Current and visibility baseline plus marine-life notes.
Similan boulder maze with strong current and swim-throughs.
Similan boulder maze with strong current and swim-throughs.
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Iconic Similan open-water boulder system with surface-breaking granite, channels, and overhead swim-throughs. Plan it as a seasonal boat dive for confident divers: the site runs deep, current can strengthen fast, and the sheltered edges matter when the water starts moving. The reward is a dramatic rock maze with a real chance of larger pelagics and dense reef life on the protected faces.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
0m - 70m
Depth Note
Surface-breaking granite with a free descent near 25m; channels sit around 18-27m, deeper water reaches 50m+, and one directory lists 70m max.
Best Season
November to April, inside the Similan open season.
Typical Conditions
Exposed open-water boulders, strong current, some surface chop, and clearer water when the sea settles.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Includes caves, arches, and swim-throughs; use appropriate training and maintain safe clearances. Sharks may be present.
Access Restrictions
Seasonal national-park boat access only; plan around park opening dates and operator permissions.
Legal Notes
Observe Mu Ko Similan National Park closures and guide rules; do not plan casual independent access.
Community notes to help plan your visit.
Scuba Diving
Suitable for recreational diving and underwater photography, with caves, arches, and swim-throughs.
Freediving
Not a freedive-first site. Depth, current, and overhead sections make guided scuba the practical choice.
Snorkeling
Only a bonus on very calm days; the exposed rocks are interesting at the surface, but the site is built for scuba.
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
Current and visibility baseline plus marine-life notes.
Protected-park and seasonal-closure context.
Open-water Similan profile covering depth, current, coral structure, and shark/pelagic potential.
Site overview covering exposed conditions, visibility, and general dive setup.
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