Angthong Marine Park
Island-hopping, viewpoints, lagoons, and snorkeling from Koh Samui
Ang Thong Marine Park is one of the most popular day trips from Koh Samui, known for its dramatic limestone islands, hidden lagoons, and turquoise waters. The protected marine park consists of 42 islands scattered across the Gulf of Thailand and is best explored by boat.
Most visitors experience Angthong on a full-day tour that includes island hopping, viewpoints, snorkeling, and beach time. It’s a great choice if you want to see a more natural side of the region beyond Samui itself.
3 tours available from Koh Samui
Available Tours
Day trips and tours to Angthong Marine Park from Koh Samui
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Angthong National Marine Park is a protected archipelago of 42 limestone islands located northwest of Koh Samui. The park is known for its steep cliffs, hidden lagoons, white-sand beaches, and rich marine life.
Unlike the developed beaches of Koh Samui, Angthong feels raw and untouched. Towering karst formations rise straight out of the sea, while small beaches and coves appear between the islands. The park is strictly regulated, which helps preserve its natural beauty and limits development.
A visit to Angthong usually includes stops at key islands for sightseeing, hikes to panoramic viewpoints, snorkeling, and time to relax on the beach. It’s considered one of the most scenic boat trips in southern Thailand.
Understanding Angthong Marine Park’s weather is important when planning a smooth trip.
Climate Overview
The area has a tropical climate with warm temperatures year-round, usually between 26–32°C (79–90°F).
Best Time to Visit
January to September generally offers the best sea conditions, with calmer waters and better visibility for snorkeling. These months are ideal for boat trips and viewpoints.
Rainy Season
October and November are the monsoon months. Sea conditions can be rough, and the marine park may temporarily close for safety or conservation reasons.
Even outside peak months, tours often run whenever weather conditions allow, but availability can change quickly depending on wind and waves.
Start early. Tours usually depart in the morning to avoid rougher afternoon seas. Speedboat tours are faster and allow more time on the islands.
What to BringBring reef-safe sunscreen, swimwear, a towel, sun protection, and a waterproof bag. Snacks and drinks are usually included, but always check your tour details.
Fitness LevelSome viewpoints involve short but steep climbs. Comfortable shoes help, especially on hot days.
Marine Park RulesAngthong is a protected area. Follow park guidelines, don’t remove shells or coral, and respect wildlife at all times.