Alaska Cruise Packing List by Month: What to Pack for May–September
What to pack for an Alaska cruise in May, June, July, August and September, with temperature ranges, rain by month and the layers that work, so you stay warm on glacier day without overpacking.
Last updated: October 2, 2026 :: Written by Sue Nelson, Travel Advisor | Adventures by MJ
Quick Answer: Pack layers for every Alaska cruise: a waterproof jacket, a fleece or down layer, long sleeves and waterproof walking shoes. Add gloves, a beanie and thermals for May and September, sunscreen for June and July, and waterproof pants for August and September.
Key Takeaways: Alaska Cruise Packing by Month
Layers win every month. Summer highs in Juneau are around 60°F, according to the Alaska Climate Research Center, and it feels colder on deck near the ice.
May and September are the coolest months of the season. Pack gloves, a beanie and an insulated waterproof jacket.
June and July are the mildest. June brings the longest days, with more than 18 hours of daylight in Juneau around the solstice.
August and September are the wettest. Bring a real rain jacket and waterproof pants, not just water-resistant gear.
Waterproof walking shoes are the one item you will use every single day.
Planning an Alaska cruise? Then you absolutely need an Alaska cruise packing list by month, because what works in sunny July might leave you shivering dramatically in May. Alaska cruise season runs from late spring through early fall, and the weather changes faster than cruise buffet options.
Here’s the deal: packing for Alaska is not like packing for the Caribbean. You are not packing bikinis and vibes. You are packing layers. Waterproof gear. Sensible shoes. And a humble respect for coastal weather that can go from “Oh how lovely” to “Where is my jacket?” in 20 minutes.
Alaska cruise weather typically ranges from the mid-40s to upper 60s depending on the month. May and September bring cooler temperatures and fewer crowds. June and July offer milder weather and long daylight hours (like, “Why is it still bright at 10pm?” long). August is beautiful, but often rainier. Knowing what to pack for an Alaska cruise depends entirely on when you sail.
And let me just say: excellent life choice. Glaciers the size of skyscrapers. Bald eagles flying overhead like they own the place. Whales breaching beside the ship. And yes, that one enthusiastic passenger recreating Titanic on the top deck… except he’s bundled in three layers and holding hot cocoa instead of heartbreak.
Of all the cruises I’ve taken (and there have been many), Alaska ranks in my top two vacations ever. But what makes or breaks this trip isn’t just the itinerary, it’s preparation. The right layers, waterproof shoes, and smart packing choices will keep you comfortable whether you’re glacier viewing, exploring Alaska cruise ports, or heading out on shore excursions.
Because Alaska cruise weather changes by month, and your suitcase needs to keep up.
September: 45–60°F (cooler, fewer tourists, possible Northern Lights)
Translation: it’s never exactly hot… and it’s always layer season.
Alaska Cruise Routes: Why the Inside Passage Matters
Most Alaska cruises sail through the Inside Passage, known for calmer waters, glacier viewing, and wildlife sightings. If your itinerary includes Glacier Bay, Juneau, Ketchikan, or Skagway, packing for rain and layering is especially important. Glacier Bay alone is a full day on deck: ships typically spend 9 to 10 hours in the park, according to the National Park Service.
Month
Avg Temp (°F)
Rain Level
Crowd Level
Packing Focus
May
45–60
Low–Moderate
Low
Warm layers, insulated jacket
June
50–65
Moderate
Medium
Layering + sunscreen
July
55–70
Moderate
High
Lightweight layers + rain shell
August
55–65
High
High
Waterproof gear + quick-dry clothes
September
45–60
High
Low
Insulated layers + waterproof boots
Alaska Cruise Packing List by Month
May Alaska Cruise Packing List
Weather vibe: Crisp. Fresh. Slightly dramatic in the mornings.
May is shoulder season. Fewer crowds. Lower prices. Wildlife waking up. Snow still decorating mountain peaks like powdered sugar.
Pro tip: Alaska rain is often light but steady. Waterproof beats “water-resistant” every time.
September Alaska Cruise Packing List
Weather vibe: Cozy. Quieter. Moody in a poetic way.
September is shoulder season again. Fewer crowds. Lower prices. Cooler temperatures. Possible Northern Lights toward late month. It is also the wettest month of the season, since fall is the rainiest time of year in Southeast Alaska, according to the Alaska Climate Research Center.
Planning what to pack for an Alaska cruise can feel a little overwhelming. Alaska weather changes quickly, and layering is the key to staying comfortable while exploring glaciers, wildlife areas, and coastal towns.
To make packing easier, we created a free printable Alaska Cruise Packing Checklist you can download and use while preparing for your trip.
It includes:
• Clothing layers for Alaska’s changing weather • Rain gear and cold-weather essentials • Excursion gear for wildlife viewing and glacier days • Cruise ship outfits and onboard essentials • Travel documents and helpful items many travelers forget
Many travelers find it helpful to keep the checklist open while packing so nothing gets forgotten before departure.
If you’re still deciding when to sail, you may also want to read our guide on the best time to visit Alaska, which breaks down weather, wildlife, and cruise season month by month.
Motion sickness remedies (just in case). The CDC says acupressure wristbands work no better than a placebo, so ask your doctor about a patch or pill before you go.
Passport. U.S. citizens on a round-trip sailing from Seattle can use a birth certificate and photo ID, but if you have to leave the ship in Canada you will need a passport to fly home. Sailings that start in Vancouver need one anyway.
Portable charger
Reusable water bottle
You’ll want comfortable walking shoes for exploring the best Alaska cruise ports, especially if you’re planning longer excursions.
What to Pack for Glacier Viewing Days
Glacier viewing days are colder because you’re standing still on deck, often early in the morning. Wear insulated layers, gloves, and a windproof jacket even in July.
What NOT to Pack for an Alaska Cruise
Let’s save your suitcase some trauma.
You do NOT need:
7 pairs of heels
12 fancy outfits
Heavy winter parka (unless going very early/late)
Hair styling tools you won’t use in 90% humidity
Beach-only outfits
This is an adventure cruise, not Miami.
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Quick Voice Search Answers: Alaska Cruise Packing by Month
What should I pack for an Alaska cruise in May?
Pack for cool days and chilly mornings: a waterproof insulated jacket, a fleece, thermal tops, gloves, a beanie and waterproof walking shoes. Snow still on the peaks means sunglasses earn their spot too.
What should I pack for an Alaska cruise in July?
Bring light layers, a waterproof jacket, walking shoes and sunscreen. July is the warmest month, but rain is still possible, so keep the rain shell in your day bag.
What should I pack for an Alaska cruise in August?
Everything you would pack for July, plus a heavier rain jacket, waterproof pants for excursions, extra socks and quick-dry clothes. August is still peak season, but it is wetter than June or July.
What should I pack for an Alaska cruise in September?
Pack like it is fall: an insulated waterproof jacket, a heavy fleece, thermals, wool socks, gloves and waterproof boots. September is usually the wettest month of the season, so waterproof matters as much as warm.
Do I need waterproof shoes for an Alaska cruise?
Yes. Many Alaska cruise ports and shore excursions involve rain or damp trails, and wet sneakers on day two can ruin the rest of the week.
FAQs About Alaska Cruise Packing
Is May or September colder on an Alaska cruise?
May and September tend to be the coolest months of cruise season.
Do I need a heavy winter coat?
Not typically. A waterproof insulated jacket with layers is enough.
Can I wear jeans on an Alaska cruise?
Absolutely. Jeans are perfect for most days.
Do Alaska cruises have formal nights?
Many do, but “formal” is usually cocktail attire, not ball gowns.
Is it worth cruising Alaska in September?
Yes. Fewer crowds, potential Northern Lights, and lower prices.
How rainy is Alaska cruise season?
Rain is common, especially August and September. Waterproof gear is essential.
Written by Sue Nelson, Travel Advisor | Adventures by MJ | Updated for 2027
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Hi, I'm Sue. I plan cruises, all-inclusive resorts, and slow multi-country trips through Europe, and I'm a member of the Travel Leaders Network. Twenty years in senior HR leadership before this, which mostly taught me how to read what people actually want. I live in Grain Valley, Missouri with my husband and business partner Mike.
