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Thailand :: Khao Lak : Richelieu Rock

This world class dive site is probably the best place in Thailand to spot whale sharks however since the last El Nino their numbers have diminished. Sightings are a lot more common during the March to May season. The splintered rock can just be seen above the surface at low tide around 18km east of Koh Surin and huge schools of pelagics can be seen on any given day.

All manner of marine life is in abundance here, octopus and cuttlefish can be spotted along side yellow boxfish, morays and cleaner and mantis shrimps. There are many rock crevaces and cracks for marine life to hide in so take it slow and keep a look out. Also look out into the blue where large schools of snappers, jacks and trevally can be seen circling the rock above the thermoclines. Boat traffic and numbers of divers on the site can be heavy during peak season.

Thailand liveaboard trips

We now also offer liveaboard trips to the Andaman from Thailand, visit the Similans, and world class dive sites of Richelieu Rock, Koh Bon and Koh Tachai from the luxury of a liveaboard, find out more here: Thailand Liveaboards


Depth: 10 - 40m

Viz: 10 - 40m

Currents: Can be strong

Getting there : Liveaboard or speedboat

Best months: Oct to May

Whale Shark

This map is taken from Pocket divesite's guide book: Similans including Koh Bon, Koh Tachai, Richelieu Rock more. Info at


Thailand Liveaboards
Similan islands