I lived there in the 1980s. Go to the North Shore of Oahu if you're staying on that island for bodysurfing, which is just jumping in the water - or diving into it as the gigantic waves hit the shore. The waves come all the way from Alaska and so in winter are huge. Don't go too far out. Rent a car to drive around to see the sites if you can. There is an excellent bus system so that will do if you want. Go to the windward, or eastern side of the island by car if you can to Kaneohe, just to see the view from the Pali Highway, it's fantastic. Pearl Harbotr museum is there too, I never got there. Go to Ala Moana mall if you like malls it is neat because it is indoor/outdoor from the open air rooftop areas. Buy pineapple if you do at the supermarkets and not near the beach it's cheaper. There is so much to do and the sunshine is there and so much fun - I really want to move back someday away from the miserable cold - have fun!