About Ko Ngam Yai
Ko Ngam Yai is a small uninhabited island in the Gulf of Thailand, part of Mu Ko Chumphon National Park off the coast of Pathio District, Chumphon Province. Located about 17 kilometers offshore and paired with nearby Ko Ngam Noi, it is known for clear turquoise water, fringing coral reefs and distinctive rock formations. Accessible only by boat, it is a protected marine park destination popular for snorkeling and diving day trips.
Visitors guide
Visitors reach Ko Ngam Yai by chartered longtail boat or speedboat from piers at Bang Son Bay or Hat Thung Wua Laen. The island is uninhabited with no pier, buildings or overnight stay, featuring a rocky shoreline, small sandy coves, clear shallow water and coral reefs close to shore. Visitors can explore the coastline by boat, swim and snorkel around reef areas, view twin-island scenery with Ko Ngam Noi, and enjoy undeveloped natural surroundings within the national park.
Key highlights
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Twin island pairing with Ko Ngam Noi separated by a narrow channel
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Clear water and fringing coral reefs suitable for snorkeling and scuba diving
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Uninhabited, undeveloped island within Mu Ko Chumphon National Park
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Distinctive rock formations and small sandy coves
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Day-trip boat access from Pathio District piers
History of Ko Ngam Yai
Part of Mu Ko Chumphon National Park, established in 1989 and extended in 1999 to protect 40 islands and coastal marine ecosystems in the Gulf of Thailand
Route
| By air | Fly to Chumphon Airport (CJM), then road transfer approx. 40-50 km to Pathio piers for boat to island |
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| By train | Take State Railway of Thailand southern line to Pathio Railway Station or Chumphon Railway Station, then taxi or songthaew to the pier |