Beginner Thailand
Koh Tao
A small island that issues an enormous share of the world's dive certifications
An island of about twenty-one square kilometers in the Gulf of Thailand issues a huge fraction of all the diving certifications on the planet every year. It's not because its diving is the best: it's because it has accessible prices, it's warm, easy, and organized for exactly that.
In this profile you'll find out why Koh Tao became one of the world's largest diver-training hubs, what its diving actually offers beyond the courses, when to go, what pinnacles and wrecks are here, and what's worth checking before choosing a course here.
It's where an enormous number of divers get started, and that's exactly why picking the right course matters so much here. It's also a case study in what happens when training volume grows faster than the reef.
Geography and access
Koh Tao is a small island in the Gulf of Thailand, a shallow, warm, sheltered sea, without the currents or swell of the Andaman side.
That combination (water at twenty-eight degrees, shallow depths, sheltered bays, and reasonable visibility) is exactly what makes it easy to learn to dive, and it explains the island's concentration of training centers.
The seabed around the island combines sandy bays and shallow coral with granite pinnacles a bit further offshore, which are the most interesting diving in the area.
There's also a large wreck deliberately sunk as an artificial reef at recreational depth, which has become a regular stop for specialty courses.
Access is by domestic flight to a nearby island or city plus ferry, or by train and bus from Bangkok; there's no airport on the island itself.
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