We were there this past April, during the third week. I never even thought of putting on a jacket, or sweater in the morning or night. The pool was great, people were in it at night, although we did not use it at night. My DW on the other hand gets cool very easily, and wore a sweater most mornings and nights. But she is cold unless it is 80. The kids had no qualms about getting in the pool, loved the water.