Koh Tachai is a pristine tropical island in the Andaman Sea, located about halfway between Phuket and the Similan Islands. It boasts white sandy beaches, crystal clear waters, and abundant coral reefs that make it a popular spot for scuba diving and snorkelling. There are no permanent residents on the island, but it is open to tourists who can stay in private bungalows or go on day trips from nearby resorts. The island is a peaceful retreat for those who want to escape the hustle and bustle of modern life and relax in a stunning natural setting.

From Phuket International Airport, take a taxi or shuttle to the pier in Khao Lak and then take a speedboat to Koh Tachai. The journey takes about 2.5 hours and costs around 1,800 baht per person.

The best time to visit Koh Tachai is from November to April, when the weather is dry and sunny with calm seas.

Koh Tachai has a tropical climate with two distinct seasons. The dry season runs from November to April, with little rain and temperatures averaging around 30°C. The rainy season runs from May to October, with high temperatures and occasional heavy rain and storms.

Private bungalows on Koh Tachai start from around 2,500 baht per night, while day trips from nearby resorts cost around 3,000 baht per person. Luxury accommodations are available on nearby islands such as the Similan Islands.

There are no restaurants or shops on Koh Tachai, so visitors should bring their own food and water. Nearby resorts offer meals as part of their day trips, or visitors can eat at restaurants in Khao Lak.

Koh Tachai is generally considered safe for visitors, with low crime rates and a welcoming local community. However, visitors should be aware of the risks of diving and snorkelling, and take appropriate precautions. LGBT travellers should be aware that Thailand is generally tolerant, but attitudes may vary in rural areas.

Koh Tachai has no permanent residents, but is part of the Mu Koh Similan National Park and is visited by thousands of tourists each year. The local community is largely Muslim and speaks Thai.

Popular activities on Koh Tachai include scuba diving, snorkelling, beach relaxation, and wildlife watching. Visitors can also explore nearby islands such as the Similan Islands or take day trips to the mainland for cultural and scenic experiences.