Koh Tachai, North Reef

Best months: Jan–May

Protected Area

Mu Ko Similan

Why dive here

With 173+ marine species recorded in the area - including blacktip reef sharks, eagle rays, giant moray eels, whale sharks and clownfish - Koh Tachai, North Reef offers some of Similan Islands's richest reef diving. Water ranges 29-31°C, warmest April, May, June.

Best timeJan–May

WetsuitA 3mm shorty or thin full wetsuit

Marine lifeBlacktip Reef Sharks, Eagle Rays, Giant Moray Eels, Whale Sharks and Clownfish · 173+ species recorded

Water29-31°C · warmest April, May, June

CharacterReef dive · max 21m

StandoutExceptional marine biodiversity

We like Koh Tachai's North Reef for a relaxed afternoon dive, especially after the deeper, more exposed South Plateau. It's a calmer spot, a gentle slope down to 21 meters, usually with mild currents. You'll find plenty of smaller reef fish here, like parrotfish grazing the corals and anemonefish darting through their homes. It's a good choice for newer divers or those who prefer a less strenuous drift.

Typical Koh Tachai, North Reef Dive Profile

Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

Safety Notes

Depth of 21m - Advanced Open Water certification recommended.

Always perform a 3-minute safety stop at 5m before surfacing.

Today06:1718:1511h 58m daylightGolden hour 17:47

Reviews for Koh Tachai, North Reef

Conditions

Ocean conditions, forecast and tides for Koh Tachai, North Reef

Koh Tachai, North Reef Ocean Conditions

Monthly averages for Koh Tachai, North Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (8.1, 98.3) (6km away)