Best Beaches in Thailand

The Andaman coast is Thailand's postcard shoreline — turquoise water, towering limestone cliffs, and some of the best snorkelling and diving in Southeast Asia. The season runs November to April, when the sea is calm and visibility reaches 30+ metres.

The Gulf of Thailand's trio of islands — Koh Samui, Koh Phangan, and Koh Tao — are Thailand's other beach paradise, with a crucial advantage: their best weather (January to August) overlaps with the Andaman coast's monsoon, so there's always a sunny option.

Choosing the right island depends on what you want. For luxury and convenience: Koh Samui has an international airport, five-star resorts, and Michelin-worthy dining. For diving: Koh Tao and the Similan Islands are unmatched. For backpacker vibes: Koh Phangan (beyond the Full Moon Party) and Koh Lanta deliver affordable bungalows and a social scene.

For honeymooners: Koh Yao Noi in Phang Nga Bay is a peaceful Muslim fishing island with luxury resorts, no party scene, and jaw-dropping views of the karsts. Koh Lipe in the far south near the Malaysian border has Maldives-quality water with Thai prices — Sunrise Beach is its showpiece, a long east-facing sweep where the shallows glow turquoise until late morning. It's worth the extra travel time.

For families: Koh Lanta's gentle beaches and laid-back pace are ideal. Koh Samui offers the most infrastructure. Koh Chang in eastern Thailand is large, affordable, and still under the radar compared to the southern islands.

Bangkok is not a beach city, but several excellent beaches are within a few hours' drive.

Thailand's two coastlines run on opposite monsoon schedules, which means great beach weather is available year-round — you just need to pick the right coast.

Andaman coast (Phuket, Krabi, Koh Lanta, Similan Islands): November to April is peak season with calm seas and clear skies. May to October brings the southwest monsoon — some resorts on smaller islands close entirely, and boat services are reduced. Phuket and Krabi remain open year-round with lower prices and fewer crowds, though expect afternoon rain.

Gulf coast (Koh Samui, Koh Phangan, Koh Tao): January to August is the best window, with the driest months being February to April. The Gulf monsoon hits hardest in November, with heavy rain and rough seas. December can be wet but often clears by Christmas.

The sweet spot for beach lovers on a budget: visit the Gulf islands in May–July when the Andaman coast is in monsoon mode. You'll get sunshine, warm water, and significantly lower prices on flights and accommodation.

Thailand still has genuinely uncrowded beaches if you know where to look. Koh Kood in eastern Thailand is large, lush, and virtually tourist-free outside of Thai holidays. The beaches are pristine — Bang Bao Beach and Klong Chao, with its swimmable waterfall lagoon a short walk inland, are the standouts — and the jungle interior is untouched.

Koh Mak, Koh Kood's smaller neighbour, is car-free and tranquil. Koh Bulon Leh in the far Andaman south has a single sandy strip with a handful of bungalows — no ATMs, no nightlife, just sea and sky. Koh Yao Noi and Koh Yao Yai in Phang Nga Bay sit within view of Phuket but feel like a different world.

The Trang islands are the Andaman's best-kept secret. Koh Kradan — which topped a global best-beach ranking in 2023 — has a single powder-soft strip facing a snorkellable house reef, with barely a beach bar in sight. It sits within Hat Chao Mai National Park, whose mainland stretch hides deserted beaches and sea caves, and neighbouring Koh Libong is a dugong habitat with barely any tourism infrastructure. These spots require more planning but reward with the Thailand experience that Phuket had 30 years ago.