Pokai Bay on Oahu offers a shore-entry reef experience suitable for beginners. The site features depths ranging from 6 to 21 metres, with an average depth of 10 metres. Conditions vary, with visibility between 1 and 15 metres and mild currents. Divers and snorkellers should be aware of potential hazards including surf, strong currents, sharp coral, jellyfish, and sharks. Facilities at the site include parking, toilets, and showers. Species recorded around this area include the Spanish Dancer, Potter's Angelfish, Whitetip Reef Shark, Leaf Scorpionfish, Speckled Butterflyfish, Blue Dragon, Wedgetail Triggerfish, Snake Eel, Varicose Wart Slug, Scorpionfish, Desirable Flabellina, Slate Pencil Urchin, Slipper Lobster, and African Clown Wrasse.

Five Inch Reef is a marine reef site located off the coast of Oahu, Hawaii. The site is characterised by a consistent depth of approximately 8 metres, making it a suitable location for beginner divers. Conditions at this site are subject to variation, though water temperatures remain stable between 25C and 27C throughout the year. As a reef environment, the topography consists of submerged rock structures typical of the region. Access to this site is typically by boat, and it is suitable for those seeking shallow, accessible reef diving.

Turtle's Reef is a marine reef site located off the coast of Oahu, United States. Accessible only by boat, the site sits approximately 4023 metres from shore. Divers can expect depths ranging from 5 to 12 metres, with an average depth of 10 metres. Conditions are generally mild, with visibility typically between 15 and 30 metres. Water temperatures remain consistent throughout the year, averaging between 25 and 26 degrees Celsius. The site is suitable for beginners, with typical dives lasting around 30 minutes. Hazards at this location include boat traffic and the presence of sharks. Guided tours, boat charters, and equipment rental facilities are available for visitors.

Makaha Caverns on Oahu offers a straightforward introduction to cavern diving with depths ranging from 8 to 15 metres. The site features a reef and cavern structure accessible via both shore and boat entry, located approximately 150 metres from the shore. Visibility typically spans 10 to 30 metres, allowing for clear observation of the cavern openings. While mild currents are standard, divers should monitor for surge and swell, which can increase in force within the caverns. Facilities available on-site include parking, toilets, showers, and a rinse station. The site is suitable for Open Water certified divers, with typical dives lasting around 50 minutes.

The Seaplane Wreck off Oahu is an artificial reef resting at depths between 18 and 35 metres. This site requires boat access and is suited for advanced divers due to significant depth, strong currents, and the overhead environment presented by the wreckage. Visibility typically ranges from 24 to 30 metres, allowing for clear views of the structure. Divers should maintain strict buoyancy control and monitor air supply closely throughout the dive. Given the potential for shifting currents, surface marker buoys are essential. This site is not suitable for beginners or those without appropriate advanced training for deep, overhead environments.

Tracks Beach Park in Oahu offers a shallow shore dive featuring a mix of reef and artificial reef structures. Divers typically explore at an average depth of 4 metres, with dives lasting around 30 minutes. The site is suitable for beginners, though conditions vary with mild currents and potential surge. Visibility fluctuates significantly, ranging from 2 to 33 metres. Marine life recorded here includes wrasses, speckled butterflyfish, and forcepsfish. Divers may also encounter giant frogfish, Spanish dancer, spotted eagle ray, leaf scorpionfish, Potter's angelfish, whitetip reef shark, yellow-edged moray, day octopus, turkey moray, oriental flying gurnard, and snowflake moray. Facilities at the park include parking, toilets, and showers. Be aware of rip currents and sharp coral.

Electric Beach in Oahu is a reef and artificial reef site defined by the warm water discharge from the adjacent power plant. This discharge attracts a high volume of marine life to the area. Divers typically access the site from the shore, swimming approximately 180 metres to reach the reef. Depths range from 3 to 12 metres, with an average of 8 metres. Conditions at this site are variable, with visibility ranging from 3 to 33 metres. The site is suited for intermediate divers due to the presence of strong currents, rip currents, and surf. Boat traffic is a known hazard in the area. Facilities include parking, toilets, and showers.

Electric Beach in Oahu is a reef and artificial reef site defined by the warm water discharge from a nearby power plant. This shore entry site is located 100 metres from the beach and features an average depth of 8 metres, with a range between 3 and 10 metres. Divers should be prepared for moderate currents, potential surf, and boat traffic in the area. Visibility is highly variable, ranging from 3 to 30 metres. Facilities at the site include parking, toilets, and showers. Due to the environmental conditions and currents, this site is suited for intermediate divers.