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Ang Thong National Marine Park

Ang Thong (Mu Ko Ang Thong) is an archipelago of about 42 islands northwest of Samui, protected as a national marine park and famous for jagged karst cliffs, hidden lagoons, beaches, and viewpoints. It is reached only by organised day-trip boat (speedboat or slower big boat) from Samui, typically a full day. Highlights include the emerald inland saltwater lagoon (Thale Nai) on Koh Mae Ko, reached by a steep climb to a viewpoint, kayaking among the cliffs, and snorkelling. The park charges a national-park entrance fee and routinely closes for part of the monsoon season (commonly around November to mid-December) when seas are unsafe — it is not open year-round.

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Tour prices, departure schedules, park entry fees, and exact seasonal closure dates change yearly — verify live / handled by a human.

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General information, not legal advice. Laws and practice change; for a decision that matters, confirm with the authority named in the sources or a licensed professional.

Ang Thong National Marine Park · Thaissistant