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Hidden Beautiful Islands in Thailand

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Hidden Beautiful Islands in Thailand

Thailand is not only about famous islands like Phuket or Koh Samui—there are still many hidden islands scattered across the country, from the eastern coast to the Andaman Sea, waiting to be discovered. Each offers a distinct charm, far from the crowds and untouched by mass tourism

Some are small, quiet islands with powdery white sand and crystal-clear water, perfect for a peaceful escape. Others are known for vibrant shallow reefs where you can easily spot marine life, while a few stand out with dramatic rock formations or sandbars that appear during low tide—creating unique and photogenic landscapes

What truly sets these islands apart is not just their beauty, but the sense of privacy and raw nature they preserve. With minimal development and fewer visitors, every trip feels like discovering your own secret paradise

So, which of these hidden islands have you visited? Or do you know any lesser-known gems in Thailand that deserve to be on the list? Share your favorites—your suggestion might inspire someone’s next island escape

1

Koh Kham
Koh Kham is a small private island located just about 1 kilometer from Koh Mak in Trat Province. It has earned the nickname “Emerald of the Trat Sea” thanks to its exceptionally clear waters with striking emerald-green tones that shimmer under sunlight, allowing visitors to see the sandy seabed with remarkable clarity. The island offers a peaceful, uncrowded atmosphere due to cont...
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2

Koh Yuak
Koh Yuak is a small islet located west of Koh Chang, directly across from Kai Bae and Klong Prao beaches. Despite being uninhabited and having no major facilities, Koh Yuak is highly regarded as one of the best snorkeling spots near the Koh Chang shore. Characterized by rocky outcrops and small white sand patches, the surrounding waters are exceptionally clear and shallow, making it a favorit...
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3

Krok island
Krok island is a small, exclusive island covering approximately 0.05 square kilometers, located just a few kilometers west of the Pattaya coastline. Although it is a private island, it warmly welcomes visitors to experience the beauty of its powdery white sand beach that stretches along the eastern side, creating a stunning contrast with the crystal-blue waters. The most distinctive feature o...
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4

Sak Island
Sak Island is a small, uniquely shaped island resembling a horseshoe or the letter "U." Located only a few hundred meters from the larger Ko Lan, this small island is a paradise for relaxation. It offers a level of privacy and quietness that is hard to find on the main beaches of Pattaya. The island features two main shorelines North Beach and South Beach which are conveniently connected by a...
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5

Koh Kram Noi Island
Koh Kram Noi Island is a small island located near Koh Kram Yai, under the supervision of the Royal Thai Navy. The distinctive charm of this island lies in its undisturbed natural state; as it is not a primary stop for large tour boats, Koh Kram Noi maintains an exceptionally quiet and private atmosphere. The beaches boast fine, creamy white sand that contrasts beautifully with the gradient shades...
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6

Koh Kham Island
Koh Kham Island also known as Koh Kham Underwater Park, is a small island located west of Koh Samaesarn in Chonburi Province. The island is under the supervision of the Royal Thai Navy’s Fleet Operations Command, which places strong emphasis on environmentally responsible tourism alongside strict natural resource conservation. As a result, Koh Kham has preserved its pristine environment...
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7

Chula Island
Chula Island is one of the islands located close to the Chanthaburi coast, often mentioned as an island that retains its pristine nature and serves as a true sanctuary for those wishing to immerse themselves in nature. Access to the island requires a boat trip from Laem Sing shore or other authorized points. Upon arriving at the island, you will discover a fine, soft white-sand beach stretchi...
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8

Kwang Island
Kwang Island is a coastal tourist destination not far from Chanthaburi city, located within the vicinity of Ao Khung Kraben. The beach sand at Ko Kwang is remarkably white, clean, and fine, making it safe for swimming and perfect for seaside relaxation. Its geographic shape, extending into the sea, gives Ko Kwang a distinctive character and makes it an iconic image of the area. The unique fea...
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9

The Khao Tao Rocky Isles
The Khao Tao Rocky Isles, consisting of Koh Sadoa and Koh Kheenok, are hidden marine gems with significant ecological value, located approximately 2-3 kilometers from Khao Tao Beach. Both islands are distinctly rocky formations with no sandy beaches suitable for landing or relaxing. Their importance lies in their role as shelters and nurseries for marine life and as a destination for short boat tr...
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10

Koh Talu
Koh Talu is considered the most significant marine attraction in the Bang Saphan Noi District and a heaven for snorkelers in Prachuap Khiri Khan province. The island gets its name from its distinctive geological feature: a large hole eroded by seawater at the tip of the island, allowing one to see the sky and sea through it. This feature has become an iconic symbol attracting tourists. Koh Talu is...
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11

Ko Ngam Yai Chumphon
Ko Ngam Yai is a towering limestone island without a beach, making it inaccessible to visitors for landing because part of the island is under a swiftlet nest concession. Tourists are therefore limited to activities around the island. The true wonder of Ko Ngam Yai lies underwater, where it is considered one of the best diving spots in Chumphon. The waters here are rich with ma...
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12

Koh Langka Jiew
Langkajiu Island is one of the most famous islands in the Chumphon Archipelago National Park, located about 12 kilometers off Hat Sai Ri Beach. It is a small island with a relatively short perimeter but is full of charm in terms of history, nature, and the richness of its marine ecosystem. The island has natural lim during his southern tour in 1897 (B.E. 2430). The inscription is located at t...
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13

Koh Maprao Chumphon
Koh Maprao Chumphon is one of the islands within Mu Ko Chumphon National Park, a marine conservation area that protects the rich biodiversity of Chumphon’s coastal waters. Although it is a small island — with a beach of only about 100 meters long — it captivates visitors with its serene and natural beauty. The surrounding waters of Koh Maprao are home to colorful coral reefs...
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14

Koh Tae Nai
Koh Tae Nai is a small island off Thong Sala Bay, only about 400–500 meters from the coast. Despite being close to the town, it offers a peaceful and natural atmosphere. Due to the absence of permanent residents and buildings, it is a private relaxation spot near the city that remains well-preserved. The island's highlight is the clean white sandbar extending into the sea, surrounded by clear blue...
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15

Koh Khang Khao
Koh Khang Khao is one of the highlight islands in the Kam Islands, located within Laem Son National Park in Ranong. It is a small island that remains highly pristine, with no permanent structures or commercial facilities, offering a peaceful and untouched natural atmosphere. The name “Koh Khang Khao” (Bat Island) comes from the past when the island was home to a large population of fru...
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16

Koh Kam Tok
Koh Kam Tok has a curve-shaped inlet where the park protection unit in charge of guarding and providing facilitation to tourists is located. To reach the island, it takes 20 minutes by boat from Ko Khang Khao. This panoramic view of the island is one of the famous destination among the tourist and local since the view is quite different to other island. It is the area of white sandy beac...
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17

Koh Japan
Koh Japan is one of the key islands in the Kam Islands group, managed by Laem Son National Park. It is a small island that remains highly pristine due to the absence of permanent structures or accommodations, allowing its coastal ecosystem to stay close to its natural state. The beach is especially notable for its extremely fine white sand, almost powder-like in texture. This is formed from the na...
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18

Koh Pha
Koh Pha is a hidden paradise in the Andaman Sea, often referred to as the “Maldives of Thailand” due to its striking contrast between powdery white sand and vibrant blue waters. The island was once covered with lush vegetation, but following the devastating 2004 Tsunami, its geography transformed dramatically, leaving behind a shifting sandbar and scattered rocks that appear and disapp...
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19

Tapao Yai Island
Tapao Yai Island is located approximately 4 kilometers from the Phuket mainland, situated in Ao Makham near Cape Panwa. It is considered a hidden gem that has miraculously preserved its lush forest and coastal ecosystems. The island's most prominent feature is being a natural habitat for the Oriental "Pied Hornbill", a bird species that serves as one of the most significant indicators of fore...
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20

Kaeo Yai Island
Kaeo Yai Island is a small island located off the coast of Phuket province, near Laem Phromthep in the Rawai area of ​​Phuket Town. Separated from the main Laem Phromthep viewpoint, it's a charming rocky island with a small area surrounded by the azure Andaman Sea. Although not yet considered a top destination, the island remains highly significant, ideal for beginners and offering a clear, r...
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21

Koh Rang Yai
Koh Rang Yai is a small island located east of Phuket Province, in the Koh Kaew Subdistrict of Phuket City District. Its proximity to the mainland makes it easily accessible for day trips. Situated in Phang Nga Bay, the island enjoys relatively calm waters with gentle waves compared to the western Andaman coast, making it ideal for tourists seeking relaxation or light water activities such as swim...
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22

Koh Bon
Koh Bon is a small island located south of Phuket province, approximately 1.5–2 kilometers from the coast of Rawai Beach, a short 10–15 minute boat ride away. The island's topography consists of limestone formations mixed with tropical land and forest, creating varying elevations and dense vegetation. This makes it relatively pristine compared to larger tourist islands in Phuket. Koh B...
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23

Coconut Island
Koh Maphrao, is a small island encompassing approximately 1,040 acres (2,600 Rai) located off the eastern coast of Phuket, just 600 meters from the mainland. The island’s geography remains remarkably preserved, with about 70% of the terrain consisting of lush mangroves, coconut groves, and rubber plantations. This serves as one of the most significant green lungs situated near Phuket's urban...
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24

Koh Racha
Racha Yai Island, or "Koh Raya Yai" as it is locally known, is a gem in the Andaman Sea located approximately 15 kilometers south of Phuket. The island's geography is characterized by a horseshoe-shaped coastline, with much of the interior consisting of flat foothills covered in lush tropical forests. The primary geological allure that draws global travelers is "Patok Bay," a sheltered cove on the...
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25

Maiton Island
Maiton Island, or Koh Mai Thon, often referred to as "Honeymoon Island," is a boutique private paradise characterized by its unique elongated shape resembling a wooden log. Situated approximately 9 kilometers off the southeast coast of Phuket, the island stands as a testament to successful environmental preservation. Due to its private ownership and strict daily quotas on visitor numbers, the isla...
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26

Kudu Island
Kudu Island is the definition of a hidden treasure, carefully concealed by nature to preserve one of the most remarkable Unseen destinations in Phang Nga Bay. Among the many islands scattered across the bay, Kudu Island stands out with its unique geological formation, where dramatic limestone cliffs encircle a small bay or "lagoon" (Lagoon) completely. The water داخل the lagoon is exceptionally cl...
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27

Khai Nai Island
Khai Nai Island is one of the hidden gems of Phang Nga that attracts travelers from around the world. Despite its small size—small enough to walk around in a short time—the island offers breathtaking natural beauty. Its most distinctive feature is the powdery white sand beach, soft and clean, contrasting beautifully with the deep blue sea. What makes Khai Nai Island truly special is th...
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28

Koh Nok Koh Yao
Koh Nok is a perfect example of how something small can hold extraordinary beauty. Although it is much smaller than nearby islands like Koh Yao Noi and Koh Yao Yai, it offers a unique experience that attracts adventure travelers from around the world. The island’s charm lies in its raw and untouched nature, with its main highlight being the hiking trail leading to one of the most spectacular...
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29

Poda Island
Poda Island is part of Hat Noppharat Thara–Mu Ko Phi Phi National Park, located just about 8 km from Ao Nang beach. This small island is renowned for its stunning white sandy beach and shallow coral reef areas that make it ideal for swimming and snorkeling. A unique highlight is the tall limestone rock emerging from the sea in front of the beach—perfect as a photo backdrop. During low ...
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30

Koh Rok Nok
Ko Rok Nok is widely recognized as one of the most pristine island destinations in the Andaman Sea, serving as the southern jewel of the Mu Ko Lanta National Park. Geographically, it sits in tandem with its sister island, Ko Rok Nai, separated by a narrow sea channel approximately 250 meters wide. While Ko Rok Nai is characterized by steep limestone cliffs and rugged terrain, Ko Rok Nok is a parad...
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31

Koh Kradan
Ko Kradan is one of the most beautiful islands in Trang province, featuring pristine white-sand beaches and ultra-clear water that reveals colorful coral reefs and tropical fish beneath the surface. Most of the island is protected by Hat Chao Mai National Park, preserving its unspoiled charm and peaceful ambiance. Visitors can enjoy a wide array of activities—snorkeling, beach volleyball, be...
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32

Koh Lidi
Koh Lidi is situated within the boundaries of Mu Ko Phetra National Park and is a recognized site under the Satun UNESCO Global Geopark. The name "Lidi" is derived from a Malay word meaning "thin stick" or "coconut leaf spine," referencing the long, slender physical appearance of the island chain. The area primarily consists of two main islands: Koh Lidi Yai and Koh Lidi Lek. The topography is cha...
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33

Ko Kao Yai
Koh Khao Yai, situated within the Mu Ko Phetra National Park, stands as a cornerstone of the Satun UNESCO Global Geopark—Thailand's first-ever UNESCO-recognized global geopark. The island's geological composition is primarily characterized by Ordovician limestone, dating back over 450 million years. Its most profound feature is the "Prasat Hin Pan Yod" (Thousand-Spired Stone Castle), a geolo...
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