Dive-site story
Located off Haleiwa Beach Park on Oahu's North Shore, Haleiwa Trench is a distinct underwater canyon cutting through the surrounding basalt and coral reef flat. Divers follow the sandy bottom channel out towards deeper blue water, where rocky walls and undercut ledges provide shelter for resting animals. Summer brings calm conditions and easy navigation along the trench's defined perimeter.
Well-defined underwater canyon topography with undercut volcanic ledges
Resting whitetip reef sharks along the sandy trench floor
Frequent encounters with green sea turtles along the shallow reef shoulders
Location
Use the map to plan with your operator and confirm the exact entry point on the day.
Seasonality
Summer offers flat water on the North Shore. Winter swell activity produces dangerous surf that closes the site entirely.
Marine life
| Species | Likelihood | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Whitetip reef sharkTriaenodon obesus | Common | ||||||||||||
| Green sea turtleChelonia mydas | Common | ||||||||||||
| Spotted eagle rayAetobatus narinari | Seasonal | ||||||||||||
| Undulated moray eelGymnothorax undulatus | Common | ||||||||||||
| Hawaiian reef octopusOctopus cyanea | Common |
Marine forecast
