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Dive Spot Guide•
Koh Tachai Pinnacle/The Dome
Strong-current pinnacle dive with a dome-shaped reef and big fish.
Local operator required
This is a liveaboard or charter dive in protected park waters, so local operator logistics are the practical route.
An advanced Andaman reef off Koh Tachai with a dome-shaped granite pinnacle, mooring-line descents, and strong current that draws pelagics.
About Koh Tachai Pinnacle/The Dome
Koh Tachai Pinnacle, also called The Dome, is a boat-access reef off the south side of Tachai Island in the Similan protected area. The site centers on a dome-shaped granite pinnacle with surrounding boulders and coral slopes that drop into deeper water. Strong currents, regular pelagic traffic, and the chance of big-animal encounters make it a classic advanced Andaman dive for experienced teams.
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Research Estimate At Koh Tachai Pinnacle/The Dome
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 25m
AccessChallenging entry effort
CoralHealthy coral
Aquatic LifeExceptional variety
FacilitiesLimited facilities
CurrentVery strong current
Where Is Koh Tachai Pinnacle/The Dome?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Koh Tachai Pinnacle/The Dome Planning Details
Depth range, seasonality, and planning context.
Reported Depth
12m - 35m
Depth Note
The dome starts around 12 m and slopes to about 35 m on the deeper side.
Best Season
October to May
Typical Conditions
Strong currents, open-water exposure, and good visibility in season.
Safety & Access At Koh Tachai Pinnacle/The Dome
Site conditions, restrictions, and access requirements.
Site Conditions
Strong current
Safety Notes
Plan the descent and ascent on the line, and do not treat the site like a relaxed reef drift. Current can change fast, so timing and buoyancy matter.
Access Restrictions
Boat access only within protected park waters; seasonal park access applies.
Legal Notes
Mu Ko Similan National Park protections apply, including seasonal opening dates and operator rules.
Local Intel For Koh Tachai Pinnacle/The Dome
Community notes to help plan your visit.
Scuba Diving
A dome-shaped pinnacle with mooring-line descents, boulder fields, coral slopes, and strong current.
Wildlife at Koh Tachai Pinnacle/The Dome
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Koh Tachai Pinnacle/The Dome
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Koh Tachai Pinnacle/The Dome
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility25m
Activity
No dive activity logged yet.
