The Best Dive Sites - Thailand
Koh Bon - The Pinnacles
Koh Bon – Pinnacles
At a Glance
• Max depth: 40+ meters
• Level of difficulty: Advanced open water upwards.
• Visibility: 10/40 meters
• Current: Moderate to strong
• Season: October through June
Koh Bon - The Ridge, one of the best dive sites in Thailand, is a large island to the north of the Similan Islands and both Liveaboards and Day Trip Boats come here – it is known as one of the best dive sites for large pelagics.
Koh Bon - Pinnacles, one of the best dive sites in Thailand, is a great dive site just off Koh Bon and a little north of the Similan Islands and both Liveaboards and Day Trip Boats come here – it is known for amazing underwater action -a quick dive yet unforgettable.
Just about 500 metres North West of the West Ridge there is a series of submerged pinnacles. This is not marked with a mooring line but can easily be found with a depth finder.
It is popular as a morning dive from the Liveaboards of Phuket and Khao Lak and can also be dived from a day trip speedboat.
The shallowest part of the dive site is approximately down at 18 metres, this site gets deep quickly and the currents can be wicked, dropping off to more than 45 metres on the Northern side.
Because of the depth, it is usually the first dive of the day. The dive site itself is fairly small and a negative entry is usually required to get down quick, otherwise, you can be blown off course. You need to descend fairly quickly to avoid missing the site.
There are 2 pinnacles, the southern one being the shallower. The shallowest part of the northern pinnacle is around 28 metres. Currents can be very strong here and around full and new moon the site is very challenging.
There is a fair chance to see large Leopard Sharks which can be spotted sleeping in the sandy areas below, keep your eyes peeled for White Tip Reef Sharks in the deeper water.
There is always a lot of mid-water activity here with some very large Rainbow Runners, Barracuda, Trevallies and schools of Fusilier's hunting, it can be a little chaotic with so many fish flying all over the place, and where to look next can be the problem.
The eastern side is far shallower gradually and drops to around 32 metres. On the site itself, there are some Giant Morays, Octopus, Oriental Sweetlips, several species of Angel Fish, Butterfly Fish, Peacock Mantis Shrimps, Lion Fish, Scorpion Fish.
Due to the depth of the dive site, it is usually a quick dive, I can assure you this though it is one of the most exhilarating dives you will ever do. You can normally expect a maximum dive time of around 35 minutes only, without going into decompression.
I have seen some huge marble rays here too, absolutely massive, cruising over the site like a UFO’s.
If you remain on the Pinnacle you may be rewarded with a Manta Ray or Eagle Ray. If you make the swim back to the West Ridge lookout for Leopard Sharks sleeping on the sand below you or a Manta/Eagle Ray passing you.
If set your compass to South East you should land on the West Ridge on its Northern side. Swim in the mid-water as the bottom is in excess of 30 metres until there.
This site can be challenging due to the depth and the currents. It is recommended only for experienced divers