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.

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.

Italian Gardens is a reef and kelp forest site located 1500 metres off the coast of Avalon. The site features depths ranging from 6 to 30 metres, with an average depth of 15 metres. Visibility typically spans 10 to 25 metres, allowing for views through the kelp canopy. Divers should be prepared for moderate currents and thermoclines, with water temperatures between 14 and 18 degrees Celsius. Access is by boat only, which helps avoid surf and shore breaks. Beginners are advised to book a guided tour to navigate the shallower reef sections and manage current conditions. Always watch for boat traffic during ascent and surface under the vessel's flag.

Casino Point in Avalon is a shore-accessible dive site featuring a kelp forest and reef environment. Divers typically experience depths averaging 8 metres, with a maximum depth of approximately 8.5 metres. The site offers visibility ranging from 12 to 30 metres and mild currents, making it suitable for beginners. Dives here generally last around 50 minutes. Water temperatures fluctuate between 15C and 20C throughout the year. Facilities available at the location include air fills, equipment rental, and guided tours. Divers should remain aware of boat traffic in the area.

Willow Cove is a shallow reef and kelp forest site located near Avalon, Santa Catalina Island. The site features depths ranging from 5 to 10 metres, providing a comfortable environment for beginners and those looking to build confidence in the ocean. A boat is required to reach this location, which is situated 4815 metres from the shore. Divers and snorkellers can expect mild currents, though visibility varies significantly depending on conditions. The site is accessible year-round, with water temperatures fluctuating between 15C and 20C throughout the year. It is recommended to check local visibility and boat charter availability before planning a trip.

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.