Pack Layers, Not a Suitcase Full of Summer Clothes

Alaska's weather changes fast and varies wildly by region and season. Even in summer, temperatures range from the 50s to low 70s Fahrenheit, and you'll hit rain, wind, and occasional snow depending on which ports you visit and when you sail. A single t-shirt won't work—you need to layer so you can add or remove clothing as conditions shift throughout the day.

Start with a base layer of merino wool or synthetic material that pulls moisture away from your skin. Add a fleece or wool sweater, then a waterproof outer jacket. Bring long pants, jeans, and at least one pair of warm leggings. Pack a beanie, gloves, and a scarf—these take almost no space and make a real difference when you're on deck watching glaciers. Waterproof hiking boots or sturdy shoes are essential; the ship's decks get wet, and many ports involve walking on uneven terrain.

Key Takeaways

  • Bring waterproof layers in multiple weights because Alaska weather shifts between rain, wind, and occasional snow even in summer months.
  • Pack motion sickness medication, seasickness patches, or ginger supplements before you board, since rough water is common in the Inside Passage and open ocean.
  • Sunscreen and sunglasses are critical—glaciers and snow reflect intense UV rays, and the long daylight hours in summer mean more sun exposure than you expect.
  • Bring binoculars and a good camera with extra batteries, because wildlife sightings and glacier views are the main reason people take Alaska cruises.
  • Check your cruise line's dress code for formal or semi-formal nights and pack one or two outfits that meet it, since most ships require them for at least one dinner.

Seasickness Prevention Matters More Than You Think

Alaska cruises spend significant time in open water, especially if your itinerary includes the Gulf of Alaska or a longer route. Rough seas are common, and seasickness can ruin days of your vacation. Don't wait until you're already sick—bring medication or prevention methods with you.

Over-the-counter options include dramamine or bonine tablets, which you take before you feel queasy. Prescription scopolamine patches (Transderm Scop) are stronger and last three days, but you need to ask your doctor before the cruise. Ginger supplements, acupressure wristbands, and candied ginger work for some people. The ship's medical office sells seasickness medication, but it's more expensive and you may not have the option you prefer. Bring what works for you from home.

Sun Protection Is Underestimated in Alaska

Many people assume Alaska is too cold for sunburn, but glaciers and snow reflect UV rays intensely, and the long daylight hours in summer mean more sun exposure than you'd get in the lower 48 states. You can burn badly even on overcast days, and sunburn makes the cold feel worse.

Pack high-SPF sunscreen (SPF 30 or higher) and bring enough to reapply throughout the day—the ship's shops sell it at cruise-ship prices. Sunglasses that block UV rays are essential, especially if you spend time on deck or take excursions to glaciers. A wide-brimmed hat protects your face and scalp. Lip balm with SPF prevents painful chapped lips in the wind and cold.

Binoculars and Camera Equipment Make the Difference

Alaska cruises are built around wildlife and scenery—whales, bears, eagles, and glaciers. You'll see more and enjoy it more if you bring binoculars. Compact 8x42 or 10x42 binoculars are light enough to carry all day and powerful enough to spot distant animals. Many people regret not bringing them.

A good camera with extra batteries is equally important. Your phone camera works in good light, but Alaska's overcast days and fast-moving wildlife demand better. Bring a camera with optical zoom, extra memory cards, and at least two fully charged batteries—you'll use more power than you expect, and charging opportunities on excursions are limited. If you're serious about photography, a tripod helps with glacier and landscape shots during stops.

Formal Night Clothing and Ship Etiquette

Most Alaska cruise lines enforce a dress code for at least one or two dinners per week. "Formal" usually means a suit or dress; "semi-formal" means dress pants or a skirt with a button-up shirt or blouse. Check your cruise line's specific policy before you pack—it varies by line and by sailing date.

You don't need a tuxedo or evening gown, but you do need one or two outfits that meet the code. Pack them in a garment bag to keep them wrinkle-free. If you absolutely refuse to dress up, most ships offer an alternative casual dining venue on formal nights, but you'll miss the main dining room experience and may feel out of place. Bring comfortable shoes for formal dinners—you'll be on your feet, and dress shoes that hurt aren't worth it.

Medications, Documents, and Ship-Specific Items

Bring all prescription medications in their original labeled bottles—cruise lines and customs require it. Pack a small first-aid kit with pain relievers, antacids, allergy medication, and any personal medications you use regularly. Alaska's remote ports mean limited pharmacy access if you run out.

Your passport or passport card is required for most Alaska cruises, even if you're a U.S. citizen, because you'll visit Canadian ports. Check your cruise line's specific requirements—some sailings visit only U.S. ports and don't require a passport, but most do. Bring travel insurance documents, your cruise line's app (read it before you board), and any pre-booked excursion confirmations. A small day pack or backpack is useful for carrying layers, water, and camera gear during port days.

What Not to Overpack

Cruise cabins are small, and you'll have limited closet and drawer space. Resist the urge to pack "just in case" outfits. You'll wear the same comfortable clothes repeatedly, and the ship's laundry service (usually paid) can wash items mid-cruise if you need them. Don't pack formal shoes beyond what the dress code requires—one pair of dress shoes and one pair of comfortable walking shoes are enough.

Leave behind heavy winter coats if you're cruising in summer; the layering system works better and takes less space. Don't pack full-size toiletries—bring travel sizes or buy them on the ship. Most cabins have limited counter space in the bathroom, and you'll appreciate not being crowded. A lightweight rain jacket takes up almost no space and works better than a heavy waterproof coat.

Frequently Asked Questions

Do I need a passport for an Alaska cruise?

Most Alaska cruises visit Canadian ports and require a valid passport or passport card for all passengers, including children. Some itineraries visit only U.S. ports (like those starting and ending in Seattle) and may not require a passport, but check your specific cruise line's requirements before booking. It's safer to have one.

What's the best time of year to cruise Alaska?

June through August offers the warmest weather (50s to 70s), longest daylight hours, and most active wildlife. May and September are shoulder seasons with fewer crowds, lower prices, and still-good weather, though it's colder and darker. October and later have limited sailings and very cold temperatures. Most people choose June through August.

Can I bring my own alcohol on the cruise ship?

No. Cruise lines prohibit passengers from bringing alcohol aboard. You can purchase drinks on the ship, and many lines offer beverage packages that cover unlimited drinks for a set price. Check your cruise line's policy on what's included in your fare.

Will I get seasick on an Alaska cruise?

It depends on the route and your sensitivity. Inside Passage cruises are calmer than Gulf of Alaska routes. Newer ships have stabilizers that reduce motion. If you're prone to seasickness, bring prevention medication and take it before you feel sick—waiting until symptoms start makes it harder to control.

What should I wear for glacier viewing and wildlife excursions?

Wear your warmest layers, waterproof jacket, waterproof boots, gloves, and a beanie. Bring a small backpack with water, snacks, sunscreen, and a camera. Excursions often involve standing outside in cold, wet conditions for hours. Dress warmer than you think you need—you can always remove layers, but you can't add them if you didn't bring them.