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Hanauma Bay Sea Cave or "Big Sea Cave" is a boat accessible salt water dive site, located in Oahu, HI. This dive site has an average rating of 4.38 out of 5 from 8 scuba divers. The maximum depth is 51-60ft/16-18m. The average visibility is 91-100ft/28-30m.

This is a boat dive around the corner from the Hanauma Bay. (normally leaving from Koko Marina) The water here here is normally very ruff. Makes it a little difficult to gear up. But well worth the trouble. Directly in front of the cave the water is about 50ft., but drops down to 90’+ farther out. Inside the cave the is bright, the center on the cave has a very large natural skylight. (much darker on the edges) Inside the cave you can find turtles, whitetip reef sharks and lots of small fishes. A very cool dive! If the water is real ruff, you can hear it crashing and it sounds like thunder.


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Winterone - 11/27/2015 10:16 AM
Rating Added: 5
Sea was a bit ruff but the dive was incredible. Would highly recommend it to the intermediate diver as a must do. Not a cave or over head environment as such but gives you a wonderful large swim through experience.