Liveaboard page with current-dependent drop points, depth, and visibility context.
Manta ridge with strong current and big pelagic life.
Manta ridge with strong current and big pelagic life.
A current-aware guide is important because the ridge is unprotected and the drop point changes with flow.
A classic Koh Bon West Ridge dive with a long limestone shoulder, healthy hard and soft coral, and a current-dependent drop point that can turn the site into a flowing drift. The ridge is famous for manta-cleaning-station behavior and big-pelagic passes, with clear water, dense reef fish, and enough structure to reward slow, careful ridge work.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
8m - 35m
Depth Note
West Ridge starts around 8 m, the wall reaches 20-25 m, and the ridge continues to about 35 m.
Best Season
October to May, with peak manta chances February to April.
Typical Conditions
Boat-drop ridge dive with strong current, clear water, and manta-cleaning-station action on the west side.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Stay with the guide, keep off coral, and watch depth on the ridge and wall sections.
Legal Notes
Similan Marine Park closes during the western monsoon, typically early May to mid-October.
Community notes to help plan your visit.
Scuba Diving
Best for divers comfortable with current, depth control, and ridge-style navigation.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Liveaboard page with current-dependent drop points, depth, and visibility context.
Dive-center page with peak manta season and reef-life notes for Koh Bon West Ridge.
Official Koh Bon directory entry for broad tourism and park context.
Operator page for Koh Bon West Ridge with current, coral, manta, and shark context.
Exact West Ridge page with depth, visibility, current, coral, and marine-life details.
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