Similan Islands · Thailand · Pinnacle · Pelagic & blue water
Koh Bon Pinnacle
Unmarked deep pinnacle where mantas and leopard sharks turn up
Area photo: Reinhard Link · CC BY-SA 2.0
Koh Bon Pinnacle is a submerged rock off Koh Bon with no mooring line, its top at about 18 m and its north face falling away past 45 m. It is a place to look for manta rays and leopard sharks, and its currents can be strong, which keeps it a dive for experienced groups.
Also known as Ko Bon Pinnacle.
Where it is and how deep
8.8322° N, 97.7955° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
Boats find the pinnacle with a depth finder rather than a buoy, and divers go down onto its shallowest part at about 18 m. The north side drops off steeply into deep water. On the south side a long swim at 28-30 m leads across to the main island reef.
Marine life and season
- Manta rays
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Prime | Prime | Prime | Prime | Fair | Off-season | Off-season | Off-season | Off-season | Fair | Good | Prime |
Season follows Similan Islands: The park is closed by law from mid-May to mid-October; December to April is the calm high season.
Know before you go
- Currents at the pinnacle can be strong, and around full and new moon the site can be challenging.
Dive videos
Diving in Thailand Koh Bon Pinnacle by Planète Immersion · planeteimmersion on YouTube
Questions divers ask
Is Koh Bon Pinnacle marked with a mooring line?+
No. The pinnacle has no mooring line; boats find it with a depth finder, and divers descend to its top at about 18 m.
Sources
- Ko Bon Pinnacle — Indepth Dive Centre Phuket
- Koh Bon Pinnacle — ScubaGo
- Koh Bon Island Dive Sites — Sunrise Divers Phuket
More dive sites in Similan Islands
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Wreck
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Reef
Longest reef in the Similans, over 300 coral species
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Coral garden
Morning light on a shallow coral garden off Ko Bangu
Reef
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Granite arches at the exposed north end of the chain
Drift
Strong-current ridge with soft coral gardens and big boulders
Similar dives elsewhere
Offshore granite tower where barracuda and jacks school in the blue
A current-swept pinnacle from 30 m to within 5 m of the surface
Seamount summit 2 m under the surface, coated in soft coral
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Occasional whale sharks and manta over a 45 m pinnacle