I would recommend smaller, check the forecast for the week on Saturday before you leave.
This is the forecast for the beach you should go to:
http://www.windfinder.com/forecast/playa_del_condadoYou'll want to ask for Ocean Park, in Condado. There, you will find a kite scene. Don't be afraid to greet and ask locals for help. From there you'll get directed to other spots if not satisfied.
PM me if you have further questions or concerns, but basically... shorts, kite and beers.
I've never seen a big foil kite out here.
Kindest regards,