Koh tachai beach

Koh Tachai diving day trip

Diving day trip from Khao Lak to Koh Tachai

Koh Tachai has been our favourite dive site in Thailand for the last couple of seasons. As well as great diving it has an amazing beach leading some to dub Koh Tachai as the Maldives of Thailand. Koh Tachai diving is for experience divers only.

Koh Tachai diving day trips are available several times per week from Khao Lak between the months of November and April. The price varies depending on which boat is used. These trips tend to fill up quickly, early booking is recommended.

Schedule and prices

2 dives. 4,600 baht per diver

3 dives (1 dive at Koh Tachai, 2 dives at Koh Bon). 5,500 baht per diver

2 dives. 4,600 baht per diver

2 dives. (1 dive at Koh Tachai, 1 dive at Koh Bon). 4,700 baht per diver

Price include: round trip transfers from Khao Lak hotels, lunch, drinking water, tanks, weights, dive guide.

Not included: national park fees (700 baht per diver), equipment rental, 15 litre tank, transfer from Phuket.


Koh Tachai diving

Koh Tachai diving / เกาะตาชัยKoh Tachai lies 25km north of Koh Bon, about 60km north of the Similan Islands.  From November to April when the sea conditions are suitable Koh Tachai can be reached by day trip diving/snorkeling speed boat from Khao Lak or by liveaboard dive boat from Phuket or Khao Lak.

Koh Tachai is part of the Similan Islands national park so there is a park entrance fee and diving fee payable.

Koh Tachai plateau is a great dive with manta rays, reef sharks, leopard sharks, beautiful corals, anemones and sea fans. Whale sharks can also be seen, we used to expect to see manta rays at Koh Tachai but in recent seasons we’ve been seeing more whale sharks as well.

If the manta rays don’t appear divers can occupy their dive time by spotting critters such as ribbon eels, frog fish and nudibranchs.

Koh Tachai is not an easy place to dive, currents can be very strong. For divers with experience it is worth it if the pelagics are there. It is often necessary to hang on to the fixed mooring line for descents and ascents. Diving at Koh Tachai often requires slowly weaving your way around the rocks looking for shelter from the current.

There is also an easy and shallow reef off the east coast of Koh Tachai that offers for excellent snorkeling and a good night dive in sheltered conditions.

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