Community guide with liveaboard access, park-fee context, current behavior, and site-fit notes.
Thailand · Khao Lak (Similan and Surin Islands)
Boat-only pinnacle reef with big pelagics and current.
Boat-only pinnacle reef with big pelagics and current.
Richelieu Rock is a boat-only pinnacle reef in Mu Ko Surin National Park, known for coral-covered slopes, strong-water timing, and frequent pelagic sightings. Plan for operator-led logistics and a site that rewards calm-weather windows.
Site Conditions
Safety Notes
Sharks are commonly seen and whale sharks may be present; maintain appropriate distance and situational awareness.
Access Restrictions
Located within Surin Islands National Park.
Legal Notes
Inside Mu Ko Surin National Park, so park fees and seasonal park-opening rules apply; follow operator and ranger instructions.
Community notes to help plan your visit.
Scuba Diving
A boat-only pinnacle reef with coral-covered slopes and current-sensitive profiles; best for divers comfortable with live-boat timing.
Freediving
Not a practical freedive target: remote boat access, current-sensitive timing, and open-water exposure make it a scuba-first site.
Snorkeling
Not a normal snorkel site; conditions are set up for scuba boats rather than casual shallow-water visits.
Species commonly reported at this site, with direct links into their wildlife guides.
Conservative research baseline blended with 1 dive by 1 diver.
1 community dive logs and visit reports for this site.
Last Updated
Research Sources
Community guide with liveaboard access, park-fee context, current behavior, and site-fit notes.
Park page with Richelieu Rock location, park-season context, and site description.
Operator page covering access from Khao Lak, strong currents, visibility, and marine life.

Koh Tachai, Ao Lek is a remote Andaman drift dive with coral blocks.

Deep Similan pinnacle with manta-ray potential

Beginner-friendly boat reef on Koh Bon's North Reef.