The Surin Islands form an archipelago of five islets — Ko Surin Tai, Koh Surin Nuea, Ko Klang, Ko Kai and Ko Ri — set in the Andaman Sea, 55 km off the coast of Phang Nga province. Administratively part of Khura Buri district, the archipelago is integrated into the Mu Ko Surin maritime national park and remains one of the most pristine sites on Thailand's west coast. Its waters shelter one of the country's richest coral ecosystems, and its indigenous Moken population perpetuates an ancient maritime way of life.

Why visit the Surin Islands

The archipelago appeals to three types of travelers. Divers will find sites like Richelieu Rock, renowned for its soft corals in pink and violet hues and regular passages of manta rays and whale sharks. Snorkeling enthusiasts enjoy shallow, crystal-clear waters accessible directly from the beaches. Finally, the archipelago offers a rare encounter with the Moken, a community of "sea gypsies" settled on Surin Tai.

Unlike the more touristy neighboring islands around Khura Buri, Surin remains constrained by strict national park status: no permanent structures, limited accommodation, regulated visitor numbers.

History and the Moken people

The historical inhabitants of the archipelago are the Moken, nicknamed "sea gypsies". According to oral tradition, they originate from the Sino-Burmese region and have navigated the Andaman Sea for centuries aboard kabang, traditional wooden boats carved from a single log. Their culture is rooted in fishing, shellfish and crustacean gathering, distinctive dialects, and a spiritual relationship with the sea and nature spirits.

The December 2004 tsunami profoundly transformed their existence. Sheltered at Ao Chong Kaad during the disaster — where a deep knowledge of natural warning signs allowed them to flee in time — they were subsequently relocated and gradually settled. Fishing restrictions imposed by national park status, migration to coastal cities, and erosion of nomadic knowledge weigh on cultural transmission today. Several NGOs support the community to preserve language, maritime navigation skills, and food self-sufficiency.

The Mu Ko Surin maritime national park was established in 1981 and covers approximately 135 km². It encompasses the five islands and surrounding marine area, with strict regulations on mooring, fishing, and access to diving sites.

What to see and do

Diving and snorkeling

The most well-known sites:

• Richelieu Rock: an isolated pinnacle, one of Thailand's most renowned dive spots, frequented by whale sharks from February to May.
• Tao Bay: coral reef accessible by snorkel from the beach.
• Suthep Bay and Pak Kaad: varied marine life, conditions suited to intermediate divers.
• Turtle Ridge: zone frequented by green sea turtles.

Observable fauna includes manta rays, whale sharks, seahorses, barracudas, groupers, nudibranchs, harlequin shrimp and porcelain crabs. Hard and soft corals are in generally good condition, despite some areas affected by bleaching during recent warm episodes.

Beaches, jungle and terrestrial wildlife

The beaches of Koh Surin Nuea and Koh Surin Tai remain untamed, with no beach amenities. The interior of the islands is covered in tropical forest and mangroves sheltering monitor lizards, curved-toed geckos, green sea turtles nesting on certain beaches, as well as giant hermit crabs characteristic of pristine coastlines.

The Moken village

On the eastern coast of Surin Tai, the Moken village groups some 200 to 250 inhabitants living in bamboo huts on stilts. Visits are organized by the park. Some Moken work as rangers, longtail boat operators or guides, and offer local crafts (miniature kabang models, weavings, baskets).

When to visit

The park is closed from May to October due to the monsoon and sea conditions. The opening season runs from November to April.

• December to April: best period for diving, calm and clear water, temperature around 29°C.
• February to May (early season): peak whale shark passages at Richelieu Rock.
• December-January: high season, denser visitor numbers.

Practical information

Accommodation is concentrated at Ao Mai Ngam, on Koh Surin Nuea, managed by the park: simple bungalows and equipped tents, communal meals on site. Comfort remains basic — this is national park accommodation, not a beach resort — and network coverage is limited and irregular. Advance booking is recommended during high season via the Thai National Parks Department.

Good to know: several islets and marine zones are closed to visitors to preserve nesting areas and corals. Mooring is regulated, and certain diving and swimming sites are subject to seasonal closures.

How to get there

Phuket International Airport is the most convenient entry point: it is approximately 170 km from Khura Buri, or 2.5 to 3 hours by road. Bangkok is connected to Khura Buri by bus and train (stop at Surat Thani or Chumphon, then road connections).

Departures to the islands leave from the Khura Buri Pier. Several local operators run speedboat connections (approximately 1 hour crossing) or traditional boats. Day tours exist, but a 2 to 3-night stay allows better enjoyment of the more remote diving sites.

Nearby attractions

The Surin Islands combine well with other Andaman coast sites:

• Khura Buri: mainland gateway, useful for a night before departure.
• Ban Bang Pat: typical fishing village in Phang Nga bay.
• Ao Thalane: mangroves accessible by kayak, interesting complement after diving.
• Koh Hong: enclosed lagoons and karst formations to the south.

The Similan Islands, further south, constitute the other major diving site on the coast and are frequently combined with Surin on the same circuit.

Planning your trip

To integrate the Surin Islands into a broader Andaman coast itinerary, consult our tailored journeys in Thailand: combinations of diving, national parks and Moken culture adapted to your pace.