Hi I live in Daytona, and can tell you that there will be spring breakers here in March! Right now, the Nascar folks are in town, then Bike Week (motorcycles) starts the beginning of March, with spring break overlap before and after. However, the city has made a determined effort to control the quantity of breakers vs the quality of family vacations - no more MTV party with Jerry Springer, etc.! The breakers seem to congregate more toward the Boardwalk/main part of town (where the clubs are) - if you stay south, say like the Shores area, you will have a lot less congestion. As far as water temp, I like warm warm warm so I'm not a good one to ask, but kids don't seem to mind and swim whatever the temp - water should be mid-sixties or more by then - brrr to me, but kids on the beach will play in the surf 'till their lips are purple!