Garibaldi Reef, located off Avalon, United States, is a reef site suitable for beginner divers. Reached exclusively by boat, the site sits 2500 metres from shore and offers a manageable experience with mild currents. Visibility typically ranges between 10 and 30 metres. Water temperatures fluctuate throughout the year, ranging from 15C in the winter months to 21C in late summer, necessitating the use of a wetsuit. Divers should remain vigilant regarding active boat traffic in the area and monitor their depth closely during descent and ascent. A surface marker buoy is recommended when surfacing to ensure safety from passing vessels.

Seal Rocks, located off the coast of Avalon, offers a reef and kelp forest environment at depths between 6 and 17 metres. Divers navigate through kelp columns and reef structures with visibility typically ranging from 5 to 10 metres. The site is suitable for beginners, though moderate currents and significant surge are common hazards. A 5mm to 7mm wetsuit is recommended to manage water temperatures between 15 and 19 degrees Celsius. Access is exclusively by boat, and divers should monitor sea states closely before entry. Species recorded around this area include California sea lions, Garibaldi, Spanish shawls, California morays, and various shark species.

Little Farnsworth is a deep pinnacle and reef site located off Avalon. The topography features a significant pinnacle structure surrounded by a kelp forest, with depths ranging from 15 to 40 metres and an average depth of 27 metres. Divers experience visibility between 10 and 20 metres. This site is suited for advanced divers due to strong currents, surge, and the risk of entanglement in the kelp. Access is by boat only, and divers should monitor for boat traffic at the surface. Typical dives last 45 minutes, and it is recommended to time dives around slack water to manage the currents.

Lover's Cove is a protected marine sanctuary near Avalon on Santa Catalina Island. This shore-entry site features a reef and kelp forest environment with depths ranging from 0 to 10 metres, averaging 5 metres. It is suitable for beginners, though divers should remain aware of boat traffic and potential surf. Marine life frequently encountered includes very common Garibaldi and common wrasses, which are often seen during the summer months. Less common sightings include California sea lions, California spiny lobsters, and scorpionfish. Visibility varies between 3 and 15 metres, and water temperatures fluctuate between 15C and 20C throughout the year.

Church Rock, located off the coast of Avalon, offers a diverse underwater environment featuring a combination of reef, kelp forest, and wall structures. Suitable for beginners, the site ranges in depth from 8 to 23 metres with an average of 15 metres. Divers should expect mild currents, though surge and swell can occur around the reef and wall. Visibility varies between 3 and 15 metres. Access is by boat only, and divers must remain aware of boat traffic at all times. A surface marker buoy is essential for ascents. Water temperatures range from 14 to 18 degrees Celsius, making a 5 mm wetsuit with a hood recommended.

Kelp Forest in Avalon is a shore-entry site featuring a dense kelp forest and reef environment. Divers typically explore depths between 5 and 29 metres, with an average depth of 15 metres. The site is suited for intermediate divers, with mild currents and visibility ranging from 5 to 15 metres. Marine life frequently encountered includes the bright orange Garibaldi and common scorpionfish and wrasses. Divers may also spot California sea lions, horn sharks, California moray, and California spiny lobster. Due to water temperatures between 14 and 18C, a 7mm wetsuit or drysuit is recommended. Facilities at the site include showers, toilets, rinse stations, air fills, and equipment rental.

Avalon Harbor in Avalon, United States, offers a diverse underwater environment featuring reefs, kelp forests, artificial reefs, and wrecks. Divers access the site from the shore for dives typically lasting 50 minutes. Depths range from 20 to 100 metres, with an average of 45 metres. Visibility varies significantly between 20 and 80 metres. Water temperatures range from 12C to 16C, with thermoclines consistently present at approximately 15 metres, causing a temperature drop of 3 to 6 degrees. Hazards include boat traffic, cold water, deep conditions, entanglement risks, jellyfish, low visibility, overhead environments, rip currents, sea urchins, and surge. Facilities include air fills, showers, toilets, changing rooms, rinse stations, dive shops, guided tours, and gear storage.

Binnacle Rock is a reef and kelp forest site located 2400 metres off the coast of Avalon. Divers can explore the structure of the reef and kelp at depths ranging from 7 to 13 metres. The site is suitable for beginners, though moderate currents require good buoyancy control. Visibility is variable, typically between 3 and 7 metres, necessitating close buddy contact. Water temperatures range from 15 to 19 degrees Celsius, so thermal protection is recommended. Hazards include boat traffic, surge, and potential entanglement in kelp. Divers should remain vigilant for sea urchins and sharp rocks on the seabed and always listen for surface traffic before ascending.