There's a current thread on the Trip Advisor board about water temps and if December water is warm enough to swim. We had noticed the water temperature dropping when we were there this past November, experiencing a considerable change in the two week stay. Maybe this had something to do with Sandy since it had passed, albeit to the west, just prior to our arrival. At any rate we do know there's a difference in the water temps from Nov to Feb and that brings us to the point of this post.
We've just received our wet suits we ordered from Amazon. After reading about what suit is right for each activity and water temp we decided on what is called "shorty" suits. The last few years we've noticed the need, in Feb, to wear our rash guards when doing long extended snorkel excursions. I'm sure many from the east coast would say "what a bunch of sissy's", seeing how Vieques averages 80 degree water in Feb, but for us it just makes things much more comfortable. What we've gleaned from our limited wet suit purchases is that you need to order a larger size than what you think would fit. I've had to send mine back for the next larger size. Lorries was a full 2 sizes larger than what she would normally wear in pants. Mine fit fine in the legs but was way too small in the chest and arms. One of the beautiful things about Amazon though is it's return policy. Just print out the return sheet, put it in the box and leave the package outside your door. The UPS guy picks it up the next day with a prepaid label. Just about as painless as it gets.
Gray weather and cold temps here in Indiana make us more than ready for the next 8 weeks to pass so we can get back to Vieques.