Best Beaches in Koh Tao | Thailand Beach Guide
Koh Tao: Thailand's Premier Dive Island in the Gulf of Thailand
Koh Tao — "Turtle Island" — is a 21 km² island in the Gulf of Thailand, 80 kilometres north of Koh Samui. Despite its small size, it is one of the world's most famous scuba diving destinations, producing more PADI-certified divers annually than almost anywhere else on the planet. The island's clear, warm water (visibility 20–30 metres), abundant marine life including whale sharks, bull sharks, and hawksbill turtles, and the concentration of dive schools make it the best place in Southeast Asia to learn to dive. The rocky, jungle-covered interior and white-sand coves give the island a raw, adventurous character that distinguishes it from more polished Thai island resorts.
Top Beaches on Koh Tao
Sairee Beach
The main beach on the island's western shore, Sairee is a two-kilometre strip with calm, clear water, dozens of dive schools, beach bars, and restaurants serving everything from Thai street food to wood-fired pizza. This is the social centre of Koh Tao and the right base for divers completing their Open Water course. Sunsets here are outstanding, watched from the beachside bars with a Chang beer in hand.
Haad Tien (Tanote Bay)
A sheltered bay on the island's east coast accessible by dirt track or longtail boat, Tanote Bay has excellent snorkelling with Christmas tree worms, moray eels, and reef sharks directly from the beach. The bay is calm and clear, sheltered by rocky headlands, and backed by jungle. One of the best beaches on Koh Tao for independent snorkellers who want marine life without joining an organised trip.
Shark Bay (Haad Tien)
Despite the name, Shark Bay is named for the blacktip reef sharks reliably seen in shallow water just off the beach — harmless to swimmers and a thrilling sight. The bay is rocky and shallow, not ideal for sunbathing, but the snorkelling is exceptional: turtles, rays, and shoals of parrotfish alongside the sharks. Visit at high tide for the best experience.
Best Time to Visit Koh Tao
The best time to visit is March to October, when the Gulf of Thailand's dry season brings calm seas and excellent diving visibility. June and July are particularly good — warm, calm, and before the European summer peak. November to February can see rough weather and occasional storms, with some beaches becoming inaccessible. January is the worst month for diving conditions. Water temperature stays between 28–30°C year-round.
Getting There and Where to Stay
Koh Tao is reached by high-speed catamaran or overnight ferry from Chumphon (mainland), Koh Samui, or Koh Phangan — the journey from Chumphon takes 1.5 hours on the fast boat. Browse hotels and dive resorts on Koh Tao and discover more beaches in Thailand for your Gulf of Thailand island hop.