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10 Best Secret Islands in Thailand

Escape for a Day to the Lesser-Known Islands of Thailand

These secret islands in Thailand are excellent alternatives to the well-worn tourist trails around Koh Samui and Phuket. As a major tourism destination in Southeast Asia, Thailand hosts a great choice of attractive places to stay. As the country is bordered by two large bodies of water – the Andaman Sea to the west, and the Gulf of Thailand to the east – there are over 300 islands, most of them uninhabited, but a handful of them are already world-famous as dream holiday destinations – with crowds to match the fame.

If following the crowds isn’t your idea of a relaxing holiday, check out these smaller islands that have started to develop their infrastructure to accommodate visitors from abroad. As always, backpackers are the pathfinders of new exotic places, and the Thai islands in this list will certainly become very popular soon. To beat the crowds, you should visit them while they are relatively unknown. 

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    1

    Koh Lipe

    Satun Province
    Koh Lipe

    Koh Lipe (also spelt Koh Lipeh or Koh Lipey) is a small paradise island right next to the Tarutao National Marine Park, near the border with Malaysia in southern Thailand. It's famous for its 3 pristine beaches, Sunset Beach, Sunrise Beach, and Pattaya Beach. While Koh Lipe hosts a fair amount of accommodation choices, it’s still relatively unknown. 

    You can enjoy a relaxing holiday far from the crowds, while enjoying activities like snorkelling, scuba diving, and island-hopping. Koh Lipe is well served by ferries and speedboats from Pak Bara (Satun Province), Phi Phi, Koh Lanta, and Trang during the high season (December–April). However, the island can only be reached by speedboat from Pak Bara in the low season. Read More...

    • Location: Koh Lipe, Satun 91000, Thailand
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    2

    Koh Phayam

    Ranong Province
    Koh Phayam

    Koh Phayam is the most popular island in the Province of Ranong. Located 200 km north of Khao Lak, it's a great getaway for those looking for an off-the-beaten-track destination in Thailand. Featuring 2 main beaches, Ao Yai (Long Bay) to the southwest and Ao Khao Kwai (Buffalo Bay) to the northwest, this 50-sq-km island has only around 500 residents, It offers a travel-back-in-time experience. 

    There are no cars on Koh Phayam, so the only way to travel around is by renting a motorbike or bicycle. A few narrow cement roads allow people to easily reach the main bays and tips of the island from Koh Phayam Pier (on the east coast). The central part of Koh Phayam is rather flat and hosts cashew tree plantations and virgin forest. A large patch of mangrove forest can be found at the western end of Buffalo Bay, offering a wild playground to sea kayakers. Read More...

    • Location: Koh Phayam, Ranong 85000, Thailand
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    3

    Koh Rok

    Trang Province
    Koh Rok

    Koh Rok is a tropical island in Krabi Province. While many people go there as a day trip, there’s an option to stay overnight as well. The island is part of the Mu Koh Lanta Marine National Park so an admission fee applies. It's actually made up of twin islands, Koh Rok Nai and Koh Rok Nok, which are around 200 metres from each other. 

    Famous activities include snorkelling, scuba diving, and camping. There are tents and bungalows available for rent at Koh Rok Nok. Note that Koh Rok is only accessible in the high season (October–May). Read More...

    • Location: Koh Rok, Koh Libong, Kantang, Trang 81150, Thailand
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    4

    Koh Mak

    Trat Province
    Koh Mak

    Koh Mak is around 35 km off the coast of Trat Province on the eastern side of the Gulf of Thailand. This 16-sq-km island has a picturesque shoreline spanning 27 km, with splendid white sand beaches, coconut groves and mangrove forests.

    Koh Mak hosts a good range of accommodation for all types of budget. Sea kayaking and snorkelling are the favourite activities on the island. At low tide, you can walk to Koh Kham, an islet just 1 km off the northwestern tip of Koh Mak. Despite its recent development in tourism, Koh Mak retains a strong and pleasant local vibe.

    • Location: Koh Mak, Koh Kut, Trat 23000, Thailand
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    5

    Koh Tarutao

    Trang Province
    Koh Tarutao

    Koh Tarutao is just north of Langkawi Island in Malaysia. The island lends its name to a national park which counts no less than 51 islands. Around 70% of the island is covered by thick rainforest, making it a great place for outdoor activities. 

    Koh Tarutao used to be a penal colony between 1938 and 1948. The national park headquarters offers 2 types of accommodation: bungalows and tents. The island’s most beautiful beaches are on the west coast, while the east coast has lush mangrove forests. Birdwatching, hiking, and snorkelling are the main activities on the island. Ferries and speedboats link Koh Tarutao to Pak Bara and Koh Lipe.

    • Location: Koh Tarutao, Satun 91000, Thailand
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    6

    Koh Ngai

    Krabi Province
    Koh Ngai

    Koh Ngai (or Koh Hai) in Krabi is great for nature lovers in Thailand. The island has some great coral reefs along its coastline, making it popular for snorkelling. It's under the supervision of Mu Koh Lanta National Park. Expect plenty of big and small beaches with gorgeous views of tiny karst islands and some equally well-known nearby islands, including Koh Libong and Koh Mook and Koh Lanta. 

    Koh Ngai has a handful of beach accommodation, some of which have swimming pools. Outside guests can make use of the facilities if they dine at onsite restaurants or bars. Read More...

    • Location: Koh Ngai, Koh Lanta Yai, Krabi 81150, Thailand
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    7

    Koh Phra Thong

    Phang Nga Province
    Koh Phra Thong

    Koh Phra Thong ('Golden Buddha Island' in Thai) is an 88-sq-km island about 40 km north of Khao Lak. As with most islands along Phang Nga and Ranong provinces’ coast, it has mangrove forest to its eastern coast and white-sand beaches and rocky islets to its western coast.

    The central area of the island has all the characteristics of an African savanna – you’d almost expect to see zebras, giraffes and lion wandering around! Koh Phra Thong counts only a few accommodation choices. Most hotels on the west coast are budget or mid-range bamboo-and-thatch bungalows. Read More...

    • Location: Koh Phra Thong, Khura Buri, Phang Nga 82150, Thailand
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    8

    Koh Mook

    Krabi Province
    Koh Mook

    Koh Mook lies between Krabi and Trang in the Andaman region. Rumour has it that it was here at Emerald Cave where pirates used to hide their treasure. The place was known only a few decades ago, accidentally found by locals searching for bird’s nests (a delicacy in Chinese cuisine). 

    Koh Mook (also spelt Koh Muk) has subsequently been ‘discovered’ by paradise seekers from all over the world. A handful of accommodation options are on the island. Many are on Haad Farang Beach, operating only during the high season (November–April). A few of them stay open year-round, great for those who prefer to visit in the low season. Most Koh Mook hotels are in the budget to mid-range category, meaning you can choose from a basic bamboo chalet with the fan to a comfortable bungalow with air-conditioning. Read More...

    • Location: Koh Libong, Kantang, Trang 92110, Thailand
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    9

    Koh Kho Khao

    Koh Kho Khao

    Koh Kho Khao offers an off-the-beaten-track getaway for families in Thailand. The island is a short boat ride from Takua Pa, just north of Khao Lak. Its main attraction is a 14-km-long beach that might remind you of the long strips of sand in Khao Lak. 

    While the island is barely developed, it still hosts a decent choice of hotels and resorts. You can rent a motorbike to explore the different areas of the island, which include mangrove forest, an overgrown airstrip used by the Japanese during WWII, and an archaeological site. Sea kayaking is a popular activity on Koh Kho Khao, but there’s also a dive centre offering diving and snorkelling trips to nearby sites, and further west, to the Similan Islands.

    • Location: Koh Kho Khao, Takua Pa, Phang Nga 82190, Thailand
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    10

    Koh Bulon Leh

    Koh Bulon Leh

    Koh Bulon Leh is excellent for those looking for an authentic island experience in southern Thailand. A few lowkey bungalows and only one modern resort are on the island. Note that only the resort has 24/7 electricity, while other accommodations only rely on a generator at night. 

    A holiday on Koh Bulon Leh is truly an experience as it seems like progress has not yet reached the coast of this little pristine island. The inhabitants are chao leh (sea gypsies), who carefully maintain the island’s natural beauty. The crystal-clear water surrounding Koh Bulon Leh hosts impressive marine life. Snorkelling, sea kayaking, and hiking are the main activities on the 3-sq-km island. You can explore it on foot, hopping from one beach to the other.

    • Location: Koh Bulon Leh, Pak Nam, La Ngu, Satun 91000, Thailand
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