I was there this past February...in the beginning of the week it was chilly during the day, in the 50's. It was usually in the low 50's at night, but one night they had a frost warning! As the week went on, the days started off cool, but got up to low to mid 70's by lunch time. I usually wore capri jeans or khakis, short sleeve shirt, hoodie zip sweat shirt (which I tied around my waist by 10:00), short socks and sneakers. We swam almost every day (of course, being from N.E., it felt downright toasty!) The days were sunny, dry and gorgeous. You may want to bring a pair of shorts as well.