Jewfish Point, located off Avalon, provides a diverse underwater environment featuring a mix of reef, kelp forest, and wall structures. The site ranges from 12 to 40 metres in depth, with an average of 20 metres. Access is by boat only, and divers should be aware of active boat traffic and potential surge near the wall. Visibility typically spans 10 to 30 metres, and currents remain mild. Water temperatures are cool, ranging from 14 to 17 degrees Celsius throughout the year, making a 5mm wetsuit recommended. The site is suitable for beginners, though careful attention to buoyancy and surface safety procedures is required due to the local boat activity.

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.

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.

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.

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.

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.

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.