We went to HHI in April once(it was not Easter week, but it was vacation is MA so it was around April 15). Whether was beautiful, high 70's. We went to the beach and did sit by the pool, but DS was the only one who really did swimming and that was in the pool. No one was really in the ocean for swimming but walking and beach coming was wonderful. We usual go in July or at Christmas, but really like that time of year also. Golf, tennis and boating is great then. Also the resort has many activities both indoor and outdoor.
Have fun
Connears