We were there for a long weekend in March 2019. The days were warm, my daughter utilized the pool. The nights were a bit cooler. Could certainly wear something a bit warmer.
Depends on what part of March..
We use to go the first week of march every year.
The temp was perfect at high 70s -80 but the beach was a little cold. .. the weather seemed to warm up some by the end of the month.
We like February/Early March. Although our last March trip which was the first week of March we had 90s. So you never can tell. It'll be better than July or August. LOL!
Normally, it's very pleasant. We went in March 2017, and a winter storm happened to hit during our visit. We each only had one pair of long pants, and we had to visit the clearance section at the local walmart to purchase a sweatshirt for each of us.