I live in Boca but routinely ride in South Delray these days. Why? The beach is typically wider, parking is closer to the launch, there are no rock outcrops along the shore, there is even a pump for inflating kites at the launch. Delray is six miles up the coast, very close by. The launch is about 400 ft. south of Casurina Rd. in Delray or about 1 mile south of Atlantic Avenue. More about the Delray Rules at:
http://fksa.org/showthread.php?t=349
Regarding wind, there may be thermals but then again there may not be. The current forecast is light, then again they almost never forecast thermal winds in advance. Hope you get a good session in.