Directions: Ang Thong Marine Park, one of Thailand's most beautiful archipelagos.
From the first few minutes of sailing, something changes.
The sound of the waves, the salty air, the islands gradually appearing on the horizon…
The excitement is building.
And when the 42 islands of Ang Thong finally reveal themselves, you immediately understand why this place is considered one of the country's most spectacular natural gems.
An unforgettable adventure in the heart of the Thai islands
The Ang Thong National Marine Park offers an almost surreal setting:
- gigantic chalk cliffs
- Turquoise lagoons
- Deserted beaches
- tropical rainforest
- hidden coves
- crystal-clear water
Each island has its own unique atmosphere and landscapes.
Some beaches appear completely isolated from the world, while others reveal spectacular views of the entire archipelago.
And between two snorkelling stops, it's sometimes enough to just look around to feel like you're in a film.
A fascinating encounter with marine life
The waters of the marine park are known for:
- their transparency
- their shallow reefs
- their colourful tropical fish
Snorkelling in Ang Thong often allows for observations of:
- Clownfish
- corals
- shoals of tropical fish
- Starfish
Even travellers who don't usually go snorkelling generally enjoy this experience thanks to the calm waters around some islands.
The famous Emerald Lake: the hidden treasure of Ang Thong Marine Park
One of the most impressive moments of the day remains the discovery of the Emerald Lake, also called Talay Nai.
Located on the island of Mae Koh, this hidden lagoon is surrounded by steep cliffs and accessible after a short climb offering spectacular views.
The emerald green colour of the water contrasts with the surrounding limestone rocks and jungle, creating an absolutely incredible landscape.
It is without a doubt one of the most photographed spots in the Ang Thong National Marine Park.
Kayaking, beaches and island exploration
Depending on the excursions chosen, it is also possible to:
- Kayaking between the cliffs
- explore hidden coves
- enjoying deserted beaches
- walk to the panoramic viewpoints
The archipelago allows as much:
- The relaxation
- exploration
- more sporting activities.
History of Ang Thong National Marine Park
The Ang Thong National Marine Park was officially established in 1980 to protect this exceptional ecosystem made up of 42 tropical islands.
Before this, certain islands served as a refuge for local fishermen and sometimes even for pirates or nomadic fishermen.
Today, the park plays an essential role in:
- Coral reef protection
- Marine wildlife conservation
- the preservation of tropical rainforests
A large part of the islands remains uninhabited in order to protect their natural balance.
Ang Thong is often considered unmissable because...
Because it brings together in a single day:
- spectacular scenery
- snorkeling
- Tropical beaches
- Kayak
- incredible views
- Island hopping
And above all…
a real sense of escape.
Ang Thong National Marine Park isn't just a boat trip.
It is an immersion into one of the most beautiful natural settings in the Gulf of Thailand.
Activities and excursions in Ang Thong
Between speedboat trips, kayaking, snorkelling, panoramic viewpoints and heavenly beaches, Ang Thong is one of the most popular excursions from Koh Samui and Koh Phangan. To easily compare the different tours available according to your travel style, many travellers also use GetYourGuide before their stay.
Useful tips before you go
- Bring sunscreen and sunglasses
- Bring a waterproof bag
- Bring comfortable shoes for the viewpoints
- Avoid unnecessary heavy objects on the boat
- Check the weather conditions before you leave
- Bring a swimsuit and a towel
La meilleure période pour visiter Ang Thong est durant la saison sèche, qui s'étend de novembre à avril.
Best time:
January → September
During this period:
- generally calm
- excellent snorkelling visibility
- More stable weather
The archipelago often remains more accessible in summer than some areas on the Phuket or Krabi side.
How to get to Ang Thong?
Excursions depart mainly from:
- Koh Samui
- Koh Phangan
- Sometimes Koh Tao
Ferries and transfers between islands can be easily compared via 12Go Asia before your trip.
FAQ – Ang Thong National Marine Park
Ang Thong is composed of how many islands?
The marine park comprises 42 tropical islands.
Can you go snorkelling in Ang Thong?
Yes, several excursions include snorkelling stops.
Is Emerald Lake easily accessible?
Yes, via a short climb with stairs.
Can Ang Thong be visited from Koh Samui?
Yes, it's even the main starting point for the excursions.
La meilleure période pour visiter Ang Thong est généralement pendant la saison sèche, de novembre à mars. Durant cette période, le temps est plus frais et moins humide, avec moins de pluie.
From January to September for calmer seas.
Should one choose a kayak or a speedboat?
The speedboat is faster, the kayak allows for a more immersive exploration between the cliffs.
Official information
The Ang Thong National Marine Park is a protected natural area managed by the Thai authorities to preserve coral reefs and marine biodiversity.
👉 Official Thailand Tourism Information:
Tourism Authority of Thailand
