The Valiant Wreck is a 75-foot luxury yacht that sank in 1930. Resting in Avalon, the site features depths ranging from 27 to 30 metres, with the shallow side at 27 metres and the deeper side at 30 metres. This wreck dive is suited for intermediate divers due to the overhead environment and potential boat traffic. Divers can access the site by boat or shore, though an Avalon Harbor Permit is required prior to diving. Conditions typically include mild currents and visibility between 10 and 20 metres. Water temperatures fluctuate between 14C and 18C throughout the year.

Casino Point Dive Park in Avalon is a protected marine area featuring a diverse underwater landscape of reefs, kelp forests, and artificial structures. Divers can explore depths ranging from 4 to 32 metres, with a thermocline typically present at 40 feet. The site is accessible via a shore entry and is suitable for beginners, though divers should be aware of mild currents and occasional surge. Visibility generally fluctuates between 10 and 30 metres. Facilities at the park include toilets, showers, rinse stations, and equipment rental services. Night diving is permitted, and the site is well-supported by local dive shops offering air fills and guided tours.

The Suejac Wreck is a shore-accessible artificial reef located off Avalon, United States. The structure sits at depths ranging from 18 to 27 metres, with an average depth of 23 metres. Divers experience visibility between 10 and 30 metres and mild currents. Due to the depth and overhead environment, this site requires careful monitoring of bottom time and decompression limits. Divers should be aware of potential entanglement risks and boat traffic near the entry point. A wetsuit of at least 5mm is recommended to manage water temperatures that fluctuate between 14 and 19 degrees Celsius throughout the year.

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.

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.

Gallagher Beach is a boat-accessible dive site located off Avalon, Santa Catalina Island. The topography features a kelp forest that transitions into a deeper reef, with depths ranging from 18 to 35 metres. Divers should expect cool water temperatures between 14C and 17C, necessitating thick thermal protection such as a 7mm wetsuit or drysuit. Visibility typically spans 5 to 10 metres. While currents are generally mild, conditions can shift, and divers must remain vigilant regarding surge and local boat traffic. Due to the depth and environmental factors, this site is suited for intermediate divers. A surface marker buoy is recommended for all ascents.

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.

Willow Cove is a shallow reef and kelp forest site located near Avalon, Santa Catalina Island. The site features depths ranging from 5 to 10 metres, providing a comfortable environment for beginners and those looking to build confidence in the ocean. A boat is required to reach this location, which is situated 4815 metres from the shore. Divers and snorkellers can expect mild currents, though visibility varies significantly depending on conditions. The site is accessible year-round, with water temperatures fluctuating between 15C and 20C throughout the year. It is recommended to check local visibility and boat charter availability before planning a trip.