What is this park like in December? Is the water heated? Seems like the water would be cold with the temp in the 50s at night and 70s during the day.

They are not open this time of year. Busch Gardens right across the street is though if you are in town visiting and looking for something to do!

I'm not sure. We went there last year in Sept. However when we came to Florida on vacation before moving here we were at the beach at the end of February and we were the idiots that went swimming lol. You may have to call them and see if their water is heated.