Bro, you're at the wrong beach.
You need to go to the gulf side. The water is so much better. Check out Clearwater beach (near Tampa).
BUT even better, even though it's not a party atmosphere, check out Bahia Honda in the Florida Keys. It's literally the most beautiful beach I've been to in the US. Miami has plenty of action if you hit the clubs.
Oh dang! I didn't knew, next time better (I'm not much of a clubber though)! Do you live nearby this area? I think we had the plan to visit the Keys (can you also waterboard/jet-ski there?), but something came up and we went to The Tiki Hut @ Lake Keowee instead. Not a beach, but that was quite refreshing as well.