7 Hour Layover - enough time to hit the beach?

Hey Folks!! I am flying out for a wedding in November and there's a cheap layover for me in Ft. Lauderdale. Are there any nice (public) beaches to kill 5 hours at near the airport??? Preferably with a place to rent an umbrella? (I burn easily). Travelling light so don't necessarily need a locker but that would be nice. Also a place to get a drink. Thanks!