About Revisions Hanauma Bay Sea Cave or "Big Sea Cave" Oahu, HI Max Depth: 51-60ft/16-18m Average Viz: 91-100ft/28-30m Entry Type: Boat Bottom Composition: Rock Fall: 76-80°F/24-27°C 7/17/2009 11:05 PM

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.