Going by the forecast and the fact that we've had a powerful system just move down the state I would say if you really want to try to find wind tomorrow you are better off making it to the Keys as fast as you can. Mainland southern Florida (both coasts) is looking light for the next few days in the wake of this system. It might not work out that way but it often does. The Keys may be catching the tail end of the system plus they often are in the middle of a larger pressure gradient than the mainland, hence more wind more of the time. It is supposed to dip down there on Saturday and return on Sunday unlike points north.
Checkout the forecasts on the SE Florida site to see what I mean at:
http://fksa.org/showthread.php?t=6734
Have fun!