Catalina Island

Santa Catalina Island is one of the premier diving destinations in California — a rugged, largely undeveloped island in the Santa Catalina Channel, 22 miles off the coast of Los Angeles, whose waters are protected within the Catalina Island Marine Conservation Area and host some of the most diverse and spectacular marine life accessible on the Pacific Coast of North America. The island's volcanic geology, combined with the nutrient-rich upwelling and temperate channel waters, has created an environment where cold-water productivity and tropical-influenced diversity overlap — an unusual combination that makes Catalina diving both ecologically distinct and visually compelling. The most famous single dive site on the island is Casino Point Underwater Park in Avalon, California's first officially designated underwater park, where divers can encounter giant black sea bass, California moray eels, sheephead, garibaldi, and the towering kelp forests that define the Southern California diving experience. Beyond Casino Point, Catalina offers dozens of distinct dive sites spread around its 54-mile coastline: the kelp forests of Lover's Cove, the diverse rocky reefs of the Isthmus, the exposed west end sites including the legendary Farnsworth Banks with its black coral, and numerous points and coves along the island's relatively undeveloped northern coast accessible only by boat. Water temperature varies from the mid-50s Fahrenheit in winter to the low 70s in late summer, and visibility — typically good by California standards — can reach 40 to 80 feet on the clearest days. Catalina is served by a regular ferry service from Long Beach, San Pedro, and Dana Point, and a robust dive charter industry operates from both the mainland and Avalon. For Southern California divers, Catalina represents the island escape that defines the regional diving identity — a destination worth repeated visits across a lifetime of diving.