Richelieu Rock

Widely regarded as Thailand’s top dive site and one of the finest in the world, Richelieu Rock is the ultimate highlight of any Thailand liveaboard diving itinerary. Situated in the open sea within the Surin Islands National Marine Park, this isolated limestone pinnacle rises from the depths to just beneath the surface, forming a vibrant horseshoe-shaped reef absolutely teeming with marine life.

Richelieu Rock is famed for its incredible biodiversity and jaw-dropping underwater landscapes. This is one of the few dive sites in Thailand where you can enjoy macro photography and pelagic action on the same dive. The coral-encrusted rock is home to everything from harlequin shrimp, seahorses, and ornate ghost pipefish to swirling clouds of fusiliers, snappers, and barracuda.

From February to April, Richelieu Rock also offers a high chance of spotting whale sharks—the gentle giants of the sea. These plankton-feeding sharks are often seen cruising slowly through the area, making for an awe-inspiring encounter that many divers dream of. Manta rays, marbled groupers, cuttlefish, and even torpedo rays also frequent the site, making every dive a new adventure.

Currents at Richelieu Rock can vary, offering both relaxed and exhilarating dive profiles. With DiveRACE liveaboard, you’ll be guided by expert dive leaders who know how to time entries and navigate the pinnacle safely, ensuring that each diver—from intermediate to experienced—can enjoy the site to the fullest.

Thanks to its remote location, Richelieu Rock is only accessible by Thailand liveaboard diving trips, making it a true hidden gem for those willing to go the extra mile. The reward? A kaleidoscope of marine life and a truly unforgettable diving experience.

Don’t miss the chance to explore Richelieu Rock with DiveRACE—book your Thailand liveaboard diving trip today and dive into one of Asia’s most iconic underwater sites.

Get to know Richelieu Rock before your trip, and why it's one of the top dive sites in the world, with our Dive With us series: Richelieu Rock.