i did not use a wetsuit to snorkle at the hotel. when we went scuba-ing, bob used a full-wetsuit (rented for like $10) and i got one too, but i did not use mine. I probably would have used a long sleeve water shirt (i had a short sleeve t-shirt on) and that would have been perfect. the wetsuit would have been too "hot" for me, but i don't deal well with being hot in the water, it makes me seasick.