Ao Thian
Ao Thian is a characterful beach on the southern end of Koh Samet, distinguished by its natural rocky outcrops that divide the shoreline into a series of small, sheltered coves. This fragmented layout gives the beach an intimate feel that sets it apart from the longer, more open stretches further north on the island. The combination of boulders, calm water, and modest scale makes it a draw for those looking to step away from busier tourist crowds. The atmosphere here leans decidedly laid-back. Visitors can expect a quieter pace, with waterside restaurants and bars dotted along the shore offering food and drinks with direct views of the Gulf of Thailand. The rocky terrain adds visual interest and provides natural spots for sitting and watching the water, though swimmers should take care around the outcrops depending on conditions. Ao Thian is best suited to travellers who prefer a relaxed, unhurried beach experience over organised facilities or water sports. As with most of Koh Samet, the beach is most comfortably visited during the dry season, which runs roughly from November through April, when seas are calmer and rainfall is minimal. Getting there requires reaching Koh Samet by ferry from Ban Phe pier in Rayong, and Ao Thian sits toward the southern end of the island, so visitors should factor in additional time for onward travel by foot or songthaew once on the island.
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Experience hints
Pair your visit. After Ao Thian, round out your day in Koh Samet with contrasting stops nearby.
Also Popular in Koh Samet

Koh Samet
A compact island near Rayong offering white sand beaches, clear waters, and coral reefs within easy reach of Bangkok.

Ko Kloi Floating Market
A lakeside floating market near Rayong with souvenir shops, dining, and fish-feeding activities.

Nuanthip Pier
The main ferry departure point connecting the mainland at Ban Phe to Koh Samet island.

Saikaew Beach Resort
Upscale beachfront resort on Koh Samet with bright rooms, three pools, a spa, and open-air dining.
Ao Thian: Frequently Asked Questions
Is Ao Thian worth visiting?
Ao Thian holds a 4.5★ rating from 70 Google reviews, placing it among the highest-rated beaches in Koh Samet.
When is the best time to visit Ao Thian?
The best months to visit Koh Samet are November – April (driest island near Bangkok), with the most reliable weather. Crowds peak in Weekends & Thai public holidays — going early in the day usually means fewer people. Months to think twice about: Thai long weekends (crowds, not weather).
Where is Ao Thian located?
Ao Thian is at Ao Thian, Mueang Rayong District, Rayong, Thailand, in Koh Samet. Getting around Koh Samet: Green songthaews between the pier and the beaches; Walking — the east-coast beaches connect via a coastal path.
Visitor Information
Best time to visit
November – April (driest island near Bangkok)
Avoid: Thai long weekends (crowds, not weather)
Rainy season
May – October (lighter than elsewhere)
Avg. temperature
25°C – 33°C(77°F – 91°F)
Crowds
Peak: Weekends & Thai public holidays
Getting there
Bus or minivan from Bangkok's Ekkamai terminal to Ban Phe pier in Rayong (~3–3.5 hrs), then a 40-minute ferry or 15-minute speedboat to Na Dan pier. The island is part of a national park — foreigners pay a ฿200 entry fee on arrival.
Getting around
- •Green songthaews between the pier and the beaches
- •Walking — the east-coast beaches connect via a coastal path
- •Motorbike rental (฿300/day; interior roads are partly dirt)
Where to stay near Ao Thian
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Tips for Visiting Beaches
Check Monsoon Windows
Andaman coast beaches (Phuket, Krabi) have rough seas May–October. Gulf beaches (Samui, Hua Hin) are roughest October–December. Plan your beach trip around these windows for calm water and safe swimming.
Go Early for Empty Sand
Even the busiest beaches are nearly deserted before 9 AM. Sunrise walks on Kata, Chaweng, or Railay are magical — and you'll beat the heat for a morning swim.
Use Reef-Safe Sunscreen
Many Thai marine parks ban chemical sunscreens that damage coral. Bring reef-safe (mineral/zinc-based) sunscreen from home — it's harder to find and pricier in Thailand.
Nearby Places

Ao Wai
A secluded south-coast beach on Koh Samet, known for calm waters and a relaxed, crowd-free atmosphere.

Koh Samet Beach
A scenic island escape near Rayong, offering white sand beaches and clear waters within easy reach of Bangkok.

Ao Hin Khok
A scenic rocky beach on Koh Samet with clear waters and a laid-back atmosphere, ideal for swimming and relaxing.

Sai Kaew Beach
A popular white-sand beach on Koh Samet, busy with speedboats and backed by an upscale resort.
Similar Beaches Across Thailand
Patong Beach
Phuket's most famous 3km beach on the Andaman Sea, buzzing with water sports, dining, and nightlife.

Thong Nai Pan
Thong Nai Pan is the pair of horseshoe bays on Koh Phangan's northeast corner that many rate the island's best all-round base — Thong Nai Pan Yai, the larger southern bay with a village feel and family resorts, and Thong Nai Pan Noi, the more polished northern bay where the island's smarte.

Bottle Beach (Haad Khuat)
Bottle Beach (Haad Khuat) on Koh Phangan's north coast is the island's poster child for earned seclusion — a wide crescent of soft sand backed by jungle hills, with no road in.

Freedom Beach
A secluded white-sand beach near Patong with crystal-clear water, far removed from the crowds.
Where to stay near Ao Thian
Find hotels in Koh Samet on the booking sites travellers trust most.
- Compare prices across sites
- Filter for free cancellation
- Secure checkout on the partner site
Compare rates on Booking.com
Largest selection
Compare rates on Agoda
Asia-focused selection
Compare rates on Hotels.com
Member prices
We may earn a commission from bookings made through these links — at no extra cost to you. Learn more.
Visitor Information
Best time to visit
November – April (driest island near Bangkok)
Avoid: Thai long weekends (crowds, not weather)
Rainy season
May – October (lighter than elsewhere)
Avg. temperature
25°C – 33°C(77°F – 91°F)
Crowds
Peak: Weekends & Thai public holidays
Getting there
Bus or minivan from Bangkok's Ekkamai terminal to Ban Phe pier in Rayong (~3–3.5 hrs), then a 40-minute ferry or 15-minute speedboat to Na Dan pier. The island is part of a national park — foreigners pay a ฿200 entry fee on arrival.
Getting around
- •Green songthaews between the pier and the beaches
- •Walking — the east-coast beaches connect via a coastal path
- •Motorbike rental (฿300/day; interior roads are partly dirt)