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West-reef slope, coral blocks and visibility range.
Dive Spot Guide•
Koh Tachai, West Reef
Current-prone granite reef on Koh Tachai's west side.
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Boat-based Similan dive with current-prone granite relief, best as a liveaboard or organized day-boat stop for confident divers.
About Koh Tachai, West Reef
Koh Tachai, West Reef is a granite-boulder reef on the island's west side, prized for current-driven fish action and a lively coral garden. The profile mixes coral blocks, fan-covered rocks, and sloping sand, so the dive rewards a controlled descent and a steady, unhurried pace. It is a boat-based Similan stop best suited to confident divers during the open season, especially when the current helps the reef feel more alive.
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Research Estimate At Koh Tachai, West Reef
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 20m
AccessChallenging entry effort
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesNo facilities
Crowd / PopularityFew visitors
CurrentStrong current
Where Is Koh Tachai, West Reef?
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Community sourced coordinates.
Koh Tachai, West Reef Planning Details
Depth range, seasonality, and planning context.
Reported Depth
12m - 40m
Depth Note
Coral garden and reef structure described from 12–40 m.
Best Season
November to April
Typical Conditions
Strong currents can occur and are a key feature of the site.
Safety & Access At Koh Tachai, West Reef
Hazards, restrictions, and access requirements.
Key Hazards
Strong current
Safety Notes
Strong currents are common; plan dives for current, stay with the group, and use appropriate procedures for mid-water ascent if needed.
Access Restrictions
Boat access only; this is not a shore-entry site, and the island beach is not a casual stop between dives. Non-diving day trips are a poor fit.
Legal Notes
Mu Ko Similan National Park closes each year from May 1 to October 31, so plan this for the November-April season. Follow park rules for moorings and no-landing limits.
Local Intel For Koh Tachai, West Reef
Community notes to help plan your visit.
Scuba Diving
Granite boulder formations with coral growth create a pinnacle-style dive spanning roughly 12–40 m.
Freediving
Not a natural freedive target. The depth, current, and boat-entry setup make it a scuba-first site.
Snorkeling
Not a snorkel-first site. The reef is best from underwater, and the closed beach means no casual shore snorkel stop between dives.
Wildlife at Koh Tachai, West Reef
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Koh Tachai, West Reef
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Koh Tachai, West Reef
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility20m
Activity
No dive activity logged yet.
