Float under the stars as manta rays glide through lit water in Keauhou Bay. This concise guide explains what to expect on Kona’s iconic night snorkel and how to prepare for the in-water encounter.
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Dusk folds over Keauhou Bay and the shoreline dims to silhouetted lava shelves. The boat slips a five-minute distance from shore and a single spotlight throws a column into the black water; tiny plankton glow like stars and, almost inevitably, a winged shadow arrives. Manta rays drift into the light to feed, turning slow, graceful arcs beneath you as you float at the surface.
Difficulty
moderate
Duration
2 hours (includes check-in, briefing, ~30 min in-water)
Fitness Level
Moderate fitness; must be able to swim, tread water and climb a ladder back to the boat
Wildlife
History
Keauhou Bay sits on relatively young volcanic flows; the abrupt reef edges and channels formed as lava met ocean, creating feeding grounds that attract plankton and mantas.
Conservation
Local operators emphasize minimal disturbance: lights are used to attract plankton (not the animals), and visitors are briefed to avoid touching wildlife and reef to reduce impact.
Reserve your spot on the Manta Ray Night Snorkel at Kona, Big Island today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Arrive at check-in time
Tour time on your ticket is the check-in time; departures are typically an hour later—don’t arrive early or late.
Use reef-safe sunscreen
Apply sunscreen before check-in to protect reefs and eliminate greasy reapplication aboard the boat.
Be comfortable in dark, deep water
This is open-ocean night snorkeling; you must be able to tread water and stay calm in low visibility.
No fins on board
Operators prohibit fins for this tour—practice slow kicking and buoyancy control with the gear provided.
Swimsuit and quick-dry top
Wear under the provided short-sleeve wetsuit top for thermal comfort and easy boarding.
Reef-safe sunscreen
Protects coral and reduces the need to reapply on the boat.
Towel & dry bag
A towel for post-snorkel and small dry bag to keep phone/keys safe during the trip.
Lightweight water bottle
Hydrate before and after the tour—space on the boat is limited so bring a small bottle.