Papohaku North Point is a rocky reef site on Oahu that features dramatic underwater topography. Snorkeling is restricted to rare flat-calm summer days, as the area is subject to strong currents, surf, and rip currents. Due to these challenging conditions, the site is suitable only for advanced snorkelers. Entry is via the shore. Facilities available at the location include parking, toilets, showers, and changing rooms. Divers and snorkelers should exercise caution regarding sharp coral and the potential for strong water movement. Visibility at this site can reach up to 43 metres, with water temperatures ranging between 24C and 27C throughout the year.

Hale O Lono Harbor is a remote man-made harbour located on the southwest coast of Oahu. The site features a combination of reef and artificial reef structures, with a rocky bottom situated near the breakwalls. Divers can expect depths ranging from 2 to 13 metres, with an average depth of 7 metres. Access is via a shore entry from the adjacent white sand beach. Conditions at this site are variable, with moderate currents, surf, and visibility typically between 3 and 8 metres. Due to the presence of strong currents, surf, and hazards such as jellyfish, sea urchins, and sharp coral, this site is best suited for intermediate divers.

Kaunakakai Wharf offers a distinct muck snorkeling experience situated directly beneath the main pier. The site features a sandy and silty bottom, providing a habitat for various invertebrates and macro life. With an average depth of 3 metres and a range of 1 to 5 metres, it is well-suited for beginners. Entry is via the shore, and conditions typically include mild currents and visibility ranging from 2 to 5 metres. Due to the location, snorkelers should remain vigilant regarding boat traffic. The water temperature remains consistent throughout the year, ranging between 24 and 27 degrees Celsius.

One Ali'i is a shore-entry snorkel site located on Maui, Hawaii. The area features shallow, reef-protected water that serves as a practice spot for beginners. Conditions are generally mild, though visibility can be low at times. The site is equipped with parking, toilets, and showers for visitor convenience. Snorkellers should exercise caution regarding sharp coral present in the area. The water temperature ranges from 24C to 27C throughout the year, providing a consistent environment for those learning to snorkel in a sheltered setting.

Moloka'i Outer Reef is a marine reef site located 1000 metres offshore from Maui. This site is accessed exclusively by boat and is suitable for intermediate divers. The average depth is 12 metres, with typical dives lasting around 50 minutes. Divers should be prepared for moderate currents and surf conditions. Visibility at the site ranges from 15 to 30 metres. The reef environment supports a variety of reef fish and invertebrates typical of the Hawaiian region. Hazards at this location include sharks, sharp coral, strong currents, and surf. Boat charters and guided tours are available for those planning to visit this offshore reef.

Makapu'u Beach Park on Oahu offers a varied underwater landscape featuring reefs, walls, caves, and caverns. This shore-entry site is suited for intermediate divers due to the presence of strong currents, rip currents, and surf. Depths range from 4 to 18 metres, with an average of 12 metres. Visibility is highly variable, ranging from 3 to 30 metres. The site is accessible for night diving. Facilities available at the park include parking, toilets, showers, and a rinse station. Divers should be aware of hazards including jellyfish, sharp coral, and overhead environments within the caves and caverns.

Nanahoa, also known as Five Needles, features dramatic sea stacks rising from the seafloor off the coast of Maui. The site is defined by vertical underwater walls and pinnacles that create a complex topography. Divers and snorkellers can explore depths ranging from 3 to 9 metres, with an average depth of 6 metres. Access is by boat only, as the site is located 2000 metres from shore. Conditions include moderate currents and visibility between 30 and 45 metres. The site is suitable for intermediate divers and offers a snorkel rating of 4 out of 5. Be aware of potential surf and surge when planning your visit.

Halona Blow Hole on Oahu offers a shallow reef and cave dive ranging from 3 to 7 metres. This site features an overhead cave environment that requires intermediate skill levels to navigate safely. Divers experience visibility between 9 and 12 metres with water temperatures ranging from 24 to 27C. Access is via a shore entry that requires caution due to surf, shore break, and sharp coral. Strong currents are common throughout the area, necessitating constant attention during the dive. Parking is available on site, though the area can become crowded on weekends. Typical dive duration is approximately 40 minutes.