Tachai Islands or Koh Tachai is located on the northest of Similan Islands National Park. Tachai Island lies between Similan Islands and Surin Islands. This is one of the best dive sites in Thailand. With plenty of marine life and coral there is always the chance of spotting something larger such as leopard sharks, sea turtles, manta rays, nurse sharks and more.

Tachai Island offers stunning white sandy beaches, crystal clear waters and an amazing marine life great for snorkeling. Koh Tachai is a small uninhabited island reachable in one hour from Khao Lak. Tachai Island Tour include Snorkeling at The Anemone Reef, where Nemo Crown Fish and turtles are often sighted. A delicious picnic lunch will be served on the island. After lunch have a nature walk to find and observe Chicken Crabs and Giant Helmet Crabs or just sunbath and relax on the stunning white sandy beach.

Tachai Island Normally Only Open from 15th Oct til 15th May.