Long Beach Breakwater is an artificial reef located near Two Harbors, Santa Catalina Island. This site is suitable for beginners, offering a manageable depth range of 8 to 12 metres with an average of 9 metres. Divers access the reef from the shore, encountering mild currents and visibility ranging from 5 to 15 metres. Due to variable visibility and active boat traffic, divers should exercise caution and tow a surface marker buoy throughout the 45-minute dive. Water temperatures fluctuate between 15 and 20 degrees Celsius, making a wetsuit necessary for comfort. Always check local conditions and facility availability before planning your dive.

Cabrillo Beach in Two Harbors offers a shallow, accessible shore dive suitable for beginners. The site features a mix of reef, kelp forest, seagrass, and artificial reef habitats. Divers can expect depths ranging from 3 to 9 metres, with an average of 6 metres. Conditions include mild currents and visibility between 3 and 10 metres. Water temperatures fluctuate between 15C and 20C, with potential for rapid, significant cooling. The site is equipped with parking, toilets, showers, and a rinse station. Night diving is permitted, and typical dives last around 45 minutes. Hazards include low visibility, sharks, sharp coral, strong currents, and surf.

Radio Tower is an artificial reef located off Two Harbors, Santa Catalina Island. This site sits at depths between 26 and 34 metres, with an average depth of 30 metres, making it suitable only for advanced divers. Access is by boat only. Visibility typically ranges from 5 to 10 metres, and currents are variable. Divers must exercise caution regarding nitrogen narcosis and decompression requirements due to the depth. The artificial structure presents potential entanglement hazards, necessitating precise buoyancy control. Always confirm current conditions with your skipper before entry and carry an SMB to manage boat traffic and ascent safety.

White Point in Two Harbors features a diverse underwater landscape of natural reef, kelp forest, and artificial structures. Divers explore depths between 1 and 10 metres, averaging 7 metres. The site is notable for shallow underwater hot water vents that create rippling thermal waves. Marine life includes common sea stars, brittle stars, and ochre sea stars, alongside uncommon Spanish shawls, tube worms, and sea hares. Rare sightings include the lesser two-spot octopus, flatworms, clown dorids, and various crustaceans. Entry is possible from both shore and boat, though divers must navigate surf and shore breaks. Due to kelp density and variable visibility of 3 to 6 metres, careful buoyancy and equipment management are required.

Olympic II is a wreck dive located off the coast of Two Harbors, Santa Catalina Island. This site is strictly for advanced divers due to the depth, which averages 30 metres, and the presence of moderate currents. Access is exclusively by boat, as the wreck lies approximately 5633 metres from the shore. Divers should be aware of potential hazards including boat traffic, entanglement risks, and strong currents. Visibility at this location is variable, ranging from 10 to 80 metres. Water temperatures fluctuate throughout the year, reaching a maximum of 18C in late summer and dropping to 14C during the winter months.

Archery Range in Two Harbors is a reef and kelp forest site offering depths between 5 and 15 metres. Divers can expect mild currents and visibility ranging from 3 to 10 metres. The site is accessible from both shore and boat, though the entry requires caution due to potential surf and shore break. Marine life recorded here includes California sea lions, harbour seals, and California spiny lobsters. Nudibranchs such as Spanish shawls and red sponge dorids are present, alongside various sea stars, brittle stars, and sea hares. With water temperatures between 15 and 20 degrees Celsius, this site is suited for intermediate divers.

Veteran's Park on Santa Catalina Island offers a shore-accessible dive featuring a combination of artificial reef structures and canyon topography. With an average depth of 5 metres, this site is suitable for beginners. Divers frequently encounter California sea lions, horn sharks, East Pacific red octopuses, and garibaldi. Other species recorded here include scorpionfish, California spiny lobsters, and various nudibranchs like the Spanish shawl. Conditions vary with visibility ranging from 4 to 15 metres and mild currents. Hazards include boat traffic, surf, and a thermocline. Facilities at the site include parking, showers, and a rinse station. Night diving is permitted, with typical dives lasting around 40 minutes.

Malaga Cove is a shore-entry reef and kelp forest site located in Two Harbors, Santa Catalina Island. Divers and snorkellers navigate depths ranging from 3 to 12 metres, with an average depth of 6 metres. The site features mild currents, though conditions vary with visibility ranging from 5 to 25 metres. Hazards include potential entanglement in kelp, variable visibility, and surge. Shore entries require caution due to surf and shore breaks. Water temperatures fluctuate between 15C and 19C throughout the year. Parking is available on-site, and the location is suited for intermediate skill levels.