Koh Bon ranges from 15 to 40 metres and is suited to advanced divers. It is a wall dive with moderate–strong current.

When is the best time to dive Koh Bon?

The season is Oct 15 – May 15. Expect 15–30 m visibility and 27–29 °C water.

How do you get to Koh Bon?

Liveaboard · Khao Lak. It is in the Similan Islands area at 8.8275° N, 97.7955° E.

What marine life can you see at Koh Bon?

Manta ray, Leopard shark, Eagle ray, Barracuda. Highlights include west ridge manta highway; sheer limestone wall; deep pinnacle for the brave.

← Dive mapAdvancedWallSimilan Islands

Koh Bon

Depth

15–40 m

Visibility

15–30 m

Water

27–29 °C

Current

Moderate–Strong

Season

Oct 15 – May 15

Getting there

Liveaboard · Khao Lak

Coordinates

8.8275° N, 97.7955° E

Verified

2026-09-12

The Andaman's most reliable manta site. Hang on the West Ridge in 20 m, look out into the blue, wait.

Highlights

West Ridge manta highway
Sheer limestone wall
Deep pinnacle for the brave

What you'll see

Manta rayLeopard sharkEagle rayBarracuda

Photos: Jean-Paul Boerekamps, luluchouette via Wikimedia Commons · licences

Similan Islands — Andaman Sea scenery near Koh Bon

Field footage · Andaman Sea

What the diving looks like.

Original footage from Andaman dives, chosen to match the wall terrain and marine life you can expect at Koh Bon.

Reef slope into the blueFollowing the contour of a coral slope as it drops away into open water, the kind of edge where the big animals pass.29 Nov 2025

Koh Bon, in brief

How deep is Koh Bon?: Koh Bon ranges from 15 to 40 metres and is suited to advanced divers. It is a wall dive with moderate–strong current.
When is the best time to dive Koh Bon?: The season is Oct 15 – May 15. Expect 15–30 m visibility and 27–29 °C water.
How do you get to Koh Bon?: Liveaboard · Khao Lak. It is in the Similan Islands area at 8.8275° N, 97.7955° E.
What marine life can you see at Koh Bon?: Manta ray, Leopard shark, Eagle ray, Barracuda. Highlights include west ridge manta highway; sheer limestone wall; deep pinnacle for the brave.

Pack for this dive

Gear we'd bring to Koh Bon

Night dive

Bigblue

Bigblue AL1200NP Torch

Bright enough to find the cuttlefish, small enough to live in a BCD pocket all trip.

$129Scuba.com ↗

Widest view

TUSA

TUSA Paragon Mask

Whale sharks at Richelieu Rock go past fast. The Paragon's field of view is the difference between seeing it and seeing its tail.

$229Scuba.com ↗

Permanently sealed

SeaLife

SeaLife Micro 3.0

Nothing to flood. Sealed at the factory, so the only thing you think about at Anemone Reef is the clownfish.

$599Scuba.com ↗

Trips that diveKoh Bon

Liveaboard
Similan Islands Liveaboard · 4 Days
Four days, fourteen dives, one route north from the Similans to Richelieu Rock. The single best diving week you can buy in Thailand.
from $890 · via PADI TravelBook →Details
Liveaboard
Richelieu Rock Express · 2 Days
Short on time, long on ambition. Koh Bon, Koh Tachai and Richelieu Rock in two days out of Khao Lak.
from $520 · via PADI TravelBook →Details

Next siteKoh Tachai