
The most beautiful islands in Thailand and worthwhile to visit. Our country is known as a country with the most beautiful tourist destinations in the world, especially the beautiful marine attractions with images of the blue sea, white sandy beaches, the lined coconut trees may probably familiar to many people. So today we would like to present the most beautiful islands in Thailand and they are also popular for Thai and foreign tourists that we should tell you as follows ;
The most beautiful islands in Thailand and worthwhile to visit
🏝️ Phi Phi Islands — Maya Bay view, Pileh Lagoon swim & snorkeling
Phi Phi Islands sit about 42 km from Mueang Krabi, within Hat Noppharat Thara–Mu Ko Phi Phi National Park. The group includes Phi Phi Don, Phi Phi Leh, Bamboo, Mosquito, Bida Nok, and Bida Nai—six jewels of the Andaman. Famed twin bays, Ton Sai and Loh Dalum, create postcard curves, while Maya Bay pairs powder-white sand with emerald-clear water. Coral reefs and colorful marine life add world-class snorkeling. No surprise millions visit each year, earning Phi Phi nicknames like the “Emerald of the Andaman” and “Paradise Islands.”

Popular tour to visit Phi Phi Islands
- Phi Phi and Khai Island Tour by Seastar Andaman From Phuket
- Phi Phi Island Snorkeling Tour from Koh Lanta by Speedboat
- Phi Phi Island Tour From Krabi
- Snorkeling Phi Phi Island Tour From Phi Phi by Speedboat
🏝️ Similan Islands — white-sand beaches, Sail Rock viewpoint & turtle-friendly reefs
Similan Islands are small islands in the Andaman Sea, there are 9 islands in total, sort of the north to the south: Hu Yong Island, Payang Island, Payan Island, Miang Island(There are 2 contiguous islands), Payu Island, Skull Island. (Koh Bon), Similan Island and Ba Ngu Island. These islands are regarded as beautiful islands both on the mainland and underwater which are still the integrity of the sea that can dive in both shallow and deep water. There are many kinds of colorful corals, colorful fish, and rare fish.
Similan Island or Koh Paed(8th Island) is the largest in the Similan Islands. The bay is curved like a horseshoe with fine white sandy beaches, soft and clear water to swim in. Under the sea, there are many beautiful corals and many different types of colorful fish. It is an island that can dive in both deep and shallow water. At the north of the island, there are large rocks in strange shapes, such as a boot-shaped rock or Donald Duck’s head image. The upper part that meets the beach line has a sailboat-shaped rock which is a beautiful viewpoint to see the beauty of the sea far and wide.
From November to April, it is the most interesting time to travel but from May to November, it is the southwest monsoon season. There are strong winds and waves that are dangerous for navigation and the National Park will announce the closure of the islands in May for natural revival every year.

Popular tour to visit Similan Islands
- Similan Islands Tour From Khao Lak
- Similan Islands Snorkeling Day Trip From Phuket
- Similan Island Snorkeling Trip from Krabi
🏝️ Koh Lipe — powder-sand beaches, crystal-clear water & coral gardens
Koh Sipe or Koh Lipe in Satun Province, the highlight of Koh Lipe is the nature of the coral around the island, beautiful coves with a soft and fine sand like powder. There are beautiful bays called Pattaya Bay and Chao Lay Beach with concave curves, fine white sandy beaches that both of these beaches can be reached on foot in about 15 minutes and there are also private lodges to serve the tourists as well. The visitors or the tourists can rent boats to the islands.
In addition, there are many Chao Lay(fishermen) communities living on the island, most of them are fishery career. On 2 nights before the full moon and on the full moon of the 6th month and the 12th month for 3 days and 3 nights, the villagers of Chao Lay lineage will join together to organize a carnival, and most importantly villagers will help each other build boats with Salacca wood and perform floating boat ceremony is believed to be a fortune in the fishery career and to predict destiny.

🏝️ Koh Samui — Ang Thong Marine Park, Big Buddha & Na Muang Waterfalls
Koh Samui, Surat Thani Province which is the third-largest island in the country and one of the country’s top tourist destinations. It is famous all over the world because it has beautiful nature and pure white sandy beaches. There are also all kinds of fully facilities, including many types of accommodations, convenient transportations, and has its own airport. Nowadays, Koh Samui is a tourist hub of the southern Gulf of Thailand which has both Thai and foreign tourists flock to visit millions of people each year.
Koh Samui has many famous natural sandy beaches such as Chaweng Beach, Lamai Beach, Taling Ngam Beach, and Natien Beach and has abundant natural resources, including forests and water sources. In addition, there are also full of stories and local arts and culture that create a lot of charm for this island.

🤿 Koh Tao — world-class diving, colorful reefs & Shark Bay snorkel
Koh Tao is a small island located in the middle of the Gulf of Thailand. It is approximately 74 kilometers from the coast of Chumphon Province, 110 kilometers from the coast of Surat Thani Province, 64 kilometers from Koh Samui, and about 45 kilometers from Koh Phangan. It is an island known as a paradise island in the Gulf of Thailand because it is an island with beautiful and rich nature. There are large and beautiful coral reefs in both shallow and deep water which are habitats for many different types of fish until becoming another world-famous diving point that the divers around the world have been rotated to visit and experience the underwater world of this paradise island.
Koh Tao also has many fine, pristine, beautiful, and quiet white sandy beaches around the island that complement the island is a perfect tourist destination that suitable for the name of Paradise Island. In addition, in the past of the beaches around Koh Tao were full of turtles that sought places to lay eggs which was the origin of the name Koh Tao.

Popular tour to visit Koh Tao
- One Day Trip to Koh Tao and Koh Nangyuan From Koh Samui by Speedboat
- Koh Tao and Koh Nang Yuan Snorkeling Tour From Koh Phangan
- More Activity on Koh Tao
🌅 Koh Lanta (Lanta Islands) — Koh Rok & Koh Haa snorkel, Lanta Old Town & sunset beaches
Koh Lanta, Krabi Province is a large island that has been inhabited continuously for more than a hundred years, consisting of Koh Lanta Yai and Koh Lanta Noi. Most of the tourist attractions are on Koh Lanta Yai , there is a highlight in Lanta Islands National Park which is located on the Tanod Cape at the end of the island is an area complete with rainforest. There are nature trails and most notably the white lighthouse which is like a symbol of Koh Lanta while Koh Lanta Noi is the location of the Koh Lanta District Office.
Because of far from the mainland, Koh Lanta is still keeping the beauty of sandy beaches and clean seawater. It also has traditional island lifestyles that are Thai-Buddhists, Thai-Chinese, Thai-Muslims, and New Thai(Chao Lay) living together in peace, in combination with the prosperity of the island head, the pier area, and the western beach is bustling with tourists. So visiting Koh Lanta, we have traveled many atmospheres at the same time.

🏝️ Nang Yuan Island — iconic triple-sandbar walk, viewpoint hike & reef snorkeling
Nang Yuan Island, Surat Thani Province consists of 3 small islands that are connected by sandbanks that look like the separated sea. The charm of Koh Nang Yuan coming from the crystal clear emerald waters, the small fish, shells, and corals that are clearly visible under the water. The most popular activities here are snorkeling to see corals and beautiful fish including swimming near the beach. In other words, most tourists choose to travel and relax here because of its private atmosphere, fresh air, and also its greenery of small 3 mountains surround and the beauty of the sea meets.
Therefore, if you are the one who has a passion for nature, fall in love with the sea, like the privacy, and truly need rest, don’t forget to come to relax at Nang Yuan Island.

Popular tour to visit Nang Yuan Island
- One Day Trip to Koh Tao and Koh Nangyuan From Koh Samui by Speedboat
- Koh Tao and Koh Nang Yuan Snorkeling Tour From Koh Phangan
🏝️ Surin Islands — pristine reefs, gentle bays for snorkeling & Richelieu Rock diving
Surin Islands or Surin Islands National Park named after Phraya Surintharacha (Nokyoong Wisetkul) the lieutenant governor(Thesapiban)of Phuket who discovered the islands. They are a national park located in Phang Nga Province. The islands feature an archipelago in the Andaman Sea, is adjacent to the Thai-Myanmar border, consist of 5 islands such as Koh Surin Nua(North Surin Island), Koh Surin Tai (South Surin Island), Khai Island (Torinla Island), Klang Island (Pajumba Island), Koh Ri (Stock Island) and one stone pile of submerged rocks is Richelieu Rock.
Count as having abundant nature both on the mainland and in the sea, there are rain forests, beach forests, mangrove forests that converge with the coral reefs. The coral reefs are still intact suitable for snorkeling to see shallow corals. Richelieu Rock is a place suitable for scuba diving, a rich source of nature under the sea, there are many kinds of fish and is the point where whale sharks are found most frequently in the Thai sea. The ideal time for traveling is from November to April.
On Koh Surin Tai, a Moken (Morgan) community—part of the Chao Lay peoples—continues many traditional practices. Around 200 residents live in the village. Some sell handmade souvenirs to visitors, and others work with the national park. Use “Moken” or “Chao Lay community” rather than “gypsy,” which many consider offensive.

Popular tour to visit Surin Islands (Mu Koh Surin)
- Surin Islands Snorkeling Day Trip From Phuket
- Surin Islands Snorkeling Tour From Khao Lak
- Surin Islands Overnight Tour 2 Days 1 Night From Phuket
🏝️ Ang Thong Islands (Mu Koh Ang Thong) — Emerald Lake viewpoint & sea-kayak bays
Ang Thong Islands located in the area of Ang Thong National Marine Park, Surat Thani Province. They consist of 42 islands, including Koh Pha Luai, Koh Wua Ta Lap, Koh Mae Koh, Koh Sam Sao, Koh Hin Dab, Koh Nai Phut, and Koh Phai Luak, etc. Each island has a beach on almost every island, some islands have pure white sandy beaches, some islands have many types of coral along the seashore with beautiful colors in the midst of tranquility.
Attractions in Ang Thong Islands are Koh Tai Plao and Koh Wua Kan Tang, there are spots of coral reefs and white sandy beaches. Koh Wua Ta Lap in Ao Kha area, is a clean white sandy beach suitable for swimming, relaxing on the beach. When going up to the viewpoint on the top of the mountain, you will see all Ang Thong Islands spanning a long line of strange shapes. Koh Hin Dub is an island with a beautiful sandy beach and the longest beach in the national park. The terrain and scenery around the island are beautiful to see.

Popular tour to visit Ang Thong Islands (Mu Koh Ang Thong)
- Koh Samui To Angthong National Marine Park Snorkeling Tour By Big Boat
- Mu Ko Ang Thong National Marine Park Snorkeling Tour From Koh Samui
- Ang Thong National Marine Park Tour From Koh Samui By Speedboat
- Angthong National Marine Park Snorkeling & Kayaking Tour : Koh Phangan
🌊 Thale Nai (Talay Nai) — emerald lagoon, viewpoint stairs & boardwalk trail
Thalay Nai or the lake in the middle of the mountain is on Koh Mae Koh, a large natural lake surrounded by high limestone mountains and complex, but there is an underwater tunnel connecting the sea. The origin of this salt lake has been assumed that caused by the collapse of the lower strata of rock causing a collapsed pond. They occur simultaneously with the islands or maybe due to chemical changes in the same process as a cave formation.
However, between November – December every year is the monsoon season, in the sea will have strong waves, it is not safe for tourists to travel to Ang Thong Islands. The national park is scheduled to close the annual tourism, so tourist season will be closed from 1 November to 23 December each year and tourist season will be opened again from 24 December – 31 October each year.

Popular tour to visit Thalay Nai
- Koh Samui To Angthong National Marine Park Snorkeling Tour By Big Boat
- Mu Ko Ang Thong National Marine Park Snorkeling Tour From Koh Samui
- Ang Thong National Marine Park Tour From Koh Samui By Speedboat
- Angthong National Marine Park Snorkeling & Kayaking Tour : Koh Phangan
🏝️ Khai Island — powder-sand beach, shallow snorkel & turquoise water
Khai Island, also called Torinla, has two small islets: Khai Nok and Khai Nai. Both offer white sand and clear water. Colorful fish swim near the shore, with coral reefs close by. You can book a tour through local agencies. Or hire a boat from Koh Siray Pier, Laem Hin Pier, or Chalong Bay in Phuket.

Popular tour to visit Khai Island
- Khai Island Snorkeling Premium Tour From Phuket
- James Bond Island & Khai Island Tour From Khao Lak By Seastar Andaman
- Phi Phi and Khai Island Tour by Seastar Andaman From Phuket
- Phi Phi Island and Khai Island Snorkeling Tour from Phuket
🏝️ Poda Islands — white-sand beach, iconic limestone stack & easy snorkel
South of Ao Nang in Krabi, about 8 kilometers offshore, lie islands with powdery white sand and clear water. Here, coral reefs fringe the coast and remain largely intact. Snorkeling suits both beginners and confident swimmers. Conditions stay favorable most of the year, and monsoons rarely disrupt fishing. From Ao Nang, a longtail boat takes about 25 minutes. You can also join a 4 Islands tour that includes Poda.

Popular tour to visit Poda Islands
- Krabi 5 Islands+Talu Cave Snorkeling Tour by Longtail Boat
- Krabi 4 Island Tour
- 4 Island Tour By Longtail Boat From Krabi
- Krabi 7 Island Sunset Buffet BBQ Dinner Tour
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Other places you might like: Phuket, Krabi, Koh Samui, Koh Phi Phi, Khao Lak, Koh Lanta, Bangkok.