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.

Al's (Crazy) Kelp is a kelp forest and reef site located 2000 metres off the coast of Avalon, United States. This boat-accessible dive features a consistent depth of approximately 9 metres. Divers should be prepared for moderate currents and the risk of entanglement within the kelp. Visibility at the site varies significantly, ranging from 5 to 25 metres. Water temperatures fluctuate between 15C and 20C throughout the year. Due to the current and potential for entanglement, this site is suited for intermediate divers. Typical dives last around 45 minutes.

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.

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.

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.

The Palisades is a boat-access reef and kelp forest site located off Avalon. Divers navigate depths ranging from 11 to 25 metres, with an average depth of 18 metres. Visibility at this site typically spans 10 to 30 metres. While the current is generally mild, conditions can vary, and divers should remain aware of potential surf at the surface. Due to heavy boat traffic in the area, the use of a surface marker buoy is essential before ascending. Water temperatures fluctuate between 15 and 18 degrees Celsius throughout the year, making appropriate thermal protection necessary for comfort.

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.