Hanauma Bay is a volcanic crater bay on Oahu providing shore-based access to a diverse reef system. Depths range from 1 metre in the shallows to 21 metres at the outer reef, with an average depth of 9 metres. Visibility typically spans 12 to 24 metres, though surge can affect clarity. Divers and snorkellers must navigate a shore break and be prepared for moderate currents and potential rip currents. The site is suitable for intermediate skill levels, with advanced certification recommended for deeper sections. On-site facilities include parking, toilets, showers, and equipment rental. Arrive early as access is capped and the car park fills quickly.

Deep D is an artificial reef located 2400 metres off the coast of Oahu. This site features a consistent depth of 15 metres, making it suitable for beginner divers. Access is by boat only. Divers can expect mild currents and visibility ranging between 20 and 30 metres. The water temperature remains stable throughout the year, typically between 25 and 27 degrees Celsius. Night diving is permitted at this location. Divers should be aware of sharp coral present in the area. A typical dive at this site lasts approximately 45 minutes.

New Reef is a shallow marine site located 100 metres off the coast of Oahu. This reef is suitable for beginners, featuring a consistent depth of approximately 6 metres. Access to the site is by boat only. Water temperatures at this location fluctuate between 24C and 27C throughout the year. As a shallow reef environment, it offers a straightforward dive experience for those looking to explore the local underwater topography.

The Sea Tiger is a 50-metre-long vessel sunk in 1999 as an artificial reef off Oahu. Resting upright on the seabed at depths between 18 and 37 metres, the wreck offers penetration opportunities for advanced divers, including cargo refrigeration holds, hallways, and the engine room. Divers regularly encounter wrasses, T-bar swallowtail, and various moray eels, including turkey, yellow-edged, snowflake, and undulated species. Other sightings include giant frogfish, leaf scorpionfish, whitetip reef sharks, and day octopuses. Due to the depth, overhead environment, and potential for moderate currents, this site is strictly for advanced divers. Boat access is required, and the site is also suitable for night diving.

Nautilus Reef is a site composed of an ancient lava field located 300 metres offshore from Oahu. This reef features a shallow northwest section that slopes to a maximum depth of 30 metres, with an average depth of 12 metres. Divers can access the site via boat or shore. Conditions include visibility ranging from 10 to 30 metres, though divers should be aware of strong currents and surge. The site is suitable for beginners and supports night diving. Facilities available at the location include parking, toilets, showers, changing rooms, boat charters, and guided tours. Typical dives at this location last approximately 30 minutes.

The Sea Tiger Wreck is an artificial reef located 5000 metres off the coast of Oahu. This wreck dive sits at depths ranging from 24 to 37 metres, with an average depth of 30 metres. Access is strictly by boat. Due to the depth, potential for entanglement, overhead environments, and moderate currents, this site is suitable only for advanced divers. Visibility typically ranges between 15 and 30 metres, and water temperatures fluctuate between 22C and 25C throughout the year. Divers should be aware of hazards including the deep profile and sharp structures associated with the wreck.

Kakaako Point features a combination of natural and artificial reef structures located 350 metres from shore. Divers can explore depths ranging from 7 to 18 metres, with an average depth of 10 metres. Visibility at the site typically spans 10 to 30 metres. The area is accessible by both shore and boat, making it suitable for beginner divers. Water temperatures remain between 23 and 26 degrees Celsius. Divers should be aware of moderate currents, potential surge, and surf during entry. Hazards include heavy boat traffic, rip currents, sea urchins, and sharp coral. Facilities available at the location include parking, toilets, a dive shop, and boat charter services.

Point Panic in Oahu is a reef and artificial reef site suitable for intermediate divers and snorkellers. The site features depths ranging from 6 to 18 metres, with an average depth of 7 metres. Access is via a shore entry. Divers and snorkellers should be aware of variable conditions, including moderate currents, surge, surf, and potential rip currents. Visibility typically fluctuates between 10 and 30 metres. The area experiences boat traffic, and users should exercise caution regarding sharp coral. Facilities at the location include parking, toilets, and showers. Night diving is permitted, with typical dives lasting approximately 45 minutes.