Sentinel Point is a reef dive site located near Two Harbors on Santa Catalina Island. The site is accessed by boat and is suitable for beginner divers. Depths range from 9 to 17 metres, with an average depth of 13 metres. Divers should be aware of boat traffic in the area. Conditions include moderate currents and visibility typically between 5 and 9 metres. Water temperatures fluctuate throughout the year, ranging from 15C in the winter months to 19C during late summer and autumn. A typical dive at this location lasts approximately 45 minutes.

Farnsworth Bank is a remote offshore reef and pinnacle system located 3200 metres from the coast of Two Harbors. The site features dramatic topography including walls and drop-offs, with depths ranging from 17 to 40 metres and an average depth of 27 metres. Due to the exposed location, divers encounter strong currents and variable visibility between 12 and 30 metres. This site is strictly for advanced divers and requires boat access. Water temperatures range from 14 to 17 degrees Celsius, with a noticeable thermocline at depth. A 7mm wetsuit or dry suit is recommended for thermal protection. Hazards include boat traffic, deep water, and potential entanglement.

China Point is a reef dive located off the coast of Two Harbors, Santa Catalina Island. The site features a reef structure that spans depths between 12 and 28 metres, allowing for exploration across varying levels. Divers typically access the site by boat. Conditions include moderate currents that can fluctuate with the tides, and visibility generally ranges from 10 to 30 metres. Water temperatures remain between 14 and 18 degrees Celsius throughout the year, necessitating appropriate thermal protection. While the site is suitable for beginners, divers should coordinate with their boat operator to assess current strength before entry.

Located off Avalon, Catalina Island, this site features a combination of reef, kelp forest, and wall topography. Divers typically explore depths between 9 and 30 metres, with an average depth of 12 metres. Access is by boat only, as the site is situated 8 kilometres from shore. Conditions include strong currents and visibility ranging from 12 to 18 metres. Water temperatures fluctuate between 14 and 18 degrees Celsius, with potential thermoclines in deeper sections. Hazards include cold water, entanglement risks, strong currents, and surf. Species recorded around this area include California sea lions, Garibaldi, horn sharks, Spanish shawl nudibranchs, California moray eels, and California spiny lobsters.

Salta Verde is a reef site located near Avalon on Santa Catalina Island. This site is accessed by boat and is suited for intermediate divers. The average depth is approximately 7 metres, with conditions generally featuring mild currents. Water temperatures fluctuate throughout the year, ranging from 15C in the winter and spring months to 21C in August. Species recorded around this area include California sea lions, Garibaldi, California moray, horn sharks, Spanish shawl nudibranchs, lesser two-spot octopus, leopard sharks, eagle rays, wrasses, California spiny lobster, Atlantic pyrosomes, scorpionfish, three-lined aeolids, and barracuda.

Rock Quarry near Two Harbors is a boat-accessible site featuring a combination of reef, artificial reef, and kelp forest habitats. The site reaches depths between 6 and 36 metres, with an average depth of 18 metres. Divers should be prepared for mild currents and potential boat traffic. Visibility typically ranges from 13 to 15 metres, and water temperatures fluctuate between 14 and 18 degrees Celsius throughout the year. Due to the depth and environmental conditions, this site is suited for intermediate divers. Species recorded around this area include California sea lions, Garibaldi, Spanish shawls, horn sharks, California morays, leopard sharks, eagle rays, lesser two-spot octopuses, guitarfish, scorpionfish, California spiny lobsters, Atlantic pyrosomes, wrasses, and egg-yolk jellyfish.

Lobster Bay, located off the coast of Two Harbors, features a combination of reef structure and kelp forest. Divers can explore depths ranging from 17 to 30 metres with visibility typically between 10 and 20 metres. Access to this site is by boat only. Conditions include mild currents, though surge and swell are common hazards that require careful monitoring of positioning near the reef. Water temperatures fluctuate between 14 and 18 degrees Celsius throughout the year, necessitating appropriate thermal protection. This site is suited for intermediate divers, and Open Water certification is the minimum requirement for entry.

Cape Cortes, located off Two Harbors, features a combination of reef and kelp forest environments. Divers typically explore depths between 20 and 25 metres, with visibility ranging from 10 to 24 metres. The site is accessible by boat only and experiences mild currents. Due to water temperatures between 15 and 18 degrees Celsius and the presence of thermoclines, a 7mm wetsuit or drysuit is recommended. Divers should monitor depth and bottom time to manage risks associated with nitrogen narcosis and decompression. Surface boat traffic requires caution during ascents, and care should be taken to avoid entanglement within the kelp forest.