June may still be cool, but I would certainly pack shorts, tees and bathing suits. On our Alaska cruise (early Aug 99) one of my great "memory moments" was sitting at the pool in shorts and a tee shirt, watching people in and around the pool in bathing suits, and people around the pool in coats, hats and gloves! I guess it all depends on your own comfort level - how hot or cold you feel. Definately plan to do "layers" -- it can get pretty cool on deck sometimes, and there may be times when it can feel very warm in the sun. Also be sure and pack rain gear! And have a wonderful time!!!