www.easydaykhaolak.com · Operator
Current and mainland-access context.
Easy Similan reef with shark sightings and healthy coral.
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Koh Tachai, North Reef is a boat-only reef dive on the eastern side of Koh Tachai in the Similan Islands, with a long hard-coral slope that rolls into sand. It is known for relaxed, beginner-friendly dives when conditions are calm, but it is still a seasonal Andaman site where park access, tidal current, and boat logistics shape the plan. Leopard sharks on the sand, barracuda, trevally, and reef fish are the main draw, and the site is also used for night dives when conditions allow.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
5m - 30m
Depth Note
Sloping hard-coral reef down to a sandy bottom around 5–30 m.
Best Season
November through April, when the Similan season is open and sea conditions are calmest.
Typical Conditions
Easy, relaxing sloping reef when the sea is calm, but current can build and night dives are also common.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Use a guide or experienced operator when currents build, and treat the site as a boat-only reef inside a seasonal national-park framework.
Access Restrictions
Boat-only access; the Similan National Park closes from May to October.
Legal Notes
Koh Tachai is part of the Similan National Park, so access follows park season and operator rules.
Community notes to help plan your visit.
Scuba Diving
Suitable for beginners and also mentioned as a good site for night dives.
Freediving
Not a freedive-first site; it is primarily a boat-scuba reef with current and park timing to manage.
Snorkeling
Some calmer shallow reef sections can work for snorkelers, but North Reef is primarily a scuba boat-dive site.
Use the planner to scan this week, inspect today in local time, and understand how exposure shapes conditions at Koh Tachai, North Reef.
Directional shelter context for incoming swell.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
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Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Current and mainland-access context.
Day-trip access and coral context.
Official park season and access context.
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