Community dive-site page for Secrets Reef / Horseshoe Reef.
United States of America · O'ahu, Hawai'i
Secrets Reef is an Oahu reef with sharks, turtles, and coral.
Secrets Reef is an Oahu reef with sharks, turtles, and coral.
Secrets Reef is an Oahu south-shore reef off Kaka'ako Waterfront Park and the Point Panic area, with an oblong H-shaped profile, a turtle-cleaning station, and healthy coral on the reef top. The site is usually approached from the shore or by boat depending on conditions, and the main planning issue is staying clear of the nearby boat channel while choosing a calm window for entry and exit. It is a relaxed but active reef dive for people who want sharks, turtles, eels, and occasional eagle-ray or manta fly-bys without leaving Honolulu. The reef is popular with divers who like a simple navigation target, good wildlife odds, and a site that can be enjoyed as an unhurried daytime dive or a night dive when conditions and local rules allow.
Site Conditions
Safety Notes
Use a dive flag or SMB discipline, stay clear of the boat channel, and do not push the site on rough days when the entry and exit get messy.
Access Restrictions
Secrets Reef is a shore-accessible south-shore site, but divers should keep out of the marked boat channel and time entry and exit around surf and current.
Legal Notes
This is an active waterfront dive area near a boat channel, so local surfacing and channel-avoidance etiquette matter more than a permit barrier.
Community notes to help plan your visit.
Scuba Diving
An easy scuba dive with a max depth of about 15 m (50 ft).
Freediving
Freediving is limited to the calm shallow reef top and is not the normal way to work Secrets Reef.
Snorkeling
Snorkeling is possible in calm conditions, but the site is much better as a scuba dive because the reef sits in a channel-influenced area.
Research estimate
Research estimate
Research estimate
Research estimate
Research estimate
Last Updated
Research Sources
Community dive-site page for Secrets Reef / Horseshoe Reef.
Operator dive map with the site coordinates and shore-or-boat access labeling.
Independent south-shore guide covering Secrets Reef, current, boat traffic, and entry cautions.

Popular Oahu reef dive with coral, sharks, and clear water.

Macro pipe-and-reef dive with shrimp, nudibranchs, and eels.

Honolulu pipe reef with busy harbor traffic and lots of critters.