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Ang Thong National Marine Park
Best time to visit
Early morning is best to avoid the largest tour-boat crowds and the midday heat, and November to April offers calm seas and the best snorkeling visibility.
Budget tips
A national park entrance fee applies (roughly 300–400 THB for foreign visitors as of 2024), plus boat or tour costs; book a shared group day trip from Koh Samui and bring your own snorkel to reduce rental and transfer expenses.
Recommended for
Snorkelers, Kayakers, Photographers, Day-trippers from Koh Samui
Plan your visit
Full day
About
Quick facts: An archipelago of 42 limestone islands rises from emerald water, with sheer cliffs, tiny white-sand coves and jungle-clad interiors you can kayak straight up to. Snorkeling often reveals schools of neon parrotfish, occasional stingrays and more than 30 species of hard and soft corals tucked into shallow bays.
Highlights: Climb about 200 steps to a cliff-top viewpoint where a bowl-shaped saltwater lake sits ringed by limestone walls, the panorama unfolding into turquoise bays and sunlit islets. Guides sometimes tally over 50 juvenile barracuda near specific headlands at dawn, the fish flashing silver beneath sun-splashed water and surprising snorkelers who expected only calm reefs.
Insider tips
- Wear reef-safe sunscreen and quick-dry clothing, bring a hat and light rain layer for sudden showers.
- Carry cash in small notes for the park fee, boat tips, and small food stalls since card machines are unreliable.
- Climb the Khao Ho viewpoint early for golden light and far fewer people, and skip the main beach at midday when most tour boats arrive.
- Bring a dry bag and water shoes for rocky shorelines, or rent snorkel gear from a trusted tour operator if you prefer not to carry equipment.
Where to Stay in Koh Samui
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