The Ang Thong National Marine Park is a pristine archipelago of 42 islands in the Gulf of Thailand. It features towering limestone mountains, thick jungle, white-sand beaches, waterfalls and hidden coves and lakes to explore. Both Koh Samui and Koh Phangan are part of this breathtaking archipelago. If you take only one tour while you're on vacation in this area, make it a sightseeing tour around Ang Thong, stops for snorkeling, optional kayaking, and hiking to viewpoints, where you can admire this amazing island chain and a spectacular sunset are included on the Red Dragon cruise.

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Angthong Sunset Cruise

Relax with tranquil sailing aboard the traditiional sailing yacht 'Red Dragon' across turquoise waters to picturesque islands of the Angthong National Marine Park. Snorkel at remote lagoons, kayak along tropical coastlines and finish the day under a spectacular sunset on a semi-private full-day cruise from Koh Samui.

The Ang Thong National Marine Park is a pristine archipelago of 42 islands in the Gulf of Thailand. It features towering limestone mountains, thick jungle, white-sand beaches, waterfalls, hidden coves and lakes.


Ko Thalu

The cruise begins at the southwest of Koh Samui where it will pass the picturesque Five Islands Ko Thalu. These islands are home to a mysterious and rarely seen phenomenon, the harvesting of bird`s nests. The marine park itself has 4 distinct types of forest, all teeming with wildlife. Some of the creatures that live here are langurs (long-tailed monkeys), little herons, hair-nosed otters, pacific reef egrets, white-bellied sea eagles, sea turtles, iguanas, and pythons.


Ko Nai Phut

Ko Nai Phut is the first stop in the Ang Thong Marine Park archipelago and is also one of the most remote and magical spots, exclusive to this tour. Here participants can go on a guided sea kayaking tour along spectacular coastlines with steep limestone cliffs that tower over palm-lined shores, caves, magical tunnels, and secret lagoons. Alternatively, you can hop on a dinghy that accompanies the kayaks.

Ko Wao Yai

Sailing further north the cruise reaches the Ko Wao island group, which offers some of the best vibrant tropical reef sites to explore. It's considered one of the top 20 snorkeling sites in Thailand. The dive master selects the optimal site depending on conditions to ensure participants have the best underwater experience possible. 

Once a suitable spot has been found, the dive master will give a short safety briefing and the crew will fit participants with complete snorkeling gear to go on a guided underwater tour to see the vibrant and colorful marine life. Non-swimmers and young children are welcome to get into a netted floating raft, which provides safe observation of the tropical reef from above.

After the activities at Ko Nai Phut and Ko Wao yai, the cruise heads back to the marine park and will passes the spectacular Ko Lao Yu. At this point, participants are offered to enjoy a delicious buffet lunch while cruising around Ang Thong's most interesting limestone islands which rise from the sea as towering rock cliffs and dramatic rock formations.


Koh Mae Ko

The next stop is Lok Mae Ko, this island has a stunning beach and an inland saltwater lagoon called Emerald Lake (Thale Nai). You can climb several pathways and wooden staircases to the to observation decks, where you get a full view of this sea-green body of water. 

The main observation deck of the island offers a magnificent view of the emerald lake and the northern part of the Angthong Marine Park. 


You'll also have the opportunity to go down to the lake and feel how beautiful and mysterious this place is. Koh Mae Ko is widely considered the highlight of the Ang Thong Marine Park. This semi-private cruise is the last boat to visit, which avoids overcrowding with other organized tours.


Ko Wua Talap

Sailing back to Koh Samui the cruise passes Ko Wua talap, the Marine Park headquarters and Ko Phaluai one of the few inhabited islands in the Ang Thong Marine Park that is home to a small community of "sea gypsy" fishermen, which are the original people that settled in the Samui archipelago.

Before arrival at Koh samui, you'll catch a perfect sunset, not only does the sky turn into an incredible rainbow of reds and yellows as the evening arrives, but the reflection on the water means you'll get the illusion of floating on perfect pink and purple waves, an experience that will remain with you for a lifetime. 



Relax with tranquil sailing aboard a traditiional sailing yacht equipped with a sun deck, internal saloon and a hot tub across turquoise waters to the picturesque islands of Angthong National Marine Park. Snorkel at remote lagoons and colorful reefs, kayak along spectacular tropical coastlines and finish the day under a mesmerizing sunset on a full-day cruise from Koh Samui.


  • Avoid the crowds with personalized service on this small-group tour
  • Visit Emerald Lake and snorkel with a PADI-certified guide
  • Enjoy a light breakfast, fresh fruit, and buffet lunch
  • Round-trip hotel and dinghy transport included from Koh Samui
What's included:
  • Hotel transfers, pick up by air-conditioned vehicle
  • Departure by spacious yacht
  • Life jacket
  • Tour Guide
  • Full Itinerary
  • Light Breakfast
  • Use of snorkeling equipment
  • Optional sea kayaking - 250 THB per person
  • Soft drinks
  • On boat Buffet Lunch
  • WiFi on board
  • Restroom on board
  • Hot Tub Jaquzzi
  • Towels
  • Private transportation
  • Use of netted raft
  • Hotel transfers, return by air-conditioned vehicle
What's not included:
  • Marine park admission fee 200 THB for adults and 100 THB for children
  • Alchoholic Beverages
Additional Information
  • Confirmation will be received at time of booking, unless booked within 9 hours of travel. In this case confirmation will be received as soon as possible, subject to availability
  • Semi-private tours provide personal service with a maximum of 14 guests on the Blue Dragon (68 ft) yacht and 28 guests aboard the Red Dragon (78 ft) yacht
  • The choice of boat depends on total number of guests.
  • All guests are required to remove footwear when boarding the yacht.
  • The itinerary may change depending on climatic conditions.
  • Not wheelchair accessible
  • Stroller accessible
  • No heart problems or other serious medical conditions
  • Most travelers can participate
  • This tour/activity will have a maximum of 28 travelers

Departure & Return

You will be provided with an exact pick-up time confirmation once your reservation is received. If you’re staying at private accommodation, please provide a contact number for the property you are staying at as soon as possible. Alternatively, allow the tour operator to speak to one of the staff members who work at the property. Please note that an address is insufficient to locate a property on Koh Samui.

Departure Time:

08:30 AM

Arrival in Samui:

An air-conditioned vehicle will collect you at the Pier and drop you back to the hotel or accommodation you were collected from. All other participants of the tour will be dropped off along the way until the entire tour group has completely reached their accommodations.


Price and booking provided by Viator

Cancellation Policy

You can cancel up to 24 hours in advance of the experience for a full refund.

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from $118.70

Join the Angthong Marine Park Semi-Private Sunset Cruise! This full-day tour is one of the most beautiful and popular sea destinations in the region.

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Contact Us

SV.Discovery Tours
SV.Discovery Tours

Useful Links

Thailand e-visa
Royal Thai Embassy UK
Embassies in Bangkok