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Top 10 Islands in Thailand: Which One Should You Visit First?

From buzzing beach parties to quiet coral-fringed shores, islands in Thailand offer every kind of getaway. With over 1,400 islands spread across the Andaman Sea and the Gulf of Thailand, each destination delivers something unique, be it scuba diving in Koh Tao, luxury in Koh Samui, or vibrant nightlife on Koh Phangan. 

Let’s explore the top 10 islands in Thailand for tourists, what to do on each, when to visit, and how to make the most of your tropical adventure.

Let’s dive into the highlights of each island and find out which one suits your next tropical getaway best.

1. Phuket

Phuket

Phuket is Thailand’s largest island, famous for its lively beaches, nightlife, and family-friendly resorts. It offers a mix of culture, luxury, and adventure all in one place.

It’s ideal for first-time visitors looking for a complete Thai island experience. The island also connects easily to smaller nearby islands.

  • Weather: 24 – 34°C
  • Location: Phuket, Andaman Sea, Southern Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Visit Patong Beach for nightlife and water sports.
    • Explore the Big Buddha and Old Phuket Town.
    • Go island hopping to Phi Phi and the James Bond Islands.
    • Take a Thai cooking class near the beach.

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2. Koh Samui

Koh Samui

Koh Samui blends luxury with laid-back island vibes. It’s known for its white sandy beaches, waterfalls, and buzzing beach clubs. Perfect for couples, honeymooners, and families wanting a mix of comfort and local charm.

  • Weather: 25 – 33°C
  • Location: Koh Samui, Gulf of Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Relax on Chaweng or Lamai Beach.
    • Visit the Big Buddha Temple.
    • Enjoy a spa day at a beachfront resort.
    • Explore Ang Thong Marine Park.

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3. Koh Phi Phi

Koh Phi Phi

Koh Phi Phi is a postcard-perfect island famous for Maya Bay and its dramatic cliffs. It’s ideal for adventure lovers and beach parties. A must-visit for backpackers and thrill-seekers looking for fun and natural beauty.

  • Weather: 24 – 32°C
  • Location: Ao Nang, Mueang Krabi District, Krabi, Thailand
  • Timings: Daytime visits are best
  • Entry Fee: THB 400 (Maya Bay Fee)
  • What to do:
    • Snorkel or scuba dive around the reefs.
    • Hike to Phi Phi Viewpoint.
    • Take a long-tail boat tour to hidden beaches.
    • Enjoy the vibrant beach parties at night.

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4. Koh Lanta

Koh Lanta

Koh Lanta offers a quiet, less touristy vibe, ideal for relaxing beach vacations. It features long stretches of sand and cozy seaside bungalows. Families and solo travelers love its peaceful setting and warm hospitality.

  • Weather: 25 – 34°C
  • Location: Ko Lanta District, Krabi 81150, Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Visit Mu Ko Lanta National Park.
    • Try kayaking in the mangroves.
    • Explore Lanta Old Town.
    • Relax on Klong Dao Beach.

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5. Koh Tao

Koh Tao

Koh Tao is a diver’s paradise with clear waters and affordable dive schools. It’s popular among beginners and pros alike. The island also features scenic viewpoints and peaceful beaches that are perfect for non-divers.

  • Weather: 26 – 32°C
  • Location: Gulf of Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Learn scuba diving from certified schools.
    • Hike to John-Suwan Viewpoint.
    • Snorkel at Shark Bay.
    • Chill at Sairee Beach cafés.

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6. Koh Phangan

Koh Phangan

Koh Phangan is famous for its Full Moon Party, attracting party lovers from around the world. But it also has quiet beaches for a peaceful stay. Ideal for both partygoers and digital nomads looking for nature.

  • Weather: 26 – 33°C
  • Location: Ko Pha-ngan District, Surat Thani 84280, Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Attend the Full Moon Party.
    • Discover hidden beaches like Haad Yuan.
    • Go hiking to waterfalls.
    • Visit yoga and wellness retreats.

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7. Similan Islands

Similian Islands

The Similan Islands are among the best dive spots in Thailand, with crystal-clear waters and rich marine life. It’s a national park and protected area.

A seasonal destination perfect for divers and nature lovers.

  • Weather: 27 – 31°C
  • Location: Lam Kaen, Phang Nga, Thailand
  • Timings: Open Nov–May
  • Entry Fee: THB 500
  • What to do:
    • Dive or snorkel with manta rays and turtles.
    • Go island hopping on a speedboat tour.
    • Enjoy bird watching and hiking.
    • Relax on untouched beaches.

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8. Koh Lipe

Koh Lipe

Koh Lipe is a small island known for its turquoise waters and coral reefs. Often called the Maldives of Thailand, it’s romantic and relaxing. Perfect for couples and snorkelers who want a peaceful escape.

  • Weather: 26 – 32°C
  • Location: Satun, Thailand
  • Timings: Anytime
  • Entry Fee: THB 200 (Marine Park Fee)
  • What to do:
    • Snorkel directly from the beach.
    • Enjoy seafood at beachside restaurants.
    • Stroll along Walking Street.
    • Watch stunning sunsets at Sunset Beach.

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9. Koh Chang

Koh Chang

Koh Chang is Thailand’s second-largest island and offers a mix of jungle, waterfalls, and beaches. It’s less crowded than Phuket but still lively. Adventurous travelers and families love its natural beauty.

  • Weather: 25 – 33°C
  • Location: Trat, Eastern Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Trek to Klong Plu Waterfall.
    • Kayak through mangroves.
    • Ride elephants at ethical sanctuaries.
    • Chill at White Sand Beach.

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10. Koh Yao Noi

Koh Yao Noi

Koh Yao Noi is peaceful and scenic, located between Phuket and Krabi. It’s perfect for escaping crowds and enjoying village life. Couples and solo travelers enjoy its eco-friendly and calm vibe.

  • Weather: 25 – 32°C
  • Location: Ko Yao District, Phang Nga, Thailand
  • Timings: Anytime
  • Entry Fee: Free
  • What to do:
    • Take a boat tour around limestone cliffs.
    • Explore by bicycle through rice fields.
    • Experience a local Thai cooking class.
    • Enjoy kayaking at sunrise.

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FAQs

How many islands are there in Thailand?

Thailand has over 1,400 islands spread across the Andaman Sea and the Gulf of Thailand. Many are popular tourist destinations.

What are the most famous islands in Thailand?

Phuket, Koh Samui, Koh Phi Phi, and Koh Lanta are among the most famous islands known for their beaches and nightlife on Thailand islands.

Are the Thailand islands open to tourists?

Yes, most islands are open to tourists year-round, with varying entry restrictions depending on the location.

Are there any free islands in Thailand that you can visit?

Yes, many islands like Koh Lipe and Koh Tao have public beaches with free access, though activities may have charges.

Which is the most luxurious island in Thailand?

Phuket is considered the most luxurious, with high-end resorts, private villas, and premium beachfront amenities.

Which Thailand island is best for families?

Koh Samui is ideal for families with its calm beaches, resorts, and family-friendly attractions like water parks.

What activities can you do on Koh Phi Phi?

You can snorkel, take boat tours, hike to viewpoints, and enjoy vibrant nightlife and beachside dining.

What is the cost of staying on the islands in Thailand?

Costs vary by island and accommodation type, ranging from budget hostels at $10 to luxury resorts over $500 per night.