Weather & What to Expect

Seattle serves as a major embarkation point for Alaska cruises, and it's crucial to understand the weather realities of both locations. During the Alaska cruise season, which runs from April 19, 2026, to October 11, 2026, Seattle experiences summer temperatures typically between 65-75°F. However, these are daytime highs; mornings can be significantly cooler. Peak cruise month in Seattle is August of 2026. Don't underestimate the need for layers, even in summer. Once you sail north, ports like Juneau and Ketchikan can experience sudden showers and cooler temperatures. This means that even on excursions marketed as "sunny day" activities, rain gear is essential. Remember that being on deck for glacier viewing in Glacier Bay will feel much colder than the forecast suggests, especially with wind chill.

The Layering System

The key to comfortable Alaska cruising is mastering the layering system.

Base Layer: Start with a moisture-wicking fabric like merino wool or a synthetic blend. Avoid cotton as it retains moisture and can leave you feeling cold and damp. Merino wool offers excellent temperature regulation and odor control, while synthetics are typically more affordable and quick-drying. A moisture-wicking Alaska cruise t-shirt is a perfect first layer.

Mid Layer: Fleece jackets or down vests provide crucial insulation. Fleece is lightweight, breathable, and dries quickly, making it ideal for active days. Down offers superior warmth-to-weight ratio but loses its insulating properties when wet; consider a synthetic down alternative for better performance in damp conditions. A lightweight puffy jacket is also a great choice.

Outer Shell: A waterproof shell is non-negotiable. Look for a jacket with taped seams to prevent water from seeping through stitching, and a hood for added protection. Breathability is also important to prevent overheating during physical activity. A rating of 10,000mm waterproofness and 5,000g/m²/24h breathability offers a good balance for Alaska's conditions.

Footwear

Choosing the right footwear is essential for comfort and safety, both onboard and ashore.

Primary Shoe: Waterproof hiking shoes or trail runners are ideal for Alaska cruises. These provide ample support for walking on uneven terrain, have good traction for slippery surfaces, and keep your feet dry in wet conditions. Look for shoes with a waterproof membrane like Gore-Tex or similar. Consider models with ankle support if you plan on doing more strenuous hikes.

Backup Option: A pair of comfortable walking shoes or sneakers is perfect for onboard use and casual port days. Choose a lightweight, breathable option that can easily be packed away. These are also useful for evenings on the ship or exploring towns with paved streets.

What NOT to Wear: Avoid open-toed shoes like sandals or flip-flops, especially on shore excursions. These offer no protection from the elements or uneven terrain. High heels are also impractical for walking on potentially slippery decks or cobblestone streets. Opt for practical and comfortable footwear that prioritizes safety and weather protection.

Essential Gear & Accessories

Don't underestimate the importance of accessories for maximizing your comfort and enjoyment.

• Binoculars: Essential for wildlife viewing, especially during glacier viewing days. Choose a pair with at least 8x magnification for optimal clarity.
• Warm Hat (Beanie): Even summer mornings on deck can be chilly. A warm hat will make a significant difference in your comfort level.
• Waterproof Gloves: Lightweight and waterproof gloves are ideal for wildlife watching or any outdoor activity where your hands might get wet.
• Sunglasses: Glaciers and water reflect a significant amount of sunlight. Protect your eyes with a good pair of sunglasses.
• Sunscreen: Even on cloudy days, the sun's rays can be strong, especially at higher latitudes.
• Refillable Water Bottle: Stay hydrated and reduce plastic waste by bringing a refillable water bottle. Many ports have water fill stations.
• Camera with Extra Batteries: Cold weather can drain camera batteries quickly. Bring extra batteries and keep them warm in a pocket to maximize their lifespan.
• Small Backpack: A daypack is useful for carrying essentials like water, snacks, sunscreen, and extra layers on shore excursions.

Onboard vs. Port Day Packing

Consider your itinerary when packing to ensure you have appropriate attire for both onboard activities and shore excursions.

Sea Days/Glacier Viewing Days: On sea days, comfort is key. Pack comfortable loungewear, such as leggings, joggers, or jeans. For glacier viewing days, dress in warm layers, including a base layer, fleece jacket, waterproof outer shell, warm hat, and gloves. An Alaska cruise hoodie or sweatshirt is perfect for evenings on deck.

Port Days: For port days in locations like Seattle, Juneau, and Ketchikan, dress in layers that can be easily adjusted to changing weather conditions. Waterproof hiking shoes or trail runners are recommended for exploring towns and going on excursions. Be prepared for rain, even if the forecast calls for sunshine.

Evening Dress Code: Cruise lines like Carnival, Celebrity, Cunard, Holland America, Lindblad Expeditions, and NYK Cruises typically have a relaxed dress code, even on formal nights. While some passengers may choose to dress up in cocktail dresses or suits, it's perfectly acceptable to wear dress pants and a sweater or a casual dress. Check with your specific cruise line for details.

What to Skip

Avoid overpacking unnecessary items that will only take up valuable space in your luggage.

• Excessive Formal Wear: Unless you specifically enjoy dressing up, you likely won't need more than one formal outfit. Alaska cruises tend to be more casual than Caribbean cruises.
• Bulky Hairdryer: Cruise ships typically provide hairdryers in cabins. Save space and weight by leaving yours at home.
• Too Many Books: While reading is a great way to relax on a cruise, consider bringing an e-reader instead of multiple physical books to save space.
• Expensive Jewelry: Leave valuable jewelry at home to avoid the risk of loss or theft.
• Beach Towels: Cruise ships provide towels for onboard use and shore excursions. There's no need to bring your own.

Frequently Asked Questions

Will I have access to laundry facilities on board?

Most cruise ships offer laundry services, either through onboard laundry facilities (self-service) or a laundry service where your clothes are washed and pressed for you. Check with your cruise line for pricing, which typically ranges from $3-5 per item for self-service or $5-15 per item for the laundry service. Some cruise lines offer unlimited laundry packages for an additional fee.

What is the dress code like on an Alaska cruise?

Alaska cruises tend to be more casual than other types of cruises. During the day, comfortable and practical clothing is recommended for shore excursions and onboard activities. Evenings are generally relaxed, with some cruise lines having one or two formal nights where passengers can dress up if they choose.

What kind of weather can I expect in Alaska during the cruise season?

The Alaska cruise season, spanning from late April to early October, experiences a wide range of weather conditions. Expect temperatures between 50°F and 75°F, with a high likelihood of rain, even in summer. Pack layers to adapt to changing conditions, and always bring a waterproof rain jacket.

What are some essential items to pack for shore excursions?

Essential items for shore excursions include waterproof hiking shoes or trail runners, a waterproof rain jacket, a small backpack, sunscreen, sunglasses, a refillable water bottle, and a camera with extra batteries. Don't forget binoculars for wildlife viewing.

Are there any restrictions on what I can bring on board the cruise ship?

Cruise lines typically have restrictions on certain items, such as alcohol, weapons, and hazardous materials. Check with your cruise line for a complete list of prohibited items before packing. Generally, you are allowed to bring a limited amount of non-alcoholic beverages on board.

Is it necessary to bring insect repellent?

While mosquitoes are not as prevalent on an Alaska cruise as in some other destinations, it's still a good idea to bring insect repellent, especially if you plan on spending time in wooded areas or going on hiking excursions. Choose a repellent with DEET or picaridin for effective protection.

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Read More About Seattle

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• Seattle Airport to Cruise Port: Complete Alaska Cruise Transfer Guide
• Alaska Cruise Packing List 2026
• Best Alaska Cruise Ports 2026
• Best Alaska Cruise Itineraries 2026

Explore Alaska Cruise Port Guides

• Juneau Cruise Port Guide
• Ketchikan Cruise Port Guide
• Skagway Cruise Port Guide
• Glacier Bay Cruise Port Guide
• Victoria, BC Cruise Port Guide
• Alaska Cruises 2026: All Ports & Ships

Gear Up for Your Alaska Cruise

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