Koh Bon Pinnacle, Similan Islands - Thailand Dive Sites

Koh Bon Pinnacle is a deep dive site in the Similan Islands that feels utterly remote – and where anything could show up out of the blue.

B over the yellow corals, Koh Bon Pinnacle, Similan Islands, Thailand April 2023 © chris@divehappy.com

While it’s located only a couple hundred metres from the shoreline of Koh Bon island, Koh Bon Pinnacle feels like it’s in the middle of nowhere.

Batfish, Koh Bon Pinnacle, Similan Islands, November 2024 © chris@divehappy.com

It’s a fairly small, deep pinnacle with its highest point at 12 metres but the majority of the pinnacle’s huge slabs of rock starting at 20 metres.

Filefish around fan coral, Koh Bon Pinnacle, Similan Islands, Thailand, May 2024 © chris@divehappy.com

Usually only dived when the visibility is good, seeing the site below you as you descend feels like skydiving towards some lost temple in the jungle, thanks to the bright yellow soft coral growth that covers the pinnacle’s jutting rocks.

Pook and the yellow coral, Koh Bon Pinnacle, Similan Islands, Thailand, December 2024 © chris@divehappy.com

You can easily see one side of the pinnacle from the other, and looking out into the blue feels suitably panoramic.

As it’s so near to Koh Bon, manta rays have been known to fly over the pinnacle but it’s not really a hotspot.

Hundreds of batfish, Koh Bon Pinnacle, Similan Islands, November 2024 © chris@divehappy.com

The resident batfish are always good value hovering around the lower ledges of the plateau and big batfish schools hundreds strong sometimes pass by in the blue.

When the water temperature drops, big marble rays can often be spotted on the edges of the pinnacle before the sheer drop down into the depths.

Sea snake, Koh Bon Pinnacle, Similan Islands, Thailand, MAy 2024 © chris@divehappy.com

Amongst the corals covering the pinnacle’s rocks there’s the usual tropical fish suspects and the occasional sea snake.

Yellow coral and diver, Koh Bon Pinnacle, Similan Islands, Thailand April 2023 © chris@divehappy.com

Koh Bon Pinnacle is one of the most atmospheric and individual looking dive sites you can dive on a similar liveabaord. The conditions have to be right – good viz to see it properly and not too much current otherwise you risk getting blown off the site before you even reach the rocks. If all goes to plan, it’s a beautiful and memorable spot to explore.