The park lies on both sides of the Sebastian Inlet, which forms the boundary between Brevard and Indian River counties.

Part of the park is south of the inlet on North Vero Beach in Indian River County A Spanish fleet was wrecked in this area in 1715.

Today, the McLarty Treasure Museum (a part of the park) exhibits artifacts relating to the wreck.

There are facilities for swimming, surfing, snorkeling and scuba diving from the 5 km (3.1 mi) of Atlantic beach.

A tidal pool (Robert Campbell Cove) within the state park contains varied marine and bird life and permits a safe area for swimming and a beach for children.