In early April the temps can range from mid 60's to mid 80's. The ocean may still be a little cool to enjoy, but the pools are heated and the resort's activities are in full swing. The beach will usually be delightful, even if the ocean is still cool.
The area is quite active with Spring Break vacations from early March thru late April.
By late June and early July the ocean temp will be low-to-mid 80's!It does warm up quickly.
There will be plenty to do at that time.
Enjoy!