Koh Tachai, West 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, West 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 19m

StandoutExceptional marine biodiversity

Koh Tachai, West Reef is a good spot to relax and take it slow, especially if you’ve spent a few days battling currents on some of the other Similan sites. It’s pretty shallow, topping out at 19 metres, making it an easy dive for newer divers or those who just want to extend their bottom time. We usually find it’s home to a good variety of the usual reef suspects – lionfish hovering under ledges, schools of snapper, and plenty of anemonefish darting amongst their homes. It’s a comfortable dive, not one to set any records, but consistently pleasant.

Typical Koh Tachai, West 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 19m - 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, West Reef

Conditions

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

Koh Tachai, West Reef Ocean Conditions

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