditions commence. As you venture into the depths of Alaska’s wilderness, reach new heights where you can enjoy unparalleled views of staggering glaciers and roaming hillside wildlife. With lows in the upper 40s and highs in the mid-60s, allow the revitalizing, crisp breeze to tickle your neck as you rejoice in the unforgettable climb.

Alaska Cruise Weather in July

As temperatures continue to rise, relish in the warmest month of the year when Alaska’s wildlife comes out to play. In Icy Strait Point, find regal brown grizzly bears roaming through streams in search of fresh salmon. Or, look for lively humpback whales making a splash off the coast of Juneau. As you embark on your summer adventure, bring light jackets for hiking through shady regions as well as plenty of sunscreen for basking in 18 hours of glorious sunlight each day this month.

Alaska Cruise Weather in August

Cast your line into the marvels of an Alaska summer by cruising in August. As you sail into each port of call, delight your taste buds in the delicacies of Alaska’s waters. Donning subtle notes of the sea, the silver salmon is one of the most sought-after fish and just so happens to be most fruitful this time of year. Whether or not fishing is your forte, be sure to pack water-resistant apparel for every splash and sprinkle that may arise from kayaking down crystalline fjords and hiking through misty rainforests. With lows in the upper 40s and highs of around 60, you’ll feel refreshed and eager to explore the captivating wonders of Alaska.

Alaska Cruise Weather in September

As September begins, the sun dips below the horizon signifying the inauguration of fall. The lush green forests transition into vibrant hues of gold and saffron while the mountaintops become freckled in snowfall. Daylight quietly recedes and the growing twilight perfectly contrasts the luminous green lights of the Aurora Borealis . The enchanting colors invite you to marvel at the miracles of Mother Nature that so often act as the inspiration for treasured postcards. With only 12 hours of sunlight, temperatures range from around 43 degrees to the mid-50s. These new, cooler climates encourage Alaska’s famed wildlife to begin preparing for hibernation. Gaze at the water’s surface as thousands of bald eagles congregate to enjoy the final salmon of the season.

Best Month to Take an Alaska Cruise

What is the best weather for an Alaska cruise? Temperatures can vary anywhere between 30 to 80 degrees throughout the summer travel months – inviting guests to layer on the sweaters and windbreakers as weather can be unpredictable. So, the best month to travel to the Great Land depends on what you want to do. For the fishing aficionado, consider May when king salmon reach their greatest appearance. If you prefer to explore the lush scenery by foot, wait until June when the sun has overcome the frosty terrain of the Inside Passage and trails are primed for adventures. Regardless of which month you choose to explore Alaska, you’ll encounter iconic marine life and embark on heart-stirring adventures when you set sail with Princess.

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What is it like Cruising to Alaska in October?

by Prof. Cruise · Published February 6, 2024 · Updated February 7, 2024

Cruising to Alaska in October: Introduction and Background

Those who follow me via my blog or on social media know that I cruise to Alaska frequently, both because Alaska owns significant real estate in my heart and also because I live within walking distance of the two cruise terminals in Seattle, so I regularly take advantage of last minute Alaska cruise deals. I’ve cruised there dozens and dozens of times (including from San Francisco for my honeymoon several years before moving to Seattle and from Vancouver a handful of times) on almost every line and itinerary and throughout the season. Speaking of which, I’ve watched over the past few years as the Seattle to Alaska cruise season has gradually gotten longer, now starting in early April and extending through late October. And, let me tell you, I’m HERE FOR IT! It’s always a sad day when the last cruise ship sails away for the season. I live in a high rise apartment in downtown Seattle, so I can literally see it sailing away and have been known to shed tears while drowning my sorrows in a chocolate martini (my favorite cruise drink).

Anyway, last year I decided to hop on the very last Alaska cruise of the season in late October to experience what it’s like to cruise to Alaska so late into the fall (my prior latest season cruise was in September). I also followed closely the other October Alaska cruises, both to have an idea of what I might expect, but also for research purposes knowing I was going to publish an article about October Alaska cruising. I had a good friend onboard the cruise just prior to mine, so she provided me with a lot of detail about her experience (I ended up getting really lucky on a number of fronts with my cruise while, sadly, she had a much different experience.).

So, based on both my own experience and extensive research, here are 12 things you can expect on a cruise to Alaska in October. I’ll start with 5 advantages to cruising in October before moving on to some (possibly) problematic things to consider before you decide to book an October itinerary.

12 Things you can Expect on a Cruise to Alaska in October

1: prices will be much lower and solo supplements may be waived.

For a 10-night Alaska sailing including Glacier Bay and long stays in every port (all this to say it was a very desirable itinerary), I paid less for my cruise in October than it costs for hotel room for one night and a dinner out in Seattle. And I paid NO solo supplement. Honestly, I think I ate more than my cruise fare in ice cream alone.

Looking at current prices for 2024, a 7-night Alaska itinerary on the Encore or Bliss will run you from around $1300-$1600 per person for an inside cabin in July (that’s the cruise fare only, not including taxes and extra packages). In October the same itineraries and cabins are currently listed for $600-$700 and prices are likely to drop even lower closer to the sail date. There’s even a 9-night itinerary in October on the Jewel listed for just $497 (interior, per person)!

2: Almost no kids will be onboard

Are you one of those people who says, “I looooove kids, buuuuuuut I prefer vacationing without them? No shame, I hear you! Even though I have my own kid and cruise with him frequently, I relish my relaxing solo cruises, booked intentionally during times with few kids onboard (because the whole point of a solo cruise is to have a BREAK from kids).

So, what’s the kid situation on an Alaska cruise in October? Having grown up in Utah, the average family in my neighborhood had more children than the total under 18 population of my October Alaska cruise, and 90% of them were under five (still adorable and not running wild and painting the walls with ice cream).

3: You may see the Northern Lights

Prior to this cruise I had three remaining items on my bucket list: (1) make out with Justin in his Honda accord; (2) see the Northern Lights; (3) see penguins on ice. Number one is currently the only item remaining even though I really should have crossed it off the list twenty years ago when Honda Accords stopped being cool and Justin phoned to tell me he’s gay. I crossed number three off this January on a cruise to Antarctica. And I crossed number two off on my October cruise to Alaska!

Seeing the Northern Lights is only a real possibility on the last cruises of the season in late September and October. Be sure to download an app or join a Facebook group that tracks the aurora forecast and shares current information, so you know when you need to head outside (usually in the middle of the night) to look. Some ships will also have a sign-up at Guest Services where they will call you in the event of any activity. Be sure to also connect with the naturalist onboard your cruise ship. They’ll be on the lookout too and will share any information they have with you. Good luck! Be sure to share pics with me if you’re lucky enough to catch it!

As a bonus, there’s another fascinating natural phenomenon you’ll have a shot at seeing on an October Alaska cruise: “hair ice.” While I’d crossed hair ice off my hiking bingo card a few years prior near Seattle, it was exciting to see it again on a hike in Ketchikan during my late October cruise. The conditions required for the formation of hair ice are extremely specific: rotting wood from a broadleaf tree, the presence of a certain fungus, moist air, a temperature slightly below 32°F, and latitudes between 45°N and 55°N.

4: Ports will be far less crowded

No port visit to Skagway is complete without greeting some of the town’s many ghosts (and I mean many, it’s rumored that every building has at least one), the most famous being Lydia of the Red Onion Saloon. But normally during the peak of the cruise season, you’ll be visiting said ghosts with about 40,000 fellow cruise ship passengers. Ports, including Skagway, will be PACKED full of tourists in June, July, and August. But not in October. Upon disembarking your ship, you may find yourself saying, “man, this place is like a ghost town!” And not for the reason I stated earlier. You’ll almost feel like you have the towns all to yourself and will have a much less chaotic and more authentic Alaska experience (you’ll experience the port towns much more like the locals do in the off-season). Here’s what downtown Skagway looked like during my October visit:

And this was Juneau from the top of the tram with only ONE ship in port (normally there are at least five).

5: There will be end of season sales at local shops

Fancy some half off ice cream in Skagway where, with the windchill, it feels like it’s -15°F? You’re in luck! But seriously, many of the shops that remain open (see #7 below), will have great end-of-season sales where you can pick up souvenirs or local foods to try.

6: Many shops and restaurants will closed and fewer tours offered

However (and here’s where we’ll start getting into the potentially negative aspects of cruising to Alaska in October), many shops and restaurants will be closed in October and fewer tours will be offered. Why? Because many of them are staffed with seasonal employees who have already returned home (many back to college). I’d estimate about half of the shops and (touristy) restaurants were closed during my October sailing.

7: Weather will be a crapshoot

Weather at port in Alaska even during the peak of the cruise season can vary greatly and be unpredictable, especially over the last several years (which have trended warmer). However, it’s useful to look at average high and low temperatures and rainfall totals by port to get a sense of what you’re more likely to experience. Here’s what those look like for October:

Average Temperature and Rainfall by Alaska Port for October

As for me, I got extremely lucky! I didn’t experience a single drop of rain and skies ranged from partly cloudy to full sun. The temperature was chilly at some ports and downright cold (especially in Skagway with the wind) at others. Overall, it was way (WAY) better than I expected for that time of year and I was able to hike at every port. However, remember the friend I mentioned who was on the cruise just prior to mine? She had terrible weather, so bad that her ship had to be completely rerouted to avoid a serious storm and one port was missed entirely. See, a crapshoot!

8: Rough seas are a possibility

Just like the weather, sea conditions are also unpredictable in October. Again, I lucked out on my sailing with calm waters, but my friend experienced swells of up to 20 feet (she reported that even crew members were sick).

9: You’ll have fewer cruise lines and ships to choose from

Below you’ll find the October 2024 cruises that dock in Alaska. You’ll note that a handful of these are extended sailings onboard Oceania’s Regatta, not dedicated Alaska sailings. And ALL the others are on NCL. If you don’t like NCL, you’re out of luck for October.

10: There may be scaled back Alaska programming onboard

The most disappointing aspect of my October cruise was the lack of park rangers onboard during our day spent sailing through Glacier Bay National Park. Normally 2-4 park rangers board the ship to provide highly enriching commentary and programming, to stamp your national park passport book, and to offer educational resources and souvenir merchandise. By the time our cruise ship arrived in late October, their season was already over. I’d been to Glacier Bay many times before, but I felt really bad for those who hadn’t (including a fellow cruiser and national park aficionado I met hiking who booked this itinerary specifically to get his national park passport stamped).

11: You’ll experience less daylight

During my October sailing, it was fully light from around 7:45am until around 5:30pm. Great if you want to sleep in a bit and still catch a sunrise or watch the sunset on a nice pre-dinner walk around the promenade deck (which I did almost every day). But I also missed out on the incredible views arriving to or departing from most ports, because it was completely dark (that may not be as much of an issue depending on your particular itinerary – many of the NCL itineraries depart from Alaska ports quite early).

12: Fewer opportunities for wildlife viewing

Hoping to see whales on your cruise to Alaska? An Alaska cruise is one of the best places to see humpback whales as over 500 of them (the type you’re most likely to see on an Alaskan cruise) begin arriving back in southeast Alaska, to feed in the rich waters of the inside passage, from their winter homes in Mexico, Hawaii, and Asia around April and stay through most of the cruise season. However, they start making their way back to warmer waters from late September to early October, so you’ll see far fewer whales on an October cruise (you may still see some though – I did).

What about salmon and bears? The best time to see salmon spawning on an Alaskan cruise is typically between mid-July and mid-September.  However, the unusual heat over the past few seasons moved that timeline up some. In October you’ll smell salmon (corpses, rotting along river banks), but the salmon run will be long over. It should also come as no surprise that the best time to see bears at port in Alaska coincides with the salmon run as they feed on salmon near the mouths of streams and rivers. It’s possible you’ll still see them in October (as evidenced by the sign I saw displayed on the forest trail in Icy Strait Point about 10 feet from my cruise ship in October), but far less likely.

Would I Cruise to Alaska in October Again?

I cruise to Alaska so many times every year that I’ve started telling people I summer there. Well, after the experience I had on my first October cruise, I might starting “fall-ing” there too (I’m already watching prices for the Norwegian Jewel’s October Alaska itineraries and will jump on one when they drop low enough)! However, if Alaska is a one-time bucket list itinerary for you, I’d avoid October (you might get lucky like I did, but the odds are against it). And, if I’m being totally candid, I’d avoid NCL. If I only had one shot at Alaska, I’d go in July (maybe August) on either Holland America or Princess on an itinerary that includes Glacier Bay. I love NCL and have cruised more days on the line than any other (including many cruises to Alaska on the Bliss, Encore, Spirit, and Sun), but the line remains my least favorite for Alaska (terrible docking location in Ketchikan, short times at port for many itineraries, and no special Alaska-themed meals or beverages onboard).

Who should cruise to Alaska in October? I think these October cruises are perfect for someone (like me) located on the West Coast looking for a cheap, and I mean CHEAP, cruise in October with low expectations regarding the weather and ports. If that sounds like you, maybe I’ll catch you onboard (because I plan on doing it every year from now on)! And with that…

Class Dismissed!

Be sure to check out some of my additional Alaska and Seattle cruise content here:

Homework (10 points) : Share any questions you may still have about cruising to Alaska in October to the comments. Or if you’ve cruised to Alaska in October before, please share your experience and tips so we can learn from each other.

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We were on the same cruise as the Professor and totally agree with everything she said.

Last time to Alaska was about 15 years ago and being old, could not remember anything about that trip except it was a cruise. One of the big draws for us was the price, much less than mid season prices, so we could afford a balcony cabin and very few children.

The one tip i would add is dress warm and in layers. Living in Phoenix where we define “cold” as anything under 70 and “I can’t feel my toes anymore” as temperatures under 50, we were not completely equipped for the temperatures.

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About Prof. Cruise

Given name Sarah, but also answers to Prof. Cruise. Retired after 10 years as a college professor to focus full-time on her primary research interest: travel. With a concentration in cruising.  Home port: Seattle.  Mom of a shaggy-haired dog and a shaggy-haired human.  Lover of books and dessert.  Fancies herself a bit of a comedian – you’ve been warned.

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You’re not alone if you’re worried about how cold it gets in Alaska or which month is best to avoid the rain. The weather in Alaska is unpredictable and can change at a moment’s notice.

It’s not uncommon to wake up to a hot sunny day, only to find it cold and raining 10 minutes later.

We’ve put together this Alaska cruise weather guide to help you find the best time to cruise to Alaska .

Table of Contents

Alaska Cruise Weather by Month

The Alaska cruise season generally runs from May to September, with occasional cruises in April and October.

The below chart shows the Alaska cruise temperatures you can expect on the inside passage, along with rainfall and hours of daylight:

Alaska Cruise Weather in May

• Highs : 55°F
• Lows : 40°F
• Average Rainfall : 3.48 inches
• Hours of Daylight : 16.5 hours of daylight

Many cruise ships begin their summer deployments to Alaska in May before peak season begins in June.

The Alaska cruise weather in June is fairly cool, but it has the least amount of rainfall during the Alaska cruise season. You can expect Alaska cruise temperatures in May to have lows of around 40 and highs of around 55 degrees Fahrenheit.

May is one of the best times to visit Alaska for dry weather, fewer crowds, and lots of wildlife.

During May, you’ll find several whale species along Alaska’s inside passage. By this time of the year, most of the whales will have completed their migration from the warm waters of Mexico to Alaska, where they will spend the summer.

Spring is also the time to spot newborn wildlife.

You can expect to see lots of snow-capped mountains, and there are fewer insects and mosquitos.

Alaska Cruise Weather in June

• Highs : 60°F
• Lows : 45°F
• Average Rainfall : 3.36 inches
• Hours of Daylight : 18.1 hours of daylight

Early June is when the Alaska cruise season kicks into high gear. The warming weather allows cruise ships to travel through the Arctic waters providing unique opportunities for passengers.

The Alaska cruise temperature is warmer in June, with lows of 45 and highs in the low 60 degrees Fahrenheit. Make sure to pack insect repellant when you visit Alaska in June, as mosquitos and other insects can become a nuisance.

The warm weather makes it one of the best times to witness the calving of glaciers.

You can expect 18-20 hours of daylight in June, providing lots of time to enjoy the Alaskan wilderness and abundant wildlife.

June is one of the best months for wildlife sightings, with caribou, black bears, mountain goats, moose calves, and even polar bears out and about.

Alaska Cruise Weather in July

• Highs : 65°F
• Lows : 50°F
• Average Rainfall : 4.14 inches
• Hours of Daylight : 17.3 hours of daylight

July is the peak season for Alaska cruises and provides the best Alaska cruise weather and wildlife opportunities. This month has some of the warmest weather, longest daylight hours, and the largest number of tourists.

Temperatures in July average from the high 40s to 65 degrees Fahrenheit.

The warm weather and long hours of sunlight mean you’ll want to pack sunglasses and sunscreen. You should still wear layers when visiting the port, but if you’re planning active shore excursions like hikes or glacier walks, you’ll want to stick with lightweight clothing.

July is an ideal month to visit for salmon fishing, cultural festivals, bear viewing, and small-town exploring. With the popularity of July cruising, cruise prices are at their highest.

Despite having the best weather, Alaska’s weather in July is very unpredictable. You’ll want to pack for all kinds of weather and wear a lightweight rain jacket.

Alaska Cruise Weather in August

• Average Rainfall : 5.37 inches
• Hours of Daylight : 15.2 hours of daylight

August is when the Alaska cruise season begins to wind down. During this month, you can expect the weather begins to cool, higher rainfall, and gorgeous fall landscapes.

You may be able to find some deals towards mid-August, but expect full fares for the most part.

The chance of rain during this month is over 50%, so you’ll want to pack plenty of waterproof gear – including waterproof shoes and wool socks.

Alaska Cruise Weather in September

• Average Rainfall : 7.54 inches
• Hours of Daylight : 12.4 hours of daylight

As school returns to session, cruise prices dip and provide travelers with last-minute bargains to take an Alaskan cruise.

The temperatures in September are slightly cooler, with highs of 55 and lows around 40 degrees fair height. September is also the rainiest month of the cruise season. So be prepared to pack lots of rain gear.

September also sees fewer crowds than in the summer. However, the shoulder season has become more prevalent in recent years, making great deals harder to find. Knowing when to book your cruise can help you save money on your trip.

Due to the shorter daylight hours, September provides the best opportunity to see the Aurora Borealis from an Alaskan cruise.

Fun Alaska Weather Facts

• The coldest recorded temperature in Alaska is -79.8° F (-62° C) at Prospect Creek on January 23, 1971. It also holds the record as the coldest recorded temperature in the United States
• The hottest recorded temperature in Alaska is 100° F (38° C). The temperature was recorded on June 27, 1905, in Fort Yukon
• Juneau, Alaska, is the cloudiest place in the US, with only a 30% chance of seeing the sun.
• 1952-1953 set the record for most snowfall in a year with 971.5 inches of snow.
• Yakutat, Alaska, holds the record as the rainiest place in the US, with an annual rainfall of 160 inches each year.
• Southeast Alaska is home to the Tongass National Forest, the largest temperate rainforest in the world.

Final Thoughts

Alaska cruise weather is unpredictable. The weather conditions can change several times throughout the day, which is why it’s best to pack plenty of layers and a lightweight raincoat.

The best time to cruise Alaska for good weather is between late June and early July. The summer months have the warmest temperatures and the least amount of snowfall.

Not to mention you’ll have a better chance of seeing humpback whales, king salmon, bears, moose, and bald eagles.

• Climate for Juneau, Alaska . Climate in Juneau, Alaska. (n.d.). Retrieved November 4, 2022, from https://www.rssweather.com/climate/Alaska/Juneau/
• Alaska Weather & Climate: Temperature Chart, daylight & more . ALASKA.ORG. (n.d.). Retrieved November 4, 2022, from https://www.alaska.org/expert-advice/weather-climate
• Alaska Weather . Travel Alaska. (n.d.). Retrieved November 4, 2022, from https://www.travelalaska.com/Plan-your-Trip/Planning-Tools/Alaska-Weather
• Amazing Alaska Facts – A Land of Extremes . AlaskaKids. (n.d.). Retrieved November 4, 2022, from http://www.alaskakids.org/index.cfm/know-alaska/Alaska-Quick-Facts/Land-of-Extremes

Marcello De Lio

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The best time to cruise Alaska

Alaska is a cruise destination with a limited season. Cruise ships arrive in southeast Alaska in spring, stay the summer and linger only into early fall. The 49th state's snowy, cold and dark winters are not conducive to cruising.

Most cruise passengers will head to Alaska between Memorial Day in late May and Labor Day in early September when temperatures range from slightly chilly to warm during the long daylight hours. Tourist attractions are in full swing, salmon swim upriver and bears (and humans) have access to fishing.

Some adventurous cruisers will board ships when they arrive in Alaska in April to see the remnants of winter. A few big ships cruise into mid-October for those who want a peek at what life is like in Alaska towns when all the other tourists have returned home.

For cruise news, reviews and tips, sign up for TPG's cruise newsletter .

Each month has its advantages, not the least of which is discounted pricing in the spring and fall shoulder seasons. Here is a guide to help you decide when to cruise in Alaska.

After a long winter, Alaska begins to wake up in April, and that includes the wildlife. Small-ship cruise lines such as Lindblad Expeditions and UnCruise Adventures have sailings into the wilderness, where you might spot bears emerging from their slumber and admire huge waterfalls fueled by the snowmelt. A few big ships, such as the 4,000-passenger Norwegian Bliss out of Seattle, begin their season this month with discounted early season pricing.

You may encounter freezing rain or even snow on your April cruise and should expect to tread through mud. Some tourist facilities — including those at national parks — may still be shuttered for the winter.

On the other hand, you will have the opportunity to observe the change of seasons. Expect crisp mornings with temperatures in the 30s, though by the end of the month, you may find dry weather and temperatures in the 60s. As an added bonus: The skies will be dark at night; if clear, you might spot the northern lights.

Related: The best Alaska cruise for every type of traveler

As someone who has cruised Alaska many times, I love cruising in May when the weather is dry and locals are emerging from their winter cocoons, embracing the sunshine. The wildlife is doing the same, and you might spot bears with their cubs, moose with their calves and humpback whales returning from their winter home in Hawaii.

Big-ship cruise lines such as Holland America Line , Princess Cruises and Royal Caribbean ramp up their operations in May, as do Disney Cruise Line and small-ship and luxury lines. Early season deals might be available.

Attractions and shops will switch to peak-season hours at the end of the month; Denali National Park & Preserve switches into summer mode in May. You'll find those who work in tourism excited to be back in business, considering that many people in southeast Alaska earn their income from out-of-state visitors. Cruise lines will offer the opportunity to extend your cruise with land tours, which include accommodations, transportation and some meals.

While early May often carries a chill in the air, by the end of the month, you might encounter temperatures in the 60s. The warmer weather means glaciers begin shedding ice more frequently, so you have a better chance of experiencing the sight and sound of a house-size chunk of ice calving into the sea. There's also the bonus that Alaska's large mosquito population has yet to emerge.

Related: Alaska cruise guide: Best itineraries, planning tips and things to do

The cruise season beefs up in June, with the number of ships growing and the season in full swing by the end of the month. The midnight sun means many hours of daylight, especially on June 20, the longest day of the year — when you'll have to stay up late to see any darkness at all.

Early in June, the ships are still mostly carrying adults, with the family crowd — including multigenerational groups — arriving later in the month.

Shore excursion experiences abound. Temperatures are pleasant — in the 60s and sometimes higher, with wildflowers in bloom and glaciers calving. Anglers will find opportunities to reel in halibut along with king and sockeye salmon and rainbow trout. In addition to humpbacks, you might also spot belugas and seals with their pups as you sail.

At the beginning of the month, you might still be able to find some early season pricing; the peak season for Alaska cruising begins in late June.

Related: Alaska cruise packing list: What to pack for a sailing up north

July and August

Summer is the height of the Alaska cruise season, which means crowds in port towns, especially when several ships are in port at the same time. You might have to wait hours for a table at Tracy's King Crab Shack in Juneau.

It might surprise many, but July and especially August are rainy, so don't expect endless sunshine. That said, you are in Alaska at a time for festivals and other special events, and frontier towns really come alive.

Temperatures will be in the 60s, sometimes higher — you might even see 80s in Juneau in July. During long days of light, you'll find hearty Alaskans swimming in the sea and enjoying water sports. Shore excursion options will be in full swing.

During both months, you will encounter peak-season pricing. Unless you booked early, cabin choice could be limited — especially if you are looking for a fancy suite or cheap inside cabin, which tend to be the first categories to sell out. Balcony cabins are particularly popular in Alaska.

Mosquitos enjoy the summer, too, so pack bug spray. July and August are also spawning season for salmon, so you might spot grizzlies and brown bears near rivers and streams.

Keep an eye out for seabirds and songbirds, seals, Steller sea lions and humpback whales. Marine life is so prolific that some small-boat shore excursions guarantee you will see animals. Bears will be fishing; in late August, they will be looking for blueberries, which also become a featured item on restaurant menus. Toward the end of August, you'll see leaves changing to fall colors.

Related: Best Alaska cruise shore excursions — from heli-hiking to whale watching

The beginning of September is much like August, but after the kids go back to school and the family crowd departs, it's shoulder season for cruising and pricing drops. Most cruise ships will have repositioned out of the state by the end of the month. You will experience a change of season, with cooler temperatures (in the 50s or lower) and some rain.

Mid-to-late September is one of the best times to spot wildlife in Alaska. I have had extraordinary experiences, such as watching a pod of humpback whales gather together in bubble-net feeding (corralling fish in a "net" of bubbles) to fill their bellies in preparation for their annual journey to warmer waters. Bears will be hunting for the last of the berries and salmon, and caribou, deer and moose will be mating.

You'll see colorful fall foliage but not mosquitos. National park facilities and some tourist businesses will switch to winter hours. September is also a great time to get deals on souvenirs, as merchants sell off this year's goods at the end of Alaska's tourist season.

On clear nights, you could have a chance to spot the northern lights — though they won't shine as brightly as they do in winter. Rather than stay up all night, see if your ship or pre- or post-cruise hotel has a sign-up sheet for people who want a wake-up call should the lights appear.

Related: From Alaska to the Panama Canal: Here are 9 of TPG's favorite fall cruise itineraries

A limited number of cruises in October (predominantly on Norwegian Cruise Line ) make it possible for cruisers to experience a taste of Alaska in winter without sub-zero temperatures. You will want to bundle up; the average temperature in Juneau in October is 39 degrees. Days will be short — there are only about 10 hours of daylight. You are likely to experience rain and maybe snow.

Some attractions and shops will be closed for winter, though your cruise line will still operate a full roster of shore excursions. On the plus side, you will experience southeast Alaska towns as they are most of the year, sans tourist crowds. Sit in a bar and talk to the locals as they prepare for the long winter ahead. Cruise fares will be discounted.

Related: Caribbean vs. Alaska cruises: Which itinerary will I like more?

Bottom line

Alaska is a thrilling cruise destination no matter which month you sail. Look to the early and late sailings of the season if you are a bargain seeker. Choose a May or June sailing for drier weather and fewer mosquitos; summer is the best time to cruise to see abundant marine life and birds. September can be a great month to see wildlife.

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