Avalon's diving is defined by kelp forest, with most sites combining reef, kelp columns and occasional wall topography reached by boat. The Garibaldi, California Sea Lion, Eagle Ray and Horn Shark are reliably encountered across the site mix. A decommissioned oil rig and a sunken yacht add structural variety for advanced and intermediate divers. Conditions peak through late summer and autumn, when water is warmest and visibility is at its best.
Monthly water temperature across Avalon's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperature climbs from cool winter and spring conditions to its warmest in late summer, and the best-months data confirms that July through November draws the most diver activity. Visibility also tends to improve as summer progresses, making late summer and early autumn the sweet spot for clear water in the kelp. Winter diving is perfectly viable for those comfortable in cooler conditions, with far fewer boats on the water.
16 operators
Avalon, United States
Avalon, United States
Avalon, United States
20 more sites to explore
Water temperature around Avalon ranges from about 14°C in January to 18°C in August, based on satellite sea-temperature data for its dive sites.
In the warm season (about 18°C) a 5mm suit is comfortable in Avalon; in the coldest months (about 14°C) step up to a 7mm or semi-dry suit.
Fin maps 32 sites in Avalon (32 scuba diving sites and 3 snorkelling spots, with some suited to both).
Across Avalon's dive sites, July, August, September and October are most often reported as the best months to visit.
Avalon's site list is dominated by kelp forest and reef, which support a rich community of species. The Garibaldi, California Sea Lion and Eagle Ray are among the most frequently observed, alongside the Horn Shark, California Moray and Lesser Two-spot Octopus. Smaller reef residents such as the Bluebanded Goby, Blacksmith and Giant Kelpfish are present across most sites, and the Leopard Shark is also commonly encountered.
A good proportion of Avalon's sites are rated beginner, including Italian Gardens, Seal Rocks, Pirate's Cove and Church Rock, all of which combine reef and kelp forest at manageable depths. Intermediate sites such as the Catalina Island wall dive and Little Gibraltar are available for those building experience. Advanced divers have dedicated options in Oil Rig Edith and Little Farnsworth, a deep pinnacle site.
Nearly all of Avalon's dive sites are boat-access only, and the operators listed include Catalina Divers Supply, Ron Moore's Dive Catalina, Catalina Scuba and several others who run guided charters. A small number of sites, including Long Point and the Valiant Wreck, can also be reached from shore as an alternative. Booking with a local operator is the practical way to reach the majority of the site list.
The bulk of Avalon's diving is kelp forest and reef, which delivers the region's characteristic fish life and invertebrate encounters. The Valiant Wreck offers a different experience, resting at depth and providing a compact structure to explore. Oil Rig Edith stands apart as a decommissioned artificial reef with a complex superstructure, suited to advanced divers comfortable with deeper water. Pinnacle sites such as Little Gibraltar and Little Farnsworth add dramatic topography for those seeking more varied terrain.
