I second that water temps are not anywhere near enjoyment time....maybe not until after Spring Break in April. Depending on the weather fronts that come thru, April could be anything from "too cold" to "iffy" to "sorta OK". April , to us, is still a bit nippy. It's wonderful outdoors, but not in the water. The folks from up north don't seem to mind the cooler water temps as much, tho. By mid-May to Memorial Day, the water temps get better and better.
I would suggest that you put Ocean Pointe at Palm Beach Shores on the list. I'm sure the season starts much earlier down there.....anywhere north of that is iffy....check avg temps online. jme