Cardiff State Beach offers a shallow marine environment featuring reef and kelp forest topography. Located 120 metres from the shore, the site reaches depths between 3 and 9 metres, with an average depth of 6 metres. Divers should anticipate moderate currents, surge, and surf conditions, with visibility ranging from 3 to 10 metres. Hazards include jellyfish, sea urchins, and rip currents. The site is suitable for beginners and typically allows for 45-minute dives. Facilities at the beach include parking, toilets, showers, and a rinse station. Water temperatures fluctuate throughout the year, ranging from 15C in the winter months to 21C during late summer.

La Jolla Canyon features a dramatic drop-off where the seafloor plunges into a deep submarine canyon. Divers access this site from the shore, swimming approximately 300 metres to reach the kelp forest and reef structures. The topography includes a steep slope leading to depths between 12 and 40 metres, with an average depth of 18 metres. Conditions vary, with moderate currents, surge, and visibility ranging from 5 to 12 metres. Water temperatures fluctuate between 14C and 18C, though upwelling events can cause temperatures to drop significantly at depth. Due to the depth, potential for strong currents, and cold water, this site is suited for intermediate divers.

La Jolla Shores Canyon is a marine site featuring a canyon, wall, and reef topography. Divers access the site from the shore, with the canyon located approximately 150 metres out. Depths range from 11 to 40 metres, with an average depth of 20 metres. Conditions are variable, with visibility between 5 and 15 metres and moderate currents. Hazards include surf, surge, cold water, and low visibility. Water temperatures fluctuate between 14 and 18 degrees Celsius, though upwelling can cause further cooling. The site is suitable for intermediate divers and supports night diving, with typical dives lasting 45 minutes. Facilities at the shore entry point include parking, toilets, and showers.

Vallecitos Point is a shore-entry dive site in the United States featuring a combination of reef, wall, and kelp forest topography. Divers can explore depths ranging from 9 to 16 metres. The site is home to a variety of marine life, including common sightings of California sea lions, leopard sharks, horn sharks, guitarfish, and eagle rays. Other inhabitants include the East Pacific red octopus, Garibaldi, Spanish shawl, and California spiny lobster. Divers should be aware of potential hazards such as cold water, surf, rip currents, down currents, and entanglement risks. Facilities at the site include parking, toilets, and showers. Night diving is permitted at this location.

La Jolla Shores is a versatile marine site featuring a combination of reef, kelp forest, canyon, and artificial reef topography. Divers can expect depths ranging from 5 to 40 metres, with an average depth of 15 metres. Access is via a shore entry, making it suitable for beginners. Conditions vary, with visibility typically between 5 and 15 metres and mild currents. The site supports night diving and offers facilities including parking, toilets, showers, and rinse stations. Divers should be aware of potential hazards including jellyfish, sea urchins, and surf. Dive shops and guided tours are available in the area to assist with logistics and air fills.

La Jolla Kelp Forest offers a shore-entry dive into a dense kelp canopy located 90 metres from the beach. The site features a reef environment with depths ranging from 6 to 18 metres, averaging 13 metres. Conditions include mild currents, though divers should be prepared for surge, variable visibility between 3 and 12 metres, and potential kelp entanglement. The shore entry requires navigating surf and shore breaks, making it suitable for beginners who are comfortable with beach entries. Water temperatures fluctuate between 15 and 19 degrees Celsius throughout the year. Facilities at the site include parking, toilets, and guided tours.

La Jolla Cove is a protected marine sanctuary in San Diego, United States, offering diverse underwater topography including reef, kelp forest, cave, and seagrass habitats. Divers and snorkellers access the site via concrete stairs leading into a sheltered cove. Depths range from 3 to 30 metres, with an average of 10 metres. Conditions include moderate currents, surge, and surf, with visibility between 3 and 12 metres. Water temperatures fluctuate between 14C and 19C, necessitating a 7mm wetsuit year-round. Hazards include rip currents, entanglement, and strong currents. Facilities at the site include parking, toilets, and showers. Night diving is permitted, with typical dives lasting 50 minutes.

Marine Room in La Jolla, United States, is a shore-accessible site featuring shallow reef and seagrass habitats. Divers can explore depths ranging from 1 to 15 metres, with typical dive times around 65 minutes. The site experiences mild currents and visibility between 3 and 10 metres. Conditions are generally manageable, though divers should be aware of surf, surge, and sharp coral. This location is suitable for beginners and supports night diving. As there are no public facilities or convenient parking nearby, it remains a quieter alternative to other local dive spots.