South Beach Park / Rio Mar Reef
At the End of 17th Street just east of A1A. Widest beach in the area with lifeguards, picnic tables, restrooms and showers.
Surfers ride the waves  just to the south side of the beach,  there is a nice clean break in this area, it is a shallow sandy bottom. You can get a nice long ride. To the South of South Beach , this is called the Cove, there are no other public Beaches, but there are a few  walking acesses, but there is no parking or security of a park. Surfing in the cove area is good,  but hard to get to, unless you know someone that lives in one of the many beach side residential communities.  
Divers there is no reef  at this beach,  though to the north about 100 yards is the begining of the Rio Mar Reef, which is one of the largest expances of reef along the beach. If you are up for a long walk in soft sand, then South beach could be considered an acess to Rio mar reef.  If you dont want to do the walk then you need to go to the Rio Mar Drive Public Entrance, it has 4 parking spots, and it closes at dusk.   An Alternate entry point  is at Flamevine Drive. entrance which is just N. of Rio Mar Drive Entrance.

 Call Water N Sports for a Beach Surf & Dive Report 772-228-9290

Take a look at the link below it really shows you what Rio Mar Reef Looks Like
Aerial View of Reef system  from Tracking Station To Riomar South End CLICK HERE