Koh Tachai, Ao Lek

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, Ao Lek offers some of Similan Islands's richest 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

Charactermax 17m

StandoutExceptional marine biodiversity

Koh Tachai’s Ao Lek offers a gentle introduction to the Similans, a welcome change from some of its more intense neighbours. Dropping to a comfortable 17 metres, it’s a spot we often suggest for newer divers or those wanting a relaxed second dive. You’ll drift along slopes dotted with hard corals, keeping an eye out for schools of snapper hugging the reef. We’ve had some lovely encounters here with turtles grazing, unbothered, and it’s a great place to spot anemonefish tending their homes. It’s not about big pelagics, but rather a chance to slow down and appreciate the smaller details.

Typical Koh Tachai, Ao Lek Dive Profile

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

Safety Notes

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

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

Reviews for Koh Tachai, Ao Lek

Conditions

Ocean conditions, forecast and tides for Koh Tachai, Ao Lek

Koh Tachai, Ao Lek Ocean Conditions

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