http://128.160.23.54/products/K10/caribbeank10.gif
Water temps around the Caymans are currently low 80s. Warm for me -
probably just a skin - but water temp is a very personal thing. I know
people that wear a dry suit til it gets into the mid-80s.
Wear what you are comfortable wearing. A comfortable diver is less likely
to be stressed and according to some probably unscientific studies or papers
I have read, stress may be a contributing factor to DCS.
CH