Goat Harbor is a boat-access reef and kelp forest site located off the coast of Two Harbors. The site features depths ranging from 10 to 37 metres, with an average depth of 15 metres. Divers encounter mild currents and visibility typically between 5 and 10 metres. The kelp forest provides significant structure throughout the area. Due to the potential for boat traffic, it is essential to deploy a surface marker buoy before ascending. The site is suitable for beginner divers, with a typical dive duration of 45 minutes. Water temperatures range from 14 to 17 degrees Celsius, making a 5mm wetsuit recommended.

Twin Rocks is a boat-access reef and kelp forest site located off the coast of Avalon. The site features a depth range of 15 to 25 metres, with an average depth of 20 metres. Visibility typically ranges from 9 to 12 metres, providing views of the kelp canopy and reef structure. Water temperatures fluctuate between 15 and 18 degrees Celsius throughout the year. Divers should be prepared for moderate currents, which can intensify at depth. As a beginner, it is recommended to plan dives around slack water and maintain close proximity to the boat entry point. Always monitor your depth carefully while exploring this reef environment.

Paradise Cove in Two Harbors features a deep reef and kelp forest structure ranging from 16 to 37 metres. This boat-only site is suited for intermediate divers who possess strong buoyancy control and navigation skills. Visibility typically ranges between 5 and 10 metres, often affected by thermoclines. Divers should be prepared for mild to strong currents and potential entanglement risks within the kelp. Due to the significant depth and variable conditions, a drysuit or thick wetsuit is recommended. Species recorded around this area include California sea lions, Garibaldi, horn sharks, Spanish shawls, California moray, and California spiny lobster.

Rock Quarry near Two Harbors is a boat-accessible site featuring a combination of reef, artificial reef, and kelp forest habitats. The site reaches depths between 6 and 36 metres, with an average depth of 18 metres. Divers should be prepared for mild currents and potential boat traffic. Visibility typically ranges from 13 to 15 metres, and water temperatures fluctuate between 14 and 18 degrees Celsius throughout the year. Due to the depth and environmental conditions, this site is suited for intermediate divers. Species recorded around this area include California sea lions, Garibaldi, Spanish shawls, horn sharks, California morays, leopard sharks, eagle rays, lesser two-spot octopuses, guitarfish, scorpionfish, California spiny lobsters, Atlantic pyrosomes, wrasses, and egg-yolk jellyfish.

Eel Cove is a marine dive site located in Two Harbors, Santa Catalina Island. The site features a consistent depth of approximately 12 metres. Conditions at this location vary, with water temperatures ranging from 15C in the winter and spring months to 20C during the late summer and early autumn. As a marine environment, the site is accessible for diving activities. Divers should be prepared for variable conditions typical of the Santa Catalina Island region. The site has been documented in dive records dating back to 2012.

Rippers Cove is a marine dive site situated near Two Harbors on Santa Catalina Island. The site features a combination of reef and kelp forest topography. Divers can expect depths of approximately 21 metres. Visibility at this location typically ranges between 10 and 20 metres, with water temperatures fluctuating from 15C in the winter months to 19C during late summer. A typical dive at this location lasts around 45 minutes. Due to the depth and environment, this site is generally suited for divers with appropriate training and experience in kelp forest navigation.

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.

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.