The distinctive underwater sights worth planning around. Descriptions are curated planning info — always verify local access, rules and conditions before you set out.
01
Hanauma Bay
Marine reserve📍 Oahu, south-east shore (Honolulu)
A sheltered snorkeling bay set inside a volcanic crater, its shallow coral reef gradually recovering under careful management — one of the best shore reefs on Oahu and a longtime first-snorkel favourite.
A Marine Life Conservation District: entry requires a same-day reservation and fee, and conservation rules apply to everyone on the reef.
02
Molokini Crater
Marine reserve📍 Maui, in the channel south of the island
A crescent-shaped volcanic crater rising from the sea, its sheltered inner wall a protected marine reserve with unusually clear water and dense reef life. Reached only by boat, which keeps it in exceptional shape.
Boat-access only; mornings are calmest. It's a marine reserve — no touching, no taking.
03
Manta Night Snorkel, Kona Coast
Megafauna point📍 Big Island, west (Kona) coast
After dark, floodlit boards draw plankton — and with them huge manta rays that glide and barrel-roll right in front of snorkelers holding onto the light rig. An awe-inspiring, fully guided night encounter and one of the region's most famous snorkel experiences.
A guided night trip from a boat; operators run strict non-contact rules for the mantas.
04
Kealakekua Bay
Marine reserve📍 Big Island, south Kona coast
A deep, clear bay beneath the Captain Cook monument, famous for its spinner dolphins and rich fringing reef. The steep shoreline puts the best snorkeling by the monument wall, reached by kayak or boat.
A Marine Life Conservation District — the spinner dolphins are protected; keep your distance and never chase or enter the water around them.
05
Honolua Bay
Marine reserve📍 Maui, north-west shore
A protected bay entered from the rocks, with lush coral gardens just offshore in some of Maui's clearest water. Off-limits to fishing and partly seasonal when winter surf rolls through.
A marine reserve; best in calm summer months, and the shoreline entry is over smooth rocks — go early for calm water.
06
Two-Step (Honaunau Bay)
Shore reef📍 Big Island, near Pu'uhonua o Hōnaunau
A superb walk-in access at a sheltered lava shelf — the 'two-step' is a natural staging ledge that drops you straight into gardens of coral and clouds of reef fish, with green sea turtles commonly cruising the shallows.
07
Tunnels Reef & Makua
Shore reef📍 Kauai, north shore
A celebrated north-shore reef with sand channels and lava tunnels running through dense coral, and a long stretch where young green turtles forage. One of Hawaii's best-known shore reef systems.
North-shore winter surf can make conditions rough — aim for calm days (usually summer) and check local conditions.
08
Poipu Beach Park
Shore reef📍 Kauai, south shore
A laid-back, family-friendly beach with easy shore snorkeling off the reef at the east end of the park, where green sea turtles are frequent visitors and the protected bay keeps the water calm.
09
Hulopo'e Bay
Marine reserve📍 Lanai, south shore
Lanai's pristine crescent bay, a marine reserve and marine-life conservation district with calm, clear water and an easy fringing reef alive with fish and turtles. Quieter than Oahu and Maui, and all the better for it.