TH · Surat Thani · 9.62°N 99.68°E

mu ko ang thong national park

Day trip from Samui to 40-odd islands and an emerald saltwater lagoon.

Best time
February to September is generally the calmest. Rough seas from about October to December can cancel boats, and the park may close for part of that time.
How long
1 day
Getting there
Fly from KL to Ko Samui via Bangkok, or fly to Surat Thani and take the ferry across. Day tours leave from Samui and Ko Pha Ngan, about 1–1.5 hours by speedboat.
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TH · Surat Thanimu ko ang thong national park9.62°N 99.68°Egowherelah.com
Dear group chat,Day trip from Samui to 40-odd islands and an emerald saltwater lagoon.— gowherelahTo: whoever’s drivingMu Ko Ang Thong National ParkTH, Surat Thani
KLmu ko ang thong national park
≈ 754 km from KL, as the crow flies
Islands in the sea. Mu Ko Ang Thong, an archipelago of 40+ islands, a marine national park in the Gulf of Thailand, southwestern South China Sea, Surat Thani, Thailand.

Photo: Vyacheslav Argenberg · CC BY 4.0

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Photos: Wikimedia Commons, credited on each.

A marine national park of 42 limestone islands in the Gulf of Thailand, west of Ko Samui. Day trips take in kayaking between sheer cliffs, a steep climb to a viewpoint and a green saltwater lagoon in the middle of an island. It's protected, so there's very little built here apart from a ranger station and a few park bungalows.

Things to do

  1. Ko Wua Talap viewpointA steep climb, with ropes in places, to a view over the whole archipelago.Map ↗
  2. Emerald Lake (Thale Nai)A green saltwater lagoon on Ko Mae Ko, reached by stairs up the cliffs.Map ↗
  3. KayakingPaddle along limestone cliffs and into small caves and bays.Map ↗
  4. SnorkellingSome tours stop at shallow reefs, though the water isn't always very clear.Map ↗
  5. Stay overnightPark bungalows and camping on Ko Wua Talap let you stay after the day boats leave.Map ↗

Good to know

  • Wear proper shoes for the viewpoint climb. It's steep, rocky and slippery after rain.
  • Swimming in the lagoon isn't allowed.
  • Some sunscreen ingredients are banned in Thai marine parks, so bring a reef-safe one.

Last checked October 2026. Things change, so check opening times, fees and transport before you go.