29 Must-Visit Islands in Thailand: Travel Guide to Plan Your Trip!

Whether you’re looking to explore the rich culture at various places to visit in Thailand or unwind on some of the best islands in Thailand, there’s something here for everyone. With a diverse range of attractions and activities, it’s crucial to know the best time to visit Thailand to fully enjoy what this vibrant country has to offer. Get ready to be captivated by the beauty, culture, and spirit of Thailand!

Let’s Explore The 29 Best Diving Islands in Thailand

1. Koh Phayam

Visitors can enjoy its golden sands and blue waters, which are bordered by gently swaying palm trees. The island is safe, with helpful locals and virtually no crime, making it one of the best islands in Thailand for a peaceful vacation.

Location

Koh Phayam is situated in Ranong, in southern Thailand.

Best Time to Visit

The ideal time to visit Koh Phayam is from November to April when the weather is most favourable for beach activities and exploring.

Things to Do

Relax on the island’s immaculate beaches, explore its untouched natural beauty on foot, or engage in water sports in the clear blue waters.

2. Koh Similan

The area is also known for its striking landscape, featuring large rock boulders on the western and southern shores, which dramatically contrast with the white sandy beaches. Visitors can explore these natural wonders by yacht or tour boat, adding to the allure of these beautiful Thailand beach islands.

Location

Koh Similan is located 84 km northwest of Phuket in the Andaman Sea.

Things to Do

Dive into the clear waters to explore colourful coral reefs, or enjoy sailing around the islands with arranged yacht and tour boat services.

Best Time to Visit

The optimal time to visit Koh Similan is in December and early January, when the weather is ideal for water activities and beach exploration.

3. Koh Yao Yai

The island’s pace is leisurely, focusing on eco-sustainability rather than bustling nightlife or luxury accommodations, earning it the World Legacy Award for its environmental homestay programs. This makes it one of the best islands in Thailand for visitors seeking a sustainable and peaceful retreat.

Location

Situated in the beautiful Phang Nga Bay, Koh Yao Yai offers stunning natural scenery and a calm environment.

Things to Do

Participate in exciting water activities, relax in the slow-paced environment, and engage with the community through environment-friendly homestay programs.

Best Time to Visit

The ideal period to visit Koh Yao Yai is from December to March, offering the most pleasant weather for enjoying the diverse activities available on one of the top snorkelling islands in Thailand.

4. Koh Yao Noi

The absence of Wi-Fi and modern amenities enhances its untouched charm, making it an ideal destination for visitors who truly want to escape from everyday digital distractions. It’s also recognized as one of the family-friendly islands in Thailand, offering a peaceful retreat for all ages.

Location

Located in the stunning Phang Nga Bay, Koh Yao Noi provides a picturesque escape from the usual tourist paths.

Things to Do

Relax on pristine beaches, enjoy the natural beauty without the interruption of hawkers, and truly unplug from the digital world in this calm setting.

Best Time to Visit

The best time to visit Koh Yao Noi is from December to March, when the weather is most favourable for beach activities and outdoor relaxation, making it an excellent choice for those seeking places to stay in Thailand islands  away from the typical tourist spots.

5. Koh Phi Phi Don

Location

Situated in Ao Nang, Koh Phi Phi Don is easily accessible and a prime spot for those seeking a picturesque retreat.

Things to Do

Explore its pristine beaches, marvel at unique geological formations, and dive into vibrant underwater adventures.

Best Time to Visit

The optimal time to visit Koh Phi Phi Don is from November to April when the weather is ideal for enjoying the island’s natural attractions and outdoor activities.

6. Koh Jum

The island is dotted with charming bungalow resorts nestled along its rocky beaches. Koh Jum is perfect for visitors who want to relax completely, with no schedule to follow. Here, you can truly embrace being a beach bum, soaking up the sun and scenery without any distractions, making it an ideal island getaway in Thailand.

Location

Koh Jum is situated near Krabi Town, easily accessible yet away from the usual tourist trails.

Things to Do

Enjoy the simplicity of beach life, relax in a bungalow by the sea, and let time slow down as you absorb the natural beauty around you.

Best Time to Visit

The best time to visit Koh Jum is from December to April, when the weather is sunny and pleasant, perfect for beach lounging and enjoying the peaceful outdoor environment.

7. Koh Muk

The pristine beaches provide stunning views of the Andaman Sea, ideal for photographers and nature lovers alike. For visitors wanting to extend their stay, there are beachfront resorts that offer breathtaking vistas, and the island’s location near Koh Kradan and Ngai makes it perfect for beach hopping.

Location

Koh Muk is located in Trang in the southern part of Thailand.

Things to Do

Relax on quiet beach resorts in Thailand, capture beautiful landscapes with your camera, and explore nearby islands.

Best Time to Visit

The ideal time to visit Koh Muk is from December to March, when the weather is most favourable for beach activities and enjoying the serene environment.

8. Koh Kradan

The island features four main beaches, each known for its unique charm from Ao Niang’s pristine 800-metre stretch to Ao Pai’s intimate setting and the west coast’s stunning sunsets. Koh Kradan encapsulates the serene beauty typical of Thailand island retreats and it is one of the best beaches in Thailand.

Location

Koh Kradan is located in the Kantang District, Trang, in the serene waters of the Andaman Sea.

Things to Do

Snorkel in the shallow waters, relax on diverse beaches, and watch stunning sunsets.

Best Time to Visit

The ideal months to visit Koh Kradan are from December to March, offering optimal weather for beach activities and snorkelling.

9. Koh Phi Phi Le

This pristine island in Thailand is a favourite for those seeking a peaceful island getaway in Thailand, offering organised boat tours that allow visitors to explore its breathtaking scenery and vibrant underwater life. For a more personal experience, renting a private boat is also an option, providing a unique way to enjoy this Thailand island retreats.

Location

Koh Phi Phi Le is located in the Andaman Sea, a part of the Phi Phi archipelago, accessible via boat from nearby islands and the mainland.

Things to Do

Explore striking cliff formations, relax on pristine beaches, and snorkel in clear waters teeming with colourful marine life.

Best Time to Visit

The best time to visit Koh Phi Phi Le is from November to April, when the weather is ideal for both sea explorations and beach relaxation.

10. Koh Khai

Travellers can embark on a traditional journey using wooden rice barges, offering an authentic Thai maritime experience, or snorkel to explore the rich biodiversity of marine life, making it a standout among Thailand beach islands.

Location

Located in the serene Phang Nga Bay, Koh Khai is accessible yet secluded, perfect for a peaceful getaway.

Things to Do

Enjoy traditional sailing on rice barges, snorkel in vibrant waters, and experience the unspoiled beauty of one of Thailand’s protected islands.

Best Time to Visit

The best time to visit Koh Khai is from December to March, providing ideal weather for snorkelling and boating, making the most of this unique island experience.

11. Koh Lipe

For those seeking nightlife, Pattaya Beach offers lively bars and beach parties, making it a hotspot for entertainment. Koh Lipe is also an ideal destination for those searching for hidden islands in Thailand with comfortable places to stay in Thailand islands.

Location

Koh Lipe is located in the southern part of Thailand, in Satun Province.

Things to Do

Watch breathtaking sunsets at Sunset Beach, enjoy vibrant nightlife at Pattaya Beach, and relax on serene, untouched beaches.

Best Time to Visit

The best time to visit Koh Lipe is from November to March, when the weather is ideal for both daytime explorations and nighttime festivities.

12. Koh Tarutao

Today, it’s managed by the Thai government to maintain its untouched landscapes and rich history. The island offers a variety of accommodations from rustic camping sites to more comfortable bungalow resorts, making it a versatile choice among Thailand island retreats. Outdoor enthusiasts can enjoy mountain biking, hiking to Lu Du waterfall, or kayaking through the dense mangrove forests, making it a perfect island getaway in Thailand.

Location

Koh Tarutao is situated in the serene Satun Province, part of Thailand’s southwestern maritime border.

Things to Do

Explore historical sites on Thai islands, hike through lush forests, mountain bike on jungle trails, or kayak in expansive mangroves.

Best Time to Visit

The optimal time to visit Koh Tarutao is from December to April, when the weather is most favourable for outdoor activities and exploring the island’s natural and historical attractions.

13. Koh Adang 

The island’s untouched beauty provides a perfect backdrop for relaxation and soulful rejuvenation. Wildlife enthusiasts will appreciate the opportunity to observe indigenous marine animals in their natural settings, and the hiking trails through lush forests showcase some of Thailand’s most splendid views.

Location

Koh Adang is located in Ko Tarutao, Thailand, close to the more famous Koh Lipe but with its own unique and serene environment.

Things to Do

Hike to stunning viewpoints, explore diverse wildlife at the national marine park, and unwind amidst pristine natural beauty.

Best Time to Visit

The best time to visit Koh Adang is from November to April, when the weather is ideal for hiking and wildlife viewing, making the most of this beautiful Thailand beach islands.

14. Koh Phangan

This island appeals to adventure seekers with over 20 diving sites and is globally renowned for its vibrant Full Moon, Black Moon, and other moon-themed beach parties that attract tourists from around the world. Despite its popularity, Koh Phangan retains much of its natural charm as one of the hidden islands in Thailand, offering a less commercialized getaway with rustic road conditions.

Location

Located near Koh Samui in the Gulf of Thailand, Koh Phangan is easily accessible yet retains a feeling of secluded beauty.

Things to Do

Explore exceptional diving sites, participate in famous moon parties, and discover serene hikes through tropical jungles.

Best Time to Visit

The optimal time to visit Koh Phangan is from December to March, when the weather is ideal for beach activities and diving, making the most of this Thailand beach islands.

15. Koh Samet

Despite being one of the hidden islands in Thailand, its popularity means it’s frequently bustling with tourists, attracted by both its stunning natural beauty and the historical sites on Thai islands. Accommodation spans all budgets, but booking ahead is crucial, especially during the peak season from October to May.

Location

Located in the Gulf of Thailand, Koh Samet is a short journey from the mainland.

Things to Do

Soak in the sun on beautiful beaches, engage in various water sports, and revel in the island’s famous nightlife.

Best Time to Visit

The ideal period to visit Koh Samet is from October to May when the weather is most accommodating for outdoor and beach activities.

16. Koh Chang

Activities like elephant trekking, scuba diving, and jungle treks allow visitors to engage deeply with the Thai island local culture and the island’s natural splendour, making it a standout among tropical islands in Thailand.

Location

Situated on the east coast of Thailand within the Mu Koh Chang Marine National Park.

Things to Do

Experience elephant trekking, explore underwater life through scuba diving, and trek through lush jungles to majestic mountains.

Best Time to Visit

The best time to visit Koh Chang is from November to March, offering optimal weather conditions for enjoying both the natural environment and the cultural experiences the island provides.

17. Koh Wai

The island’s natural environment, with its dazzling blue skies, lush green forests, and striking limestone formations, offers a serene getaway. This quiet retreat is perfect for visitors seeking peace and a deep connection with nature.

Location

Koh Wai is located near Koh Yao Nai, easily accessible by boat, providing a secluded slice of paradise.

Things to Do

Explore untouched beaches, take in the breathtaking natural scenery, and enjoy the calmness of this lesser-known destination.

Best Time to Visit

The ideal time to visit Koh Wai is from December to March, when the weather is most favourable for enjoying the island’s natural beauty and serene beaches.

18. Koh Racha

The beaches here are powdery and pristine, providing a perfect setting for both adventure and relaxation. Although uninhabited, the island offers some of the cleanest, most untouched shorelines, ideal for soulful beach strolls. Diving into its waters reveals a captivating underwater world, making it a must-visit for ocean lovers.

Location

Situated near Phuket, Koh Racha offers easy access while feeling worlds away from the hustle.

Things to Do

Engage in exhilarating water sports like diving and snorkelling, relax on immaculate beaches, and explore the stunning marine environment.

Best Time to Visit

The optimal time to visit Koh Racha is from December to March, when the weather conditions are best for watersports and beach activities.

19. Koh Lanta Yai

The island is celebrated as one of the best islands in Thailand for its rich mix of peaceful shorelines, lush rolling hills, and dense woodlands. Adventure seekers can enjoy trekking through its varied landscapes, while the beaches offer a serene retreat. The local culture adds to the charm, making it ideal for those seeking an authentic Thai island experience.

Location

Koh Lanta Yai is located 70 kilometres from Krabi, in the serene waters of the Andaman Sea.

Things to Do

Explore scenic treks, relax on quiet beaches, and immerse yourself in the local culture with guides for islands in Thailand who can enhance your understanding of the island’s heritage.

Best Time to Visit

The best time to visit Koh Lanta Yai is from January to April, when the weather is most favourable for outdoor activities and beach relaxation.

20. Koh Tapu (James Bond Island)

At the local souvenir shops, tourists can find unique keepsakes such as corals and shells. Visitors are advised to bring cameras to capture the mesmerising landscape of this geological wonder, making it a popular stop for guides for islands in Thailand.

Location

Situated in Phang Nga Bay, Koh Tapu is accessible by boat, offering a picturesque journey from the mainland.

Things to Do

Visit this famous cinematic location, explore its unique geological features, and shop for local souvenirs.

Best Time to Visit

The optimal time to visit James Bond Island is from mid-November to April, when the weather provides perfect conditions for photography and exploring the area.

21. Koh Khram Yai

The powdery white sands and lush greenery make Koh Khram Yai a perfect example of Thailand’s natural beauty. Visitors are treated to a rare, unspoiled environment, making it a must-visit for those looking to experience the serene side of Thailand beach islands.

Location

Koh Khram Yai is situated near Pattaya, accessible by boat under special permissions due to its protected status.

Things to Do

Experience the untouched natural beauty, relax on pristine beaches, and observe endangered sea turtles in their natural habitat.

Best Time to Visit

The best time to visit Koh Khram Yai is from November to April when the island is accessible and the weather is most favourable for outdoor activities. This makes it an ideal destination for those seeking family-friendly islands in Thailand.

22. Koh Tao

Koh Tao’s landscape is marked by white sandy beaches contrasting beautifully with the clear blue sea, rolling hills, and lush jungles, ideal for hiking. Whether you prefer the simplicity of beach bungalows or the luxury of Island resorts of Thailand, Koh Tao offers a range of accommodations and activities, including chic restaurants and lively bars, epitomising the allure of tropical islands in Thailand.

For those looking to explore the culinary scene, the island also boasts some of the best restaurants in Thailand, offering an array of local and international dishes.

Location

Koh Tao is situated in the Gulf of Thailand, known for its clear waters and rich marine biodiversity.

Things to Do

Engage in world-class scuba diving, hike through scenic trails, relax on picturesque beaches, and enjoy the vibrant Thailand nightlife.

Best Time to Visit

The optimal time to visit Koh Tao is from November to April, when the weather is most suitable for diving and other outdoor activities, making it a perfect time to explore this island resorts in Thailand.

23. Koh Munnork

Visitors can relax under the sun or stay at one of the Island  resorts in Thailand, making it an ideal location for those searching for places to stay in Thailand islands.

Location

Located near Bangkok, Koh Munnork is accessible by a private boat, ensuring privacy and exclusivity.

Things to Do

Enjoy the secluded beaches, stay in luxury resorts, and explore the calm natural surroundings.

Best Time to Visit

The best time to visit Koh Munnork is from November to February, when the weather is most favourable for beach activities and relaxing in this serene hidden island in Thailand.

24. Koh Mak

Koh Mak is an excellent choice for those seeking places to stay in Thailand islands where calmness and natural beauty are prioritised.

Location

Koh Mak is located in the Ko Mak region, known for its serene environment and beautiful, untouched landscapes.

Things to Do

Relax on secluded beaches, enjoy the local culture, and rejuvenate in a peaceful setting.

Best Time to Visit

The best time to visit Koh Mak is from November to March when the weather is ideal for enjoying the natural beauty and relaxing outdoors. This period is perfect for experiencing the island’s quiet charm without the interruption of heavy rains.

25. Koh Bulon Leh

It’s perfect for visitors interested in scuba diving islands in Thailand, offering clear, calm waters ideal for underwater exploration. The lack of development ensures a peaceful atmosphere, allowing guests to relax in a hammock, soak up the serene environment, or stay at cosy places to stay in Thailand islands. The island also offers photogenic landscapes, ideal for capturing memorable moments.

Location

Situated near Pak Bara, Koh Bulon Leh is accessible via a short boat journey from the mainland.

Things to Do

Unwind in a seaside hammock, dive into the vibrant marine life, and explore the natural beauty without the interruption of large tourist crowds.

Best Time to Visit

The ideal time to visit Koh Bulon Leh is from November to May, during the dry season, making it perfect for outdoor activities and relaxation on one of the most peaceful island resorts in Thailand.

26. Koh Ngai

Accommodations include several comfortable island resorts in Thailand, providing a cosy place to stay amidst the natural beauty. With no roads, exploration is on foot or by kayak, ideal for visiting the enchanting Emerald Cave. It’s also a great spot for scuba diving in Thailand, offering underwater adventures that highlight the vibrant marine life around the island.

Location

Located in Trang Province, Koh Ngai is accessible by boat, offering a secluded getaway.

Things to Do

Relax on untouched beaches, kayak to hidden caves, and dive into the rich marine ecosystem. Engage with guides for islands in Thailand to discover both the natural and Thai islands local culture .

Best Time to Visit

The best time to visit Koh Ngai is from November to April, making the most of the dry season for outdoor activities and water sports in one of the top scuba diving islands in Thailand.

27. Koh Libong: A Cultural and Natural Haven

The island’s Muslim fishing community is known for its warm hospitality, offering visitors a chance to immerse themselves in traditional lifestyles. Koh Libong is not just a place to relax but also a place to learn and connect with a different way of life.

Location

Located in the Province of Trang in Southern Thailand, Koh Libong offers a secluded retreat from the typical tourist path.

Things to Do

Explore the island’s diverse landscapes, from beachfronts to mountain peaks, visit the rich mangrove forests, and engage with the local community to learn about their cultural practices.

Best Time to Visit

The best time to visit Koh Libong is from November to April when the weather is favourable for outdoor activities and cultural exploration, allowing visitors to fully enjoy this unique island resorts in Thailand.

28. Koh Sirey

The island also boasts humble restaurants serving local delicacies and a recreation park where playful monkeys entertain guests. Koh Sirey is ideal for those seeking a quiet retreat within reach of island resorts in Thailand.

Location

Koh Sirey is conveniently located near Phuket, making it easily accessible yet distinctly peaceful.

Things to Do

Relax on quiet beaches, tour local rubber plantations, drive along the picturesque coastal road, and enjoy watching monkeys at the island’s recreation park.

Best Time to Visit

The optimal time to visit Koh Sirey is from December to March when the weather is most suitable for exploring the outdoors and enjoying the island’s attractions.

29. Koh Ra

Families will find the picturesque setting ideal for beach picnics, and the stunning vistas make every photo memorable. Koh Ra offers a peaceful retreat within easy reach of comfortable island resorts in Thailand.

Location

Koh Ra is located near Khao Lak, offering a secluded yet accessible beach experience.

Things to Do

Enjoy romantic walks, explore marine life through snorkelling, and relax with family picnics on the beach.

Best Time to Visit

The optimal time to visit Koh Ra is from November to April, when the weather is ideal for beach activities and exploring the island’s natural attractions.