If you bring warm enough clothing to be comfortable on the Kenai Fjords boat ride , you'll be more than adequately prepared for any other outdoor strolling you might want to do in and around Seward. Even on the warmest summer days, the temperature on the water is cool, especially in front of the glaciers. Dress in layers so you will be comfortable at the different stages of the cruise. You can stay in a warm, comfortable cabin with big windows. Rubber boots or water-resistant hiking boots are preferred footwear.
Some people bring rain suits.
You can bring a small duffel bag or day pack aboard with extra clothing in case you find you need it. The jackets would also come in handy in town if it's raining. The outfits are not insulated, so if you buy one, get one large enough to wear comfortably over a couple layers of clothing or mid-weight jacket. This web site also features high-quality, warm jackets if you need one. Helly Hanson is the preferred outfitter of commercial fishermen up here.