Aliso is a versatile dive site located on the Pacific Coast of Orange County, featuring a combination of natural reef, kelp forest, and artificial reef structures. Divers can explore depths ranging from 5 to 15 metres, with an average depth of 11 metres. Conditions include moderate currents, surge, and visibility between 5 and 15 metres. Entry can be made from the shore or by boat, though the shore break requires careful timing between sets. Due to potential rip currents and surf, this site is best suited for intermediate divers. On-site facilities include parking, toilets, showers, and a cafe, making it a convenient location for a standard 45-minute dive.

Laguna Beach on Santa Catalina Island features a diverse underwater landscape comprising a compact reef, kelp forest, and cave sections. Suitable for beginners, the site ranges from 5 to 15 metres in depth with an average of 8 metres. Divers can access the site via shore or boat, though shore entries require caution due to potential surf, surge, and rocky terrain. Visibility typically spans 5 to 10 metres, and mild currents are common. Water temperatures fluctuate between 15 and 19 degrees Celsius, necessitating adequate thermal protection. The site supports night diving and offers convenient on-site facilities including parking, showers, and air fills.

Bird Rock is a shallow reef and artificial reef site located 9 metres from shore at Santa Catalina Island. With depths ranging from 5 to 8 metres, it is suitable for beginner divers. Divers can access the site via shore or boat. Visibility typically ranges between 5 and 10 metres. The site is subject to moderate currents and significant surge, which can fluctuate quickly. Divers should monitor water conditions closely and maintain neutral buoyancy to navigate the reef structure safely. Due to the potential for strong water movement, timing entries for slack water is recommended to manage the surge and current effectively.

Rock Pile at Santa Catalina Island is a shore-entry reef and artificial reef site ranging from 2 to 15 metres in depth. Divers typically experience mild currents and visibility between 5 and 10 metres. The site is suitable for beginners, with an average depth of 10 metres allowing for dives of approximately 50 minutes. Entry requires caution due to surf and shore break; thick-soled footwear is recommended to protect against sharp rocks and sea urchins. Facilities available at the site include parking, toilets, showers, changing rooms, and a rinse station.

Monument Point is a shore-access reef dive located at Santa Catalina Island. The site features a shallow profile ranging from 7 to 9 metres, providing a practical environment for beginner divers. Divers can expect mild currents, though conditions are influenced by surge and swell. Visibility typically ranges between 5 and 10 metres. Access is via a shore entry that requires careful timing to navigate the active surf and shore break. On-site facilities include parking, toilets, showers, and changing rooms, allowing for a comfortable post-dive experience. The site is well-suited for those building confidence in reef terrain.

Picnic Beach on Santa Catalina Island offers a mixed natural and artificial reef environment suitable for beginner divers. The site features depths ranging from 6 to 12 metres, with an average depth of 8 metres. Shore entry requires navigating a surf and shore break, where divers should shuffle their feet to avoid sea urchins. Conditions include mild currents and visibility varying between 5 and 25 metres. Surge and swell can impact visibility near the coast, so careful timing during entry and exit is advised. On-site facilities include parking, toilets, and showers for post-dive convenience.

Fisherman's Cove on Santa Catalina Island features a sheltered reef, kelp forest, and artificial reef structures. The site ranges from 5 to 12 metres in depth, with an average of 8 metres, making it suitable for beginner divers. Visibility varies significantly from 5 to 30 metres. Divers can access the site from both shore and boat, located 100 metres from the coast. Conditions include mild currents, though surge and swell can affect shore entries. Divers should remain vigilant for boat traffic and exercise caution around sharp rocks and kelp entanglement. Facilities including air fills, equipment rental, and a cafe are available on-site.

Shaw's Cove is a popular shore-entry site on Santa Catalina Island featuring a reef and kelp forest environment. Divers and snorkellers can explore depths ranging from 1 to 16 metres, with an average depth of 8 metres. The site is located 75 metres from the shore and is suitable for beginners, though users should be prepared for a rocky entry, surf, and surge. Visibility typically ranges between 5 and 15 metres, with moderate currents. Marine life frequently observed includes Garibaldi, Hermissenda, and White-spotted Sea Goddess. Less common sightings include Leopard Shark, California Moray, Spanish Shawl, Lesser Two-spot Octopus, Horn Shark, Harbor Seal, wrasses, California Spiny Lobster, Scorpionfish, Clown Dorid, and various drum and croaker species.