Horseshoe Reef in Kona is a marine reef site accessible exclusively by boat. The site features a depth range between 6 and 18 metres, with an average depth of 18 metres. Divers can expect mild current conditions throughout the area. The water temperature remains consistent, ranging from 24C to 26C depending on the month. Facilities available in the vicinity include parking, toilets, showers, a dive shop, air fills, equipment rental, and boat charter services. This site is suitable for beginner divers. Please be aware that sharks are present in this marine environment.

Frog Rock in Kona is a diverse marine site featuring a combination of open reef, cave, and cavern topography. Divers typically explore the area at depths between 16 and 18 metres, with visibility ranging from 25 to 30 metres. Water temperatures remain consistent between 25 and 26 degrees Celsius throughout the year. Access to this site requires a boat. Due to variable currents, divers should assess conditions at the surface before navigating the cave and cavern sections. Species recorded around this area include various moray eels, wrasses, surgeonfish, and butterflyfish, alongside slate pencil urchins.

Koai'e Cove is a marine reef site situated at an ancient fishing village in Kona. Divers and snorkellers access the water via a small rocky inlet featuring a coral rubble beach. The site is suitable for intermediate skill levels, with depths ranging from 1 to 9 metres and an average depth of 5 metres. Conditions vary, with visibility between 3 and 15 metres and moderate currents. Hazards include surf, rip currents, and sharp coral. Species recorded around this area include wrasses, yellow tang, flagtail triggerfish, slate pencil urchins, and various moray eels. Typical dives last approximately 45 minutes.

Mahukona, located on the Big Island, offers a diverse underwater environment featuring a natural reef, wreck debris, and artificial reef structures. Suitable for beginners, the site ranges from 1 to 12 metres in depth with an average of 10 metres. Visibility typically spans 15 to 30 metres, supported by mild currents and water temperatures between 25 and 27 degrees Celsius. Divers and snorkellers frequently encounter wrasses and yellow tang, alongside less common species such as redlip parrotfish, moorish idol, and various triggerfish. Shore and boat access are available, though users should exercise caution regarding surf, surge, and sharp coral at the entry point. Night diving is also permitted at this location.

Mahukona Beach Park in Kona is a former shipping port that offers a unique industrial snorkelling experience. The site features remnants of the old pier structure, which act as an artificial reef and wreck site. Divers and snorkellers enter the water via a sturdy ladder on the pier. The area is characterised by depths ranging from 5 to 12 metres, with an average of 8 metres. Visibility typically spans 10 to 20 metres. Due to moderate currents, surf, and potential rip currents, this site is suited for intermediate snorkellers. Boat traffic is a known hazard in the area. Facilities include parking, toilets, showers, and a nearby dive shop for air fills and equipment rental.

Kohala Coast near Kona offers a combination of natural reef and artificial reef structures. Divers can expect depths ranging from 9 to 24 metres, with an average depth of 14 metres. The site is accessible by both shore and boat, featuring mild currents and visibility typically between 15 and 30 metres. Water temperatures remain consistent throughout the year, ranging from 24C to 26C. The site supports night diving and is suited for intermediate divers. Facilities available in the area include air fills, equipment rental, guided tours, showers, toilets, and parking. Hazards to be aware of include boat traffic, deep sections, overhead environments, sharks, and sharp coral.

Outside Crystal Cove in Kona is a reef and pinnacle site accessible only by boat. The topography features a pinnacle with a top at 11 metres and a base at 21 metres, alongside a coral ledge leading toward a black sand cove. Divers can explore coral islands and search for small invertebrates and nudibranchs. Conditions are generally mild, though divers should be aware of potential surf and surge. Depths range from 6 to 21 metres with an average of 16 metres. Visibility at this site is between 2 and 8 metres. Water temperatures remain consistent throughout the year, ranging from 24 to 26 degrees Celsius.

NudiMadness is a shallow reef site in Kona, United States, offering a relaxed shore entry. The site is well-suited for beginners, with depths ranging between 1 and 2 metres. Divers can expect mild currents and visibility typically between 3 and 15 metres. Water temperatures remain consistent throughout the year, ranging from 25C to 27C. Facilities at the site include showers for post-dive rinsing. Hazards to be aware of include surf, sharp coral, sea urchins, and periods of low visibility. The site is ideal for those interested in slow-paced, shallow-water exploration.