Best Islands To Visit in Thailand: Complete Guide 2025

Best islands in Thailand? If you’re anything like me, the mere mention of “Thai island” conjures up visions of turquoise waters, swaying palm trees, and the kind of chill vibes that just make your soul sing. And trust me, I’ve seen my fair share of them. After years of exploring this incredible country, clambering over limestone cliffs, and diving into crystal clear waters, I’m here to spill the beans on the ultimate 15 Thai islands you have to consider for your next holiday.

Forget the generic brochures, folks. This isn’t just a list; it’s a deep dive into the heart of what makes each of these gems uniquely special. I’m talking about the places I’ve kicked off my flip-flops, sampled the street food, and danced under the full moon. So, grab a fresh coconut, crank up some reggae, and let’s get ready to plan your perfect island escape in Southeast Asia!

The Gulf of Thailand Gang: East Coast Wonders

We’re kicking things off on the east coast, where the Gulf of Thailand serves up some of the most iconic and diverse island experiences.

1. Koh Samui: The OG of Island Bliss (and a little bit of everything!)

Let’s start with a classic, shall we? Koh Samui isn’t just a name; it’s a vibe. This is one of the largest islands in the Gulf and a true all-rounder. Think stunning resorts, bustling markets, and a lively party scene if you know where to look. I’ve spent countless evenings soaking up the atmosphere on Chaweng Beach, with its vibrant energy and fire shows. But don’t be fooled by the buzz; you can also find serene coves and quiet corners for pure relaxation.
What I love about Koh Samui is its accessibility. With its own international airport, it’s super easy to get to, making it a popular choice for those looking for a seamless start to their island adventure. Beyond the beaches, you can explore impressive Buddhist temples, visit ethical elephant sanctuaries, or get lost in lush coconut groves. It’s a great island for everyone, from families to solo adventurers.

2. Koh Phangan: More Than Just the Full Moon Party!

Ah, Koh Phangan. For many, this Thai island is synonymous with the legendary Full Moon Party on Haad Rin Beach. And yes, I’ve definitely had my share of unforgettable nights there, dancing till sunrise with thousands of fellow travelers. The energy is absolutely electric, and it’s truly a rite of passage for many visiting Southern Thailand.

But here’s the secret: Koh Phangan is so much more than a party island. Venture away from the main party spots, and you’ll discover pristine beaches like Bottle Beach, tranquil yoga retreats, and lush jungle treks leading to breathtaking waterfalls. I remember one time, after a particularly epic Full Moon Party, I spent the next day exploring the quieter side of the island, and it was pure bliss. It’s a great place to find balance – a little bit of wild, a little bit of zen.

3. . Koh Tao: The Underwater Wonderland

If you’re a fan of what lies beneath the surface, then Koh Tao is your calling. Known as “Turtle Island,” this small islandis a global hotspot for scuba diving and snorkeling. The crystal clear waters are teeming with vibrant coral reefs and incredible marine life, from colorful fish to majestic sea turtles and even the occasional manta rays.
I’ve done some of my most memorable dives here, exploring underwater pinnacles and swimming through schools of barracuda. Even if you’re not a diver, the snorkeling is phenomenal, especially around the unique triple-island formation of Koh Nang Yuan, just a short day trip away. It’s truly one of the best places to experience Thailand’s underwater beauty.

4. Koh Chang: The Wild East (and my personal favorite for raw beauty!)

Heading further east, close to the Cambodian border, you’ll find Koh Chang, Thailand’s second largest island. This one holds a special place in my heart because it still retains a wonderfully authentic, untamed feel. It’s less developed than Samui, with rugged jungle-clad mountains, dramatic waterfalls, and miles of relatively untouched white sandy beaches.

I’ve spent weeks on Koh Chang, hiking through dense mangrove forests, discovering hidden coves, and riding my scooter along winding coastal roads. The main beach of White Sand Beach offers plenty of amenities, but venture further south to places like Lonely Beach for a more laid-back, bohemian vibe. It’s a fantastic blend of adventure and relaxation, and the natural beauty here is simply captivating.

5. Koh Kood: The Unspoiled Gem

Just a hop, skip, and a boat jump from Koh Chang is Koh Kood, often hailed as one of Thailand’s most beautiful and unspoiled islands. If you’re looking for absolute tranquility, picture-perfect white-sand beaches, and a feeling of stepping back in time, this is it. There are no crowds, just pure, unadulterated paradise.

I remember kayaking through emerald green canals, discovering secluded waterfalls like Klong Chao, and simply basking in the peace and quiet. The resorts here tend to be a bit more upscale, focusing on luxury and serenity, making it an ideal choice for a romantic getaway or anyone craving a truly peaceful escape. The turquoise waters here are something else!

READ MORE: BEST THAILAND LOCAL FOOD 2025 FULL GUIDE

6. Koh Mak: Laid-Back Charm

Nestled between Koh Chang and Koh Kood, Koh Mak offers a delightful balance. It’s incredibly relaxed and low-key, perfect for those who want to unwind without being completely isolated. The island is relatively flat, making it great for cycling, and you’ll find plenty of charming guesthouses and boutique resorts.
I loved exploring the rubber plantations and small fishing villages, getting a glimpse into local life. The beaches, like Ao Kao, are stunning, and the vibe is all about easy living. It’s a fantastic spot for families or couples seeking a quiet, authentic Thai island experience.

7. Koh Samet: The Bangkok Escape

For a quick and easy getaway from Bangkok, Koh Samet is your answer. Located in the Rayong province, it’s just a short drive and ferry ride, making it a popular weekend destination for locals and expats. While it can get busy, especially on weekends, it offers gorgeous white sandy beaches and lively beachfront restaurants and bars.

I’ve popped over to Koh Samet for a quick beach fix more times than I can count. It’s perfect if you’re short on time but desperately need some sun and sand. Haad Sai Kaew is the most popular beach, but venture slightly further for quieter coves.

The Andaman Sea All-Stars: West Coast Wonders

Now, let’s swing over to the west coast and dive into the breathtaking Andaman Sea, home to some of Thailand’s most iconic and dramatic landscapes.

8. Phuket: The Grand Dame (Thailand’s Largest Island!)

You can’t talk about Thai islands without mentioning Phuket. As the largest island in Thailand, it’s a powerhouse of tourism, offering everything from luxurious resorts to bustling nightlife, and stunning beaches. While some areas, like Patong Beach, can be quite lively and geared towards a party scene, Phuket also boasts incredibly beautiful and serene areas.

I’ve used Phuket as a hub for countless day trips to nearby islands. It has an international airport, making it super convenient. Beyond the party, explore the charming Old Town, visit the Big Buddha, or enjoy some incredible street foodat local markets. It’s a popular destination for a reason – it caters to absolutely everyone.

9. Phi Phi Islands: Postcard Perfect (and worth the hype!)

The Phi Phi Islands are probably what comes to mind when you picture a Thai paradise – and for good reason! The towering limestone cliffs, emerald bays, and iconic Maya Bay (of “The Beach” fame) are simply breathtaking. While Koh Phi Phi Don is the main island where you’ll find accommodation and a lively atmosphere, the real magic lies in the surrounding smaller islands.

I’ve taken countless boat trips around the Phi Phi archipelago, snorkeling in hidden lagoons and marveling at the sheer beauty of Koh Phi Phi Leh. Yes, it can get crowded, especially in high season, but getting out early for a day trip to Maya Bay (which has had stricter visitor caps in recent years to protect its fragile ecosystem) or finding a secluded spot for swimming makes it all worthwhile. It’s undoubtedly one of the most beautiful islands.

10. Koh Lanta: Laid-Back & Lovely

If the bustling energy of Phuket or Phi Phi isn’t quite your speed, then Ko Lanta is your sanctuary. This long, slender island offers a wonderfully relaxed vibe with miles of stunning long beach stretches, lush interiors, and a welcoming community. It’s a fantastic choice for families, couples, or anyone seeking a slower pace.
I adore the sunsets on Ko Lanta – they’re some of the best I’ve ever seen. You can rent a scooter and explore the various beaches, from the lively Klong Dao to the serene Bamboo Beach near the national park. Don’t miss exploring Lanta Old Town, a charming village with traditional stilt houses and great seafood restaurants. It’s easily one of the best islands for unwinding.

11. Koh Lipe: The Maldives of Thailand

Prepare to have your jaw drop. Koh Lipe, located in the far south of the Andaman Sea within the Tarutao National Park, is often called the “Maldives of Thailand” – and it lives up to the name. Its pristine beaches with incredibly soft white sand beaches and vibrant coral reefs make it a diver’s and snorkeler’s dream.

YOU MIGHT LIKE IT: 12 RECOMMENDATION YOGA STUDIO – TOP PICKS 2025

I remember my first glimpse of Sunrise Beach – the colors were unreal! It’s a small island that you can easily walk across, and the main walking street is packed with charming restaurants and dive shops. While it’s gaining popularity, it still feels wonderfully remote. A day trip to nearby smaller islands like Koh Adang for hiking to a viewpoint or the famous Jabang Coral Reef for snorkeling is an absolute must. It’s truly one of the top islands for sheer natural beauty.

12. Similan Islands: The Diver’s Paradise (National Park Gem!)

For serious divers and snorkelers, the Similan Islands are practically sacred. This archipelago, a protected national park, consistently ranks among the top dive sites in the world. Accessible mainly by liveaboard boats or day tours from Khao Lak, these islands boast incredible underwater visibility and an abundance of marine life, including whale sharks and manta rays.
I’ve been lucky enough to dive here, and the sheer scale of the coral reefs and the diverse marine ecosystem is mind-blowing. The granite boulders rising from the sea and the blindingly white sand beaches are equally impressive. Keep in mind that access is limited to protect the fragile environment, and it’s typically closed during the rainy season (May to October). This is the crème de la crème for underwater exploration.

13. Koh Yao Noi & Koh Yao Yai: The Serene Phang Nga Bay Gems

Tucked away in the stunning Phang Nga Bay, between Phuket and Krabi, are the sister islands of Koh Yao Noi and Koh Yao Yai. These islands offer a peaceful, authentic Thai experience, with a backdrop of dramatic limestone cliffs rising from the emerald waters – think a less crowded version of the scenery around James Bond Island (Khao Phing Kan, also known as Ko Tapu from The Man with the Golden Gun, which you can visit on a day trip from here!).

I’ve loved exploring these islands by scooter, winding through rubber plantations and quiet villages. Koh Yao Noi is a bit more developed with charming boutique resorts, while Koh Yao Yai is even more untouched. They are great placesfor kayaking through mangrove forests, relaxing on quiet beaches, and enjoying the stunning bay views. If you want to escape the crowds and immerse yourself in local culture, these are your spots.

14. Koh Mook: Emerald Cave Enchantment

Part of the Trang province, Koh Mook is a hidden gem known for its incredible Emerald Cave (Tham Morakot). This magical sea cave opens up to a hidden lagoon with a small, white sand beach surrounded by towering cliffs. You swim through a dark tunnel, and then suddenly, you emerge into this secret paradise. It’s an absolutely unforgettable experience!

I’ve done the Emerald Cave swim, and it feels like something out of a movie. Beyond the cave, Koh Mook offers a laid-back atmosphere, a charming local village, and lovely beaches like Hat Farang (Sunset Beach), perfect for watching the sun dip below the horizon. It’s one of the more unique different islands to visit.

15. Koh Kradan: Postcard Perfection Personified

Also in the Trang archipelago, Koh Kradan is another slice of pure paradise. It’s a small island with arguably some of the most stunning pristine beaches in Thailand. The water is incredibly clear, and the long stretch of long beach on the east coast is simply breathtaking, perfect for swimming and snorkeling right off the shore.
I spent a peaceful afternoon on Koh Kradan, feeling like I had stumbled upon a real-life desktop background. There are very few amenities here, making it ideal for those who truly want to disconnect and soak up the natural beauty. It’s also a popular stop on day tours from nearby islands like Koh Lipe or Koh Lanta. If your idea of a perfect holiday involves nothing but sun, sand, and turquoise water, this is it.

Travel time between Islands

Thailand’s islands are well-connected by a network of ferries and speedboats, making island hopping a popular and relatively easy way to explore the country’s stunning coastlines. Travel times can vary depending on the type of boat (slow ferry vs. speedboat/catamaran), sea conditions, and the specific route.

Here’s a general timetable for popular routes between some of Thailand’s main island groups:

Andaman Coast (West Coast)

This region includes popular islands like Phuket, Koh Phi Phi, Krabi (mainland hub), Koh Lanta, and further south, Koh Lipe.

• Phuket to Koh Phi Phi:Ferry: Approximately 1 to 2 hours (some can be up to 3 hours depending on the operator and stops).Speedboat: As fast as 45 minutes to 1 hour.Note: Many ferries from Phuket to Phi Phi will take a short sightseeing trip around Phi Phi Ley Island (including Maya Bay) before arriving at Tonsai Bay.
• Krabi (Klong Jilad Pier) to Koh Phi Phi:Ferry: Approximately 1 hour 30 minutes.Speedboat: Around 1 hour 15 minutes.
• Ao Nang (Krabi) to Koh Phi Phi:Ferry: Approximately 2 hours.Speedboat: As fast as 50 minutes.
• Koh Phi Phi to Koh Lanta:Ferry: Approximately 1 to 1.5 hours. Note: This route is generally only available during high season (November to April).
• Krabi (Klong Jilad Pier) to Koh Lanta:Ferry: Approximately 1 hour 30 minutes to 2 hours 45 minutes, depending on the service and stops. Speedboat: As fast as 1 hour.Note: There are also minivan + car ferry options which take longer (around 3.5 hours) but can be cheaper.
• .
• Phuket to Koh Lanta:Ferry (via Phi Phi): Around 2-3 hours (including the stop at Phi Phi). Some direct speedboats may be faster.
• Koh Lanta to Koh Lipe (Southern Andaman):Speedboat: Approximately 3-4 hours, often with stops at islands like Koh Ngai, Koh Kradan, and Koh Mook. This route is typically only available during high season.
• Gulf of Thailand (East Coast) This region includes islands like Koh Samui, Koh Phangan, and Koh Tao.
• Koh Samui to Koh Phangan: High-speed ferry/Catamaran (e.g., Lomprayah): Approximately 30 minutes to 1 hour, depending on the pier.Speedboat: Can be as quick as 20-30 minutes.
• Koh Phangan to Koh Tao:High-speed ferry/Catamaran (e.g., Lomprayah): Approximately 1 hour to 1 hour 30 minutes.Speedboat: Can be faster, around 30 minutes to 1 hour.
• Koh Samui to Koh Tao (often via Koh Phangan):High-speed ferry/Catamaran: Approximately 2 to 3 hours.
• Surat Thani (mainland) to Koh Tao : Combined bus + ferry/speedboat: Can take 4 to 5 hours or more.

Important Considerations:

• High Season (November to May): More frequent services, more direct routes, and generally calmer seas.
• Low Season (June to October): Services can be reduced or even suspended due to rougher seas and strong winds. Some routes might require transfers back to the mainland. Always check schedules in advance during this period.
• Weather: Sea conditions can impact travel times and even lead to cancellations. Always factor in potential delays, especially if you have connecting flights.
• Operators: Different ferry and speedboat companies (e.g., Lomprayah, Andaman Wave Master, Tigerline Ferry, Bundhaya Speedboat, Seatran Discovery) have varying speeds, comfort levels, and departure times.
• Pier Locations: Be aware that islands often have multiple piers, so confirm your departure and arrival points. Transfers to/from piers can add significant travel time, especially in busy areas like Phuket or Krabi Town.
• Booking: During peak season, it’s advisable to book your tickets in advance, especially for popular routes. Online booking platforms are readily available.
• This table provides a general overview. For precise and up-to-date schedules, it’s always best to check with local tour operators, your accommodation, or reputable online ferry booking websites shortly before your travel dates

Understanding Southern Thailand’s Climate:

Southern Thailand is divided by its geography into two main coastlines, each influenced by different monsoon winds:

Andaman Sea Coast (West Coast):

This includes popular destinations like Phuket, Krabi (Ao Nang, Railay), Koh Phi Phi, Koh Lanta, Khao Lak, and further south, Koh Lipe.

Best Time to Visit

• (Dry Season): November to April
  • Weather: This is the prime time, with sunny days, clear blue skies, and calm, crystal-clear seas. Temperatures are warm, typically ranging from 25°C to 34°C (77°F to 93°F), with pleasant breezes. Humidity is lower.
  • Activities: Perfect for swimming, sunbathing, snorkeling, diving, island hopping, and enjoying all water-based activities. This is also peak tourist season, so expect more crowds and higher prices for accommodation and flights.
• Monsoon Season (Wet Season): May to October
  • Weather: The southwest monsoon brings heavier and more consistent rainfall, particularly from June to September. Expect daily downpours, often short but intense, followed by sunshine. Seas can be rougher, and boat services may be limited or cancelled. Humidity is high.
  • Activities: While less ideal for beach holidays, it’s still possible to visit. There are fewer tourists, lower prices, and the landscapes are incredibly lush and green. Good for exploring waterfalls, jungle trekking (though some trails might be muddy), and enjoying resorts with good facilities. Some islands, like Koh Lanta, become much quieter.
• Gulf of Thailand Coast (East Coast): This side features islands like Koh Samui, Koh Phangan, and Koh Tao.
  • Best Time to Visit (Dry Season): December to AugustWeather: This side experiences its best weather when the Andaman side is in monsoon. You’ll find plenty of sunshine, calm seas, and less rain. Temperatures are consistently warm, similar to the Andaman coast.Activities: Ideal for beach holidays, snorkeling, diving (especially around Koh Tao which is famous for it), and exploring the islands. January and February are generally the driest months.
  • Weather: This side experiences its best weather when the Andaman side is in monsoon. You’ll find plenty of sunshine, calm seas, and less rain. Temperatures are consistently warm, similar to the Andaman coast.
  • Activities: Ideal for beach holidays, snorkeling, diving (especially around Koh Tao which is famous for it), and exploring the islands. January and February are generally the driest months.
• Monsoon Season (Wet Season): September to November/Early December
  • Weather: The northeast monsoon brings the most significant rainfall to the Gulf coast during these months, with November often being the wettest. Expect heavy showers, and occasionally rough seas.
  • Activities: Similar to the Andaman’s wet season, expect fewer tourists and potentially lower prices. It’s still possible to visit, but be prepared for rain.

In Summary:

• For the West Coast (Phuket, Krabi, Phi Phi, Lanta): Visit between November and April.
• For the East Coast (Samui, Phangan, Tao): Visit between December and August.

If your trip spans a longer period or you’re flexible, you can “chase the sun” by moving between the coasts to enjoy optimal weather year-round in Southern Thailand.

Choosing Your Funky Fresh Adventure: Tips from Eric!

So, there you have it, my Funky Fresh Fam – 15 incredible Thai islands to spark your wanderlust! Now, how do you pick the best time to go and which ones are for you?

• Best Time to Visit: Generally, the dry season (November to February) offers the best weather with clear skies and calm seas, especially in the Andaman Sea. However, this is also high season, meaning more crowds and higher prices. The Gulf of Thailand islands can have slightly different weather patterns, sometimes offering good conditions when the Andaman is experiencing its rainy season.
• Andaman vs. Gulf: The west coast (Andaman) is known for its dramatic limestone cliffs and iconic scenery (think Krabi, Phuket, Phi Phi). The east coast (Gulf) tends to have calmer waters and a slightly different vibe. Both are incredible, so it often comes down to what kind of experience you’re seeking.
• Party or Peace? Thailand truly has it all. If you’re looking for a lively party island, Koh Phangan and some areas of Koh Samui and Phuket (like Patong Beach) will deliver. For ultimate tranquility, head to Koh Kood, Koh Mak, or Koh Kradan.
• Getting Around: Island hopping is super easy thanks to a network of ferries and longtail boat services. From major hubs like Phuket or Surat Thani (for the Gulf islands), you can easily reach many of these main islands and their nearby islands for day tours.

No matter which of these different islands you choose, remember that the best things about a Thai island holiday are the experiences you create, the delicious street food you devour, and the vibrant culture you immerse yourself in.

So, what are you waiting for? Start dreaming, start planning, and get ready for your own Funky Fresh adventure in the tropical paradise that is Thailand! Trust me, these islands will capture your heart. See you on the sand!

WHO AM I ?

Hello !

I am Eric, a French Australian citizen based between Australia, Asia and Bali and I love to travel and experience the world. I generally like outdoor activities, wellness, great food and venues , party and real local adventures ! I am a Yoga practitioner and fitness lover

I created this blog because I love to travel and I want to share my experiences with others. I’ve been traveling since I was a child, and I’ve been to over 50 countries. I’ve seen some amazing things and met some amazing people, and I want to help others experience the same things.

I believe that travel is one of the best ways to learn about the world and about yourself. When you travel, you’re forced to step outside of your comfort zone and experience new things. You learn about different cultures, different religions, and different ways of life. You also learn about yourself, your strengths, and your weaknesses.

Travel can also be a great way to make new friends. When you’re traveling, you’re surrounded by people from all over the world, and you’re all in the same boat. You’re all there to explore and experience new things, and that can create a bond between people.

Let’s connect together !

I hope that my travel blog will inspire others to travel and to see the world. I also hope that it will help people to learn about different cultures and to become more open-minded.