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.

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.

Kamalo Wharf on the south shore of Maui offers access to a massive fringing reef and an artificial reef environment created by pier pilings. Divers and snorkellers can explore the reef wall and the structure of the wharf, which supports a variety of tropical reef fish and invertebrates. The site is suitable for intermediate divers, with depths starting at one metre. Access is available from both shore and boat. Conditions are generally mild, though visitors should be aware of potential rip currents and sharp coral. Water temperatures remain consistent throughout the year, ranging from 25C to 27C.

Puko'o Beach on Maui is a shallow, sheltered site defined by a wide reef flat and seagrass beds. The area is suitable for beginners, offering a calm environment for shore entries. Visibility at this location typically ranges from 12 to 40 metres, with water temperatures fluctuating between 24C and 27C throughout the year. Currents are generally mild, though divers and snorkellers should remain aware of potential hazards, including jellyfish, sea urchins, and sharp coral. The site provides a accessible coastal experience for those seeking shallow water exploration.

Kumimi Beach, also known as Murphy's Beach or 20 Mile Beach, is a shore-accessible reef site on Molokai. This location is suitable for beginners and offers a shallow reef environment. Entry is made directly from the golden sand beach. Conditions vary, with mild currents and potential surf. Divers and snorkellers should be aware of hazards including sharp coral and strong currents. Water temperatures range from 24C to 27C throughout the year. Parking is available for visitors at this site.

Halawa Bay is a reef site located at the end of the road in the historic Halawa Valley. Snorkelling takes place along the rocky edges of the bay. The site is suitable for intermediate snorkelers, with depths ranging from 1 to 10 metres and an average depth of 5 metres. Access is via the shore. Conditions vary, with visibility typically between 3 and 15 metres. Hazards include surf, rip currents, and strong currents, particularly when swell is present. Facilities available at the site include parking, toilets, showers, changing rooms, and a rinse station. Water temperatures range from 24C to 27C throughout the year.

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.

Moku Ho'oniki is a boat-access site located off the eastern tip of Molokai, featuring a complex topography of reefs, walls, pinnacles, and caves. Divers encounter depths ranging from 5 to 100 metres, with an average depth of 60 metres. This site is suitable for advanced divers due to strong currents and the potential for decompression, nitrogen narcosis, and overhead environments. Visibility typically ranges from 15 to 45 metres. Water temperatures remain between 21 and 24C throughout the year. Access is strictly by boat, and divers must be prepared for hazards including boat traffic, entanglement, and surf.