Best beaches in Thailand: 10 local picks by coast (2026).

Thailand has two main beach coasts and they're out of sync by season. The Andaman (Phuket, Krabi, Phi Phi) is best November–April. The Gulf of Thailand (Koh Samui, Koh Phangan, Koh Tao) is best February–September. Plan around this and you'll never have a rained-out beach week.

Crowd patterns matter more than weather for the famous beaches. Maya Bay reopened with strict daily caps; Phi Phi is busy year-round; Krabi quiets down significantly after Songkran in mid-April.

Railay Beach (Krabi) — only reachable by longtail boat, no roads, dramatic limestone cliffs. Stay one night minimum. Kata Noi (Phuket) — the calmest beach on Phuket's west coast, family-friendly, walkable to restaurants.

Phang Nga Bay isn't a beach but it's the iconic Andaman day trip — limestone islands rising out of the water. Booking a small-group speedboat tour beats the cattle-boat operators on price-per-experience.

Koh Tao — the cheapest place in the world to do an Open Water dive certification, and the beaches around Sairee at sunset are some of the best in Asia. Haad Yuan (Koh Phangan) — a quiet bay 10 minutes by water-taxi from Haad Rin, no Full Moon Party noise.

For something genuinely quiet: Koh Kood, near the Cambodian border. Almost no nightlife, perfect sand, only reachable by ferry from Trat.

The lesser-known islands take an extra connection but reward you with empty beaches even in February. Koh Lipe, on the Malaysian border, has Andaman-quality water with Gulf-style relaxed vibes.

• Koh Kood — empty white sand, near-zero nightlife
• Koh Lipe — best snorkeling, requires speedboat from Pak Bara
• Koh Lanta Yai — long quiet beaches, easy with kids
• Avoid Phi Phi in March — peak crowds, peak prices

The four-island day trip from Krabi (Poda, Chicken Island, Tup, Phra Nang) is still the best-value boat day in southern Thailand. Going with a small-group operator is far better than the cheapest dock-side option — guides actually explain the geology and time the lagoon visits around the tide.

For Koh Samui, the standard Ang Thong Marine Park trip is the must-do — 42 limestone islands, the emerald lake, snorkeling stops. Pre-booking saves you the resort markup.

Phuket and Krabi have direct international flights; the Gulf islands you reach via Surat Thani or Koh Samui's own (expensive) airport. For Koh Tao and Koh Phangan, the Lomprayah catamaran from Chumphon is the comfortable option.

Airport transfers in the islands are notoriously overpriced if you don't pre-book — a private pickup arranged before you arrive is usually 30–50% cheaper than the airport taxi counter, especially in Phuket and Krabi.