Thailand Islands: Guide to Choosing the Best One in 2025

Thailand is a paradise for nature lovers, culture enthusiasts, and adventurers, offering over 300 stunning islands, many of them among the world’s most pristine. You can relax on white sandy beaches, explore biodiverse underwater worlds, discover Buddhist temples, or enjoy authentic local experiences.

With so many options, how do you choose the best islands? What’s the ideal time to visit? How do you get there? This article provides all the tips and essential information to help you plan your perfect island getaway in Thailand, along with our top island recommendations.

Written by Preetika Narula (Local Expert)Updated on 27-11-2024

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Map of Thailand islands: which side is better?

Southern Thailand is a worldwide paradise, split by the Andaman Sea on the west and the Gulf of Thailand on the east. Each coast boasts different landscapes, experiences, and varying weather conditions at all times.

• Andaman Sea-West Coast: It offers a dramatic turquoise water, rising limestone cliffs, and spectacular marine life. In its belt are Krabi, Phuket, Phi Phi Islands, and Koh Lipe. It is the place for serenity-seekers, offering tranquil beaches and spacious settings for nature lovers.

• Gulf of Thailand: East Coast-for the more culturally immersed, particularly with a lively nightlife. Islands such as Koh Samui, Ko Phangan, and Ko Tao boast a mixture of vibrant social scenes and relaxing beach experiences.

Each island on the south of Thailand's coast has its own personality to promise sun, sand, sea, and delectable local cuisine at very affordable prices.

Best time to visit Thailand’s Islands

Andaman Sea Islands (Krabi, Phuket, Phi Phi, Koh Lanta)

• Best Time to Visit: Late October to May is the ideal period, with October to December offering the most pleasant weather with moderate temperatures and calm seas.

• Monsoon Season: The southwest monsoon from June to the end of September brings heavy rains, high humidity, and rough seas, leading to the closure of many resorts and limited ferry services.

Gulf of Thailand Islands (Koh Samui, Koh Phangan, Koh Tao)

• Best Time to Visit: January to August is the dry season, with the peak being late January to mid-March. These months offer warm, sunny days perfect for beach activities and water sports.

• Avoid: October and November are the wettest months, while July and August can be crowded due to international tourists, particularly from Europe and Australia.

>>> Why not treat yourself to a vacation on Thailand's islands with our tailor-made Thailand tours?

1. Krabi

Krabi, located on the west coast of the southern peninsula of Thailand, welcomes you with its majestic limestone pillars, its lush mangroves, its expansive waters and its spectacular coastline.

1.1 Highlights:

• Railay Beach: Divided into East, West, and Phra Nang Beach, Railay always has something for everyone: swimming opportunities and a stunning view of the sunsets, It’s also famous and popular with foreign tourists for climbing.

• Ao Nang: A lively beach with a bustling town center, offering easy access to nearby islands and stunning sunsets.

1.2 How to Get to Krabi: 

Krabi International Airport, just 15 km from the city center, provides easy connections from Bangkok, Koh Samui, Phuket, and international destinations like Kuala Lumpur and Singapore.

>>> Learn about: Krabi or Phuket? - 10 Key Questions To Make a Decision 🗺️

2. Koh Phi Phi

Located in the famous Andaman Bay, the Koh Phi Phi archipelago is the pearl of the region. Composed of six different islets - Koh Phi Phi Don, Koh Phi Phi Leh, Koh Mai Phai, Koh Yung, Bida Nok and Bida Nail - this archipelago offers landscapes worthy of a postcard. 

2.1 Highlights:

• Phi Phi Don: the only one to be inhabited, known for its vibrant nightlife, bustling markets, and scenic viewpoints. It’s the perfect base for exploring the archipelago’s stunning beaches and dive sites.

• Phi Phi Leh: Home to the legendary Maya Bay, which has been carefully managed to allow ecological recovery. It’s now open for limited visits, offering a more serene experience away from the crowds.

2.2 Activities:

Snorkeling, diving, rock climbing, and exploring hidden coves and beaches. Don’t miss the sunset view from the Phi Phi viewpoint, one of the island’s most iconic spots.

2.3 How to Get to Koh Phi Phi

Accessible in just 45 minutes by speedboat or 90 minutes by ferry from Phuket or Krabi, these Koh Phi Phi islands are among the most convenient and popular destinations in Thailand for those seeking a quick escape to paradise. 

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3. Phuket

As the largest island in Thailand, with an area of up to 540 km², Phuket is a must-see destination located in the south of the country. This island offers an incredible diversity, with its large and small islands, its mountain ranges, its caves, its waterfalls, its cliffs and its virgin forests.

3.1 Highlights

The west coast of Phuket can offer everything from the frenetic Patong Beach to quietest Nai Harn Beach. For quieter retreats, Kata Noi and southern tip at Cape Panwa are your best bet.

3.2 Activities

• Cultural Experiences: In your spare time, explore Phuket's Old Town with its unique blend of Sino-Portuguese architecture, vibrant street art, and eclectic shops. Panoramic views of the island await at the Big Buddha; day trips to the Phi Phi Islands.

• Nature and Adventure: You can paddle through the towering rock formations of Phang Nga Bay in a kayak, make a voyage of discovery through undiscovered caves, or simply lounge around on the laid back beaches of Similan Islands-one of the best diving destinations in the world.

3.3 How to get to Phuket:

The easiest way to reach Phuket is by flying directly to Phuket International Airport, located in the north of the island, about 30 minutes from the main tourist areas. 

Many daily flights connect Phuket with major Thai cities like Bangkok (1.5-hour flight) and international locations like Singapore and Kuala Lumpur.

>>> Read more: Top 8 Beaches in Phuket

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4. Koh Lanta

When we talk about Koh Lanta, we refer to a vast archipelago composed of 52 islands off the Andaman Sea. The name "Lanta" is supposed to derive from the Thai words "koh lan daa", which mean "island with millions of eyes".

4.1 Highlights

• Koh Lanta Yai: The hub of tourism with a wide range of accommodations, from budget bungalows to luxury resorts. 
• Koh Lanta Noi: Offers a quieter, more traditional atmosphere with local villages, rubber plantations, and deserted beaches.
• Other must-see attractions include the lighthouse in the south of Koh Lanta Yai and surrounding islets like Koh Ngai, Koh Muk, and Rai Koh.

4.2 Activities

• Snorkeling and diving: Colorful marine life tour to the Four Islands that features a swim through the Emerald Cave to a hidden lagoon.
• Lanta Old Town & Walking Street: Wind your way through this quaint old town and enjoy the weekend Walking Street market full of local snacks and crafts.
• Night Markets: Enjoy fresh seafood, Thai dishes, and desserts like mango sticky rice at the night markets in Koh Lanta.
• Giant's Elephant Sanctuary: Check out this ethical sanctuary and see the elephants in their natural setting with no rides or shows.

4.3 How to get to Koh Lanta

Koh Lanta can be reached via ferries from nearby Krabi, Phuket, and other islands in the region. The main gateway is through Krabi, where you can catch a ferry or speedboat from the pier. Koh Lanta Yai and Koh Lanta Noi are connected by a bridge, allowing easy access between the two islands.

5. Koh Lipe

Located at the southern end of Thailand, Koh Lipe is a small island that is part of the Koh Tarutao National Marine Park archipelago and located at the border with Malaysia. Nicknamed the "Thai Maldives", Koh Lipe is a true gem for beach lovers.

>>> For information, please read: Scuba Diving In Thailand: The 10 Most Fascinating Dive Sites 🤿

5.1 Highlights

• Sunrise Beach: A tranquil spot perfect for morning strolls and stunning sunrises.
• Chado Cliff Viewpoint: Offers panoramic views of Koh Lipe and the surrounding waters, ideal for hikers seeking quieter spots.
• Walking Street: The lively nightlife hub of Koh Lipe, with numerous dining options and vibrant atmosphere from evening until late.
• Other destinations: Koh Tarutao, Koh Adang, Koh Rawi and Koh Yang.

5.2 Activities

• Snorkeling Among Coral Reefs: Explore vibrant reefs around Sunrise Beach and Koh Usen with affordable guided trips.
• Diving: Discover underwater caves, shipwrecks, and diverse marine life including dolphins and whale sharks.
• Kayaking: Rent kayaks to explore nearby beaches and secluded spots, offering a unique view of the island's coastlines.

5.3 How to Get to Koh Lipe

Koh Lipe can be reached by ferry from Koh Lanta, Koh Phi Phi, Phuket, Krabi, and Langkawi.

6. Trang Islands

Located along the magnificent Andaman coast, the sparkling islands of Trang offer a quiet retreat, away from the more well-known tourist destinations such as Ko Lanta, Ko Phi-Phi and Phuket.

6.1 Highlights:

• Koh Muk: Famously known for the Emerald Cave, in which one can swim through the tunnel to get to a hidden beach. Part of Chao Mai National Park, it is replete with jungles and snorkeling opportunities.
• Trang Islands: Comprise 46 islands along the 200-kilometer coastline, including Koh Kradan and Koh Ngai; the national parks protect pristine and eco-friendly seaside experiences.

6.2 Top Activities:

• Emerald Cave Adventure: Swim through a tunnel to discover the hidden pirate hideout in Koh Muk.
• Snorkeling & diving: Observe plenty of marine life in the waters around Koh Muk and other nearby islands.
• Island Hopping: Easy access to islands such as Koh Lanta and Koh Ngai, with frequent minibus and boat transfers.

6.3 How to Get to Trang

• Train: Two daily trains to Bangkok take around 15 hours.
• Bus: Regular buses connect Trang with Bangkok, Hat Yai, Phuket, and other locations, with easy access to piers for island transfers.
• Boats: Minibus and boat combos are available to major islands; private transfers can be booked through local agents.

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7. Koh Tao

Koh Tao, nicknamed the turtle island, is a small island located in the Gulf of Thailand, north of Koh Samui and Koh Phangan. Nestled on the east coast of Surat Thani, in Thailand, this island is surrounded by two other neighboring islands, Koh Phangan and Koh Samui.

7.1 Highlights:

• Shark Bay: This bay is reserved for free swimming with blacktip reef sharks, colorful fish, and green turtles. 
• Chalok Baan Kao Bay: This bay is ideal for kayaking, snorkeling, and passing through secret coves. Paddle serenely and perhaps see colorful marine life.
• Sairee Beach: A hot spot of nightlife in the island, with fire shows, loud live music, and a row of bars.
• Mango Bay Viewpoint: A short scooter ride from Sairee Beach, this viewpoint presents dazzling views of the sunrise and sunset over the island.

7.2 Activities:

• Scuba Diving: Koh Tao is a diving paradise for both beginners and advanced divers. Big Blue Diving operates quality certifications and day trips.
• Kayaking: It is rather a good way to explore the coastline of Koh Tao, revealing some of the hidden beaches and coves, great for relaxed days on the water.
• Watch Sunrise and Sunset: Panoramic breathtaking view of Koh Tao at Mango Bay Viewpoint, good vantage point to appreciate the island's natural scenery.

7.3 How to get to Koh Tao:

Traveling to Koh Tao is easy with combined bus and ferry services from Bangkok and Phuket. From Bangkok, you can take an overnight bus to Krabi or Phuket and then hop on a ferry. From Koh Samui, ferries take about 2.5 hours. For faster travel, opt for catamarans or speedboats, which offer multiple daily departures and reduce travel time significantly.

8. Koh Phangan

Koh Phangan is situated in the Gulf of Thailand and includes the Samui archipelago. The island is famous for its snow-white beaches, coral reefs, waterfalls, and vibrant nightlife that comes into its own at Full Moon Parties. The island is popular with digital nomads since it has a great number of cafes with fast Wi-Fi and a cozy workspace.

8.1 Highlights:

• Haad Rin: Known for Full Moon Parties, a lively spot and party place. (For more information, please read: Koh Phangan Full Moon Party Guide)
• Mae Haad Beach: Unique with its sand bridge to Koh Ma, which is great to explore.
• Thong Nai Pan: A serene area and all in all a perfect spot for families and couples alike, having its idyllic beaches.
• Hin Kong Beach: Very famous for its beautiful sunset.
• Than Sadet National Park: Explore waterfalls, natural pools, and jungle trails for a serene nature experience.

8.2 Activities

• Full Moon Party: The world-famous beach party at Haad Rin, filled with music, fire shows, and vibrant energy.
• Hiking: Go to Koh Phangan’s highest peak - Khaora Viewpoint for breathtaking panoramic views.
• Water Sports: Enjoy diving, snorkeling, and kayaking in Koh Phangan’s crystal-clear waters and coral reefs.
• Cultural Experiences: Visit temples like Wat Phu Khao Noi, join meditation retreats, and indulge in yoga and wellness activities.

8.3 How to get to Koh Phangan:

From Bangkok, you can fly to Koh Samui and take a ferry, or take a train to Surat Thani followed by a bus to Donsak Pier and then a ferry. Alternatively, there are direct buses from Bangkok to Donsak or Surat Thani with a ferry transfer.

If you're coming from Koh Tao, ferries take about 1.5-2 hours, and from Surat Thani, it's a bus to Donsak Pier and then a 2-3 hour ferry ride. 

9. Koh Samui

Nestled in the Gulf of Thailand in the southern province of Surat Thani, Koh Samui ranks as Thailand's second-largest island, renowned for its dazzling natural beauty. Its development has made it a popular tourist destination, but it remains essential for all travelers to Thailand.

9.1 Highlights 

• Chaweng and Lamai Beaches: Popular spots with lively scenes, hotels, and dining. Chaweng is vibrant, while Lamai is a quieter alternative.
• Fisherman’s Village: A charming night market in Bophut with souvenirs and street food, held on Monday and Friday nights.
• Plai Laem Temple: A picturesque temple featuring a giant statue of Guanyin, offering a glimpse into local spirituality.
• Ang Thong National Park: A stunning archipelago with pristine beaches, lagoons, and diverse wildlife, perfect for nature lovers.

9.2 Activities

• Scuba diving and snorkeling: The vibrant underwater life is a treat to watch at places like Sail Rock and Ang Thong National Park.
• Kayaking: Paddle through the tranquil waters of Ang Thong National Park.
• Pamper Yourself with a Massage: Enjoy the very best in Traditional Thai massages conducted in tranquil surroundings to soothe the senses and rejuvenate your well-being.
• Sunset Watching: Beautiful sunsets viewed at Lipa Noi are really quiet, thus making it good for unwinding.

9.3 How to get to Koh Samui:

Fly directly from Bangkok, Chiang Mai, or Southeast Asian cities to Koh Samui International Airport. Alternatively, fly to Surat Thani or Nakhon Si Thammarat, then continue by bus and ferry. Budget-friendly options include bus or train from Bangkok to Surat Thani, followed by a ferry.

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10. Koh Chang

Koh Chang, Thailand's third-largest island, is located in the eastern Gulf of Thailand in Trat province, about 350 km from Bangkok. Known for its diverse ecosystem, the island is covered in lush forests, white sand beaches, waterfalls, and mountains. Its name, "Koh Chang," means "Elephant Island," inspired by its elephant-like shape on the map.

10.1 Highlights:

• White Sand Beach: The most popular beach, lined with resorts, restaurants, and bars.
• Klong Prao Beach: A quieter, long stretch of sand perfect for walks and relaxation.
• Lonely Beach: A laid-back spot popular with backpackers, offering budget accommodations.
• Bang Bao Fishing Village: A peaceful village with floating markets, old lighthouses.

10.2 Top Activities:

• Diving at HTMS Chang Wreck: Explore Thailand's longest wreck, now a thriving coral reef and marine habitat, recommended for experienced divers.
• Klong Plu Waterfall: A scenic waterfall accessible by a short hike, ideal for a nature break.
• Forest Walks with Elephants: Visit conservation areas to see elephants in their natural habitat.
• Muay Thai, Yoga, and Cooking Classes: Enjoy yourself in Thai culture with activities like boxing, yoga, and cooking.

10.3 How to get to Koh Chang:

If you prefer flying, you can catch a quick flight from Bangkok to Trat. 

Alternatively, if you enjoy scenic road trips, you can take a bus or minibus from Bangkok’s Eastern Bus Terminal (Ekkamai) directly to Laem Ngop. From there, it's just a short ferry ride to the island.

>>> Read more: Koh Chang, Thailand: A Journey to the Tranquility of Elephant Island 🐘🌴

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FAQs

1. What is the best island in Thailand for families?

• Koh Samui is fitting for families due to the resorts that cater specifically to families, very safe beaches, and other activities like elephant sanctuaries and water parks for a joyous vacation with the whole family.
• Phuket also offers a great deal of variety in the different kinds of attractions suitable for families, from theme parks to aquariums, where calm beaches like Kata Beach come in quite useful for kids and parents alike.
• Koh Lanta: Due to its tranquility, beaches that are not very crowded, snorkelling, and exploration of the national park, this makes for an ideal holiday outing where families can enjoy tranquillity and adventure combined.

2. What is the best island in Thailand for couples?

• Koh Lipe: Known for its romantic seclusion, stunning sunsets, and intimate resorts, making it an ideal destination for couples looking for a serene getaway.
• Koh Phi Phi: Offers iconic landscapes, private beach experiences, and the romantic allure of Maya Bay, perfect for couples wanting a mix of adventure and relaxation.
• Krabi: Features serene beaches, luxury resorts, and attractions like the Emerald Pool and boat tours to nearby islands, providing couples with both relaxation and exploration opportunities.

3. What is the best island in Thailand for diving?

• Koh Tao: Renowned for its excellent diving spots with vibrant coral reefs and diverse marine life, making it ideal for both beginner and experienced divers.
• Similan Islands: A premier diving destination in the Andaman Sea, known for its clear waters, underwater rock formations, and abundant sea life.
• Koh Lanta: Offers access to some of Thailand’s top dive sites, including Hin Daeng and Hin Muang, known for pelagic species like manta rays and whale sharks.

4. Which are the party islands in Thailand?

• Koh Phangan: Famous for its Full Moon Parties, beach clubs, and vibrant nightlife on Haad Rin Beach, attracting partygoers from around the world.
• Phuket: Patong Beach is the epicenter of nightlife in Phuket, with numerous clubs, bars, and lively beach parties.
• Koh Samui: Chaweng Beach offers a bustling nightlife scene with a mix of bars, clubs, and special beach events.

5. Which island in Thailand is not touristy?

• Trang Islands: These islands, like Koh Muk and Koh Kradan, are quieter alternatives with pristine beaches and a laid-back atmosphere.
• Koh Lanta Noi: Offers a more traditional and less crowded experience compared to its sister island, Koh Lanta Yai.
• Koh Kood: Known for its untouched beauty, clear waters, and peaceful vibe, Koh Kood is perfect for those seeking solitude away from tourist hotspots.

6. Which Thai islands can you fly directly to?

• Phuket: Accessible with direct international flights from many major cities.
• Koh Samui: Has an airport with direct flights from Bangkok, Singapore, and select international locations.
• Krabi: Offers direct connections from Bangkok and several international destinations, providing easy access to nearby islands.

Our last words, 

Located along the majestic Andaman coast and the Gulf of Thailand, it is no wonder that Thailand is a true island paradise with hundreds of islands, large and small. The islands of Thailand are truly the ultimate jewel of this magnificent tourist destination.
If you have not yet had the opportunity to explore Thailand, consider planning a vacation in this country and choose one of the islands mentioned above for an incredible experience. Whatever your choice, you will not be disappointed by the islands you will visit.

>>> Also read:

• Thailand’s 10 Most Spectacular National Parks 
• The Best Places and Hotels to Stay in Phuket 
• What to Bring back From Thailand? The 17 Must-See Thai Souvenirs 
• Thai Beers: Discover Thailand in a Different Way