Bird Rock, located 800 metres from the shore of Two Harbors, offers a diverse underwater environment featuring a reef, wall, and kelp forest. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 18 metres. The site is accessible only by boat and is suited for intermediate divers. Marine life frequently encountered includes California sea lions, Garibaldi, and Kelp bass. Less common sightings include Leopard sharks, California moray, Eagle rays, Horn sharks, California spiny lobster, and various nudibranchs. Visibility typically ranges from 10 to 30 metres. Divers should be aware of potential hazards including boat traffic, surge, and strong currents.

Lions Head is a marine reef and kelp forest site located near Two Harbors on Santa Catalina Island. Divers can explore depths ranging from 6 to 30 metres, with visibility typically between 10 and 20 metres. The site is suitable for beginners and features mild currents, though divers should remain aware of surge and boat traffic. Marine life frequently recorded here includes common Kelp Bass and various snails, alongside uncommon sightings of California Sea Lions, Horn Sharks, Spanish Shawl nudibranchs, Garibaldi, California Moray eels, and California Spiny Lobsters. Other species present include Scorpionfish, Atlantic Pyrosomes, Klipfish, Grunts, Sea Stars, and Copper Rockfish. Access to this site requires a boat.

West End Eagle Reef is a reef and pinnacle site located 600 metres offshore from Two Harbors. The site features a depth range of 3 to 37 metres, with an average depth of 15 metres. Due to moderate currents and boat traffic, this site is suited for intermediate divers. Boat access is required, and divers should deploy a surface marker buoy upon ascent. Visibility varies between 5 and 25 metres, and water temperatures range from 14 to 17 degrees Celsius, necessitating a 7mm wetsuit or drysuit. Species recorded around this area include California sea lions, Spanish shawls, guitarfish, eagle rays, leopard sharks, harbor seals, and California spiny lobsters.

Cherry Cove is a reef and kelp forest site located off the coast of Two Harbors. The site features depths ranging from 6 to 27 metres, with an average depth of 20 metres. Visibility typically spans 10 to 20 metres, allowing for clear views of the kelp canopy and reef structure. Conditions are generally mild, making this a suitable location for beginner divers. Access is by boat only, and divers must remain vigilant regarding boat traffic in the area. A dive flag and surface marker buoy are essential for safety during ascents. Air fills, dive shops, and guided tours are available through local boat charter operators.

Located near Two Harbors, this site features a mix of reef, kelp forest, and artificial reef topography. Divers access the area by boat, with sites typically located 1000 metres from shore. Depths range from 5 to 7 metres, with an average of 10 metres. Conditions are variable, with visibility ranging from 6 to 24 metres and water temperatures between 15C and 20C. Due to thermoclines, temperatures can drop significantly in deeper water, making a 7mm wetsuit or drysuit advisable. Hazards include cold water, depth, entanglement, low visibility, and surge. Facilities available in the area include air fills, equipment rental, and guided tours.

Harbor Reefs, located off the coast of Two Harbors, features a combination of reef structures and kelp forest terrain. Divers typically explore at depths between 15 and 20 metres, with an average depth of 17 metres. The site is accessible by boat only, situated 750 metres from shore. Conditions include mild currents and visibility ranging from 10 to 30 metres, though thermoclines and upwellings can cause rapid changes in water temperature and clarity. Divers should be aware of boat traffic, surge, and the presence of sea urchins and sharp rocks. A thick wetsuit is recommended due to water temperatures between 15 and 19 degrees Celsius.

Eel Cove, located near Two Harbors on Santa Catalina Island, features a combination of reef and kelp forest topography. Divers typically explore depths ranging from 10 to 30 metres. The site is accessible only by boat and is suited for intermediate divers due to the presence of surge and potential boat traffic. Conditions generally offer visibility between 10 and 20 metres, with mild currents. Water temperatures fluctuate throughout the year, ranging from 14C in the winter months to 18C in late summer. A typical dive at this location lasts approximately 45 minutes.

Eagle Reef, located 550 metres from the shore of Two Harbors, is a marine site featuring a combination of reef and kelp forest topography. Divers typically encounter moderate currents at this location, which requires boat access. Depths range from 3 to 30 metres, with an average depth of 15 metres. Visibility varies significantly, ranging between 5 and 25 metres. Water temperatures fluctuate between 15C and 18C throughout the year. Due to the presence of moderate currents and potential boat traffic, this site is best suited for intermediate divers. Typical dives at this location last approximately 40 minutes.