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.

Moonstone Cove is a reef site located 800 metres offshore from Avalon, United States. The site features depths between 7 and 11 metres, with visibility typically ranging from 5 to 10 metres. Mild currents make this location suitable for beginner divers. Access is by boat only, and guided tours are available to assist with navigating the reef layout. Water temperatures fluctuate between 15 and 20 degrees Celsius throughout the year. Divers should remain vigilant regarding boat traffic while surfacing, and the use of a delayed surface marker buoy is recommended. Species recorded around this area include California sea lions, Garibaldi, Spanish shawls, horn sharks, and California spiny lobsters.

White Cove is a boat-access reef and kelp forest site located off Avalon, Santa Catalina Island. The site features a consistent depth of 20 metres, with visibility ranging from 5 to 30 metres. While currents are generally mild, divers must monitor for surge and swell conditions, which can develop rapidly. The kelp forest provides significant structure and shelter for marine life. Species recorded around this area include California sea lions, Garibaldi, horn sharks, California moray, and California spiny lobsters. Divers should arrange air fills and equipment hire before departing from the dock, as no facilities are available on site.

Frog Rock is a reef and kelp forest site located 4000 metres off the coast of Avalon. This site is suitable for beginners and maintains a consistent depth of 13 metres. Divers and snorkellers can expect mild currents and visibility ranging from 5 to 10 metres. Water temperatures fluctuate between 15 and 21 degrees Celsius throughout the year, making a wetsuit advisable. Access to this site requires a boat. The topography features a kelp canopy above a reef structure, providing a manageable environment for those looking to explore the local marine habitat.

Hen Rock, located off the coast of Avalon, offers a classic California reef and kelp forest environment suitable for beginner divers. The site features depths ranging from 5 to 26 metres, with an average depth of 10 metres. Navigation is straightforward due to mild currents and visibility that typically spans 10 to 30 metres. Access to this site requires a boat. Divers should be aware of heavy boat traffic in the area and must use a surface marker buoy at all times, particularly when surfacing, to ensure visibility to vessel operators. Open Water certification is required to dive here.

Pirate's Cove in Avalon offers a combination of reef and kelp forest environments. The site is accessible by boat only and features depths ranging from 6 to 30 metres, with an average depth of 9 metres. Visibility typically spans 10 to 25 metres, and currents are generally mild. Due to water temperatures between 14 and 17 degrees Celsius, a full wetsuit is recommended. Divers should remain vigilant for boat traffic and potential entanglement in kelp. When navigating the reef, take care to avoid contact with sea urchins and jellyfish. The site is suitable for beginner divers, with a typical dive duration of 45 minutes.

Long Point features a reef and kelp forest system extending from the shallows to depths of 130 metres, with an average depth of 40 metres. Intermediate divers typically explore the 15 to 30 metre range. The site is accessible by boat or from the shore, though shore entries require caution due to constant surf and shore break. Visibility ranges from 10 to 30 metres, and water temperatures fluctuate between 11 and 16 degrees Celsius. Moderate currents are common, and divers must remain vigilant regarding heavy boat traffic in the area. Facilities available at the site include parking, toilets, showers, and a cafe.

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.