When most people think of Thailand’s islands, names like Phuket, Koh Samui, and Phi Phi instantly come to mind. But as overtourism takes its toll on these once-pristine destinations, a new wave of travelers is seeking refuge in lesser-known Thai islands. Whether you’re chasing serenity, authenticity, or simply a break from the crowd, these hidden islands in Thailand in 2025 offer just that—and more.
Below are the 7 best off-the-beaten-path Thai islands that still remain tranquil, affordable, and untouched by mass tourism.
If you’re looking to skip the crowded hotspots and instead explore hidden islands in Thailand, these under-the-radar gems will deliver a truly rewarding experience. From wildlife-rich mangroves to secluded beaches, each destination offers a unique taste of paradise.
1. Koh Yao Noi
Located between Phuket and Krabi, Koh Yao Noi is the perfect antidote to Thailand’s party islands. With its peaceful beaches, local fishing villages, and eco-resorts, it offers a glimpse into traditional Thai life. Ideal for kayaking, yoga retreats, and quiet bike rides through rubber plantations.
Image: View of Ao Kian Beach at sunset on Koh Yao Noi
Why visit in 2025: Still under the radar despite its accessibility. Infrastructure has improved, yet crowds haven’t arrived.
Official Tourism Info – DoFollow link
2. Koh Libong
One of Thailand’s largest yet least visited islands in Trang province, Koh Libong is known for its dugong population, mangroves, and bird-watching. Accommodations are basic but charming, and the sunsets over the Andaman Sea are postcard-perfect.
Image: Wooden boat anchored near the mangrove shore on Koh Libong
Why visit in 2025: Conservation efforts have made this island a peaceful escape for eco-tourists.
Read our guide to Trang Province – Internal link
3. Koh Mak
A small, sustainable island near the Cambodian border, Koh Mak is beloved for its commitment to plastic-free tourism and its slow-paced lifestyle. With only a few dozen family-run resorts, it’s ideal for those looking for barefoot luxury and digital detox.
Image: Quiet beach huts under palm trees on Koh Mak
Why visit in 2025: Community-based tourism thrives here; it’s safe, scenic, and perfect for remote workers.
4. Koh Phayam
Close to the Myanmar border, Koh Phayam is a rustic haven without cars. Think scooter rides, hammock naps, and reggae bars on the beach. Long stretches of sand meet cashew orchards and gentle waves.
Image: Empty beach trail with cashew trees on Koh Phayam
Why visit in 2025: Still untouched by high-rise hotels; power grid improvements have made long-term stays easier.
This is one of those hidden islands in Thailand where time slows down and travelers can fully unplug. If you’re after peace and quiet, Koh Phayam should be high on your 2025 bucket list.
Travelers exploring hidden islands in Thailand often find Koh Phayam to be one of the most memorable thanks to its raw, natural beauty and authentic vibe. It’s a place where simplicity becomes a luxury.
5. Koh Jum
Situated between Krabi and Koh Lanta, Koh Jum is often bypassed by tourists in a rush. That’s exactly why it’s magical. This island balances friendly locals, good Wi-Fi, and authentic beach bungalows.
Image: Fishermen returning at dusk on the shores of Koh Jum
Why visit in 2025: Lush jungle interiors and reliable internet make it a hidden paradise for nature-loving nomads.
6. Koh Sukorn
Another Trang gem, Koh Sukorn is rarely mentioned in guidebooks. The island is known for its rice paddies, buffalo herders, and genuine Thai hospitality. There are no ATMs or nightlife—and that’s the point.
Image: Traditional longtail boat near a rice field on Koh Sukorn
Why visit in 2025: It feels like stepping back in time. Perfect for slow travelers and photographers.
7. Koh Kood (Ko Kut)
While slightly more known than others on this list, Koh Kood remains blissfully calm compared to its neighbors. It boasts waterfalls, untouched jungles, and luxurious eco-resorts without the chaos of Koh Chang.
Image: Klong Chao Waterfall hidden in the jungle of Koh Kood
Why visit in 2025: Great infrastructure + low-density tourism = best of both worlds.
Koh Kood is quickly gaining attention among fans of hidden islands in Thailand, yet it still maintains a slow vibe and uncrowded atmosphere. Act now before it hits the mainstream.
Final Thoughts: Why You Should Visit Thailand’s Hidden Islands in 2025
As travelers become more conscious of overtourism and crave authenticity, these hidden islands in Thailand offer a rare opportunity. Whether you’re seeking solitude, nature, or cultural immersion, 2025 is the ideal time to explore these gems—before the secret gets out.
Visiting hidden islands in Thailand also supports local communities and sustainable tourism practices. These destinations are perfect for mindful travelers who want to leave a lighter footprint and gain deeper insights into Thai culture.
For those who want more than just beaches and cocktails, hidden islands in Thailand provide space to breathe, reflect, and reconnect with nature. In 2025, these places offer not only beauty, but meaning.
Frequently Asked Questions-hidden islands in Thailand
Q: When is the best time to visit Thailand’s hidden islands?
A: Between November and April for the dry season and calm seas.
Q: Do I need a visa to visit Thailand in 2025?
A: Most travelers get a 30-day exemption. Check your country’s current policy here.
Q: Can I work remotely on these islands?
A: Yes, especially on Koh Jum, Koh Mak, and Koh Kood, which have decent Wi-Fi and long-stay options.
Helpful Resources for Planning Your Trip
- Thailand Tourism Authority – Official Planning Portal
- Visa & Entry Requirements for Thailand (Thai Embassy)
- 12Go Asia – Island Ferry Booking Tool
- Booking.com – Koh Jum & Koh Mak Hotels
- VPN for Southeast Asia Travel (NordVPN)