The main thing to know to avoid problems in this part of Florida is to stay more than 100 yards off lifeguarded beaches. This also includes being onshore with a kite flying. There are a couple small guarded beaches just north of you and a large one along Delray.
There are only two areas in Florida, currently, that require certification, Matheson and Crandon in Miami. To my knowledge certification isn't required to ride anywhere else in the state for now. If we work to avoid problems it may stay that way, if not more may join in. You can take an inexpensive, short written exam at Matheson in lieu of providing a certification.
North isn't a great direction for shoreside launch in the much of the Keys. Usually land is in the way making the wind uneven, stalling kites, etc.. Folks may take boats out to the flats or sandbars to help clean things up down there. If you like open ocean riding with waves, north works out well in Jupiter and points north. I typically use the marine forecast at the following link. It isn't right all the time, far from it, but seems to be less in error for this area than some other resources. Forecasts improve in reliability, such as it is within about three days. Beyond that is may happen, or not!
http://www.srh.noaa.gov/mfl/ You might check in to see if folks post where they are going to be.