They tend to fill up early. My advice is to arrive before 7 a.m. on weekends or dive the spot on weekdays. However, once in the water you'll find the diving relaxed and uncrowded. In La Jolla, along Coast Blvd., near downtown. Parking is free but some areas away from the cove have a two or three hour time limit.
Access is via a pair of well-maintained stairway and a sandy beach.
There is a lifeguard station at the cove and is a good place to seek diving advice. Nothing may be taken or disturbed. Plan on arriving before 7 a.m. to get a parking spot near the entry on weekends or dive the cove on weekdays. Watch for rip currents and breaking waves in shallow areas. A Diver's Guide to Monterey County.