Available languages
8 hours 30 minutes
Mobile ticket
The 100 Degrees East Marine Team's signature tour to the Angthong National Marine Park tour presents an exciting alternative for guests who prefer to avoid the crowds in safely and comfort, seeking a little more exclusivity in their choice of excursion. We guarantee a maximum of only 12 adults on our tour or 14 guests when children aged 4 - 12 years are on board. With a high ratio of crew to guests our English-speaking guides provide a very personalised experience. Our caring and knowledgeable guides accompany you as you snorkel, kayak and make your way to the famous Emerald Lagoon. Your day can be as active as you wish or spent dozing off under the shade of the trees. Everything is included in the price of the tour, no additional fees or charges. For groups larger than 4 please contact us to check our availability.
Not recommended for travelers with spinal injuries
Not recommended for pregnant travelers
Not recommended for travelers with poor cardiovascular health
Travelers should have at least a moderate level of physical fitness
Minimum number of guests required. We will notify you by 4.00 PM a day prior to your tour, if we didn't reach minimum guests required to operate. You will have the option to cancel your reservation or change to the next available tour.
Bookings for groups of 5 or more travellers must be made directly, we can not guarantee that separate bookings made for the same group will be scheduled on the same boat.
For a full refund, cancel at least 24 hours before the scheduled departure time.
Ko Samui
Start the day cruising past the northern coast of Samui en route to the Angthong National Marine Park..
Upon arrival at Koh Wao our team will select the best location for snorkelling to ensure a safe and fun experience. After a briefing the guides will join you in the water to provide assistance and lead the way as you explore. We provide personalized service that makes this suitable for all ages and abilities, from experienced snorkelers to non-swimmers. All snorkel equipment is provided, including fins which make navigating the reef much easier! Lifejackets and life rings are available, our guide can also act as your in-water taxi service!
Life jackets
Soda/Pop
Bottled water
Lunch
Towels
Use of Snorkelling equipment
All Fees and Taxes
Kayaking
Restroom on board
Seasonal fruit
Full insurance coverage
Transfer to and from accommodation
Select a pickup point
Pickup included
719 reviews
Total reviews and rating from Viator & Tripadvisor
Joanne H,,Jan 17, 2026
- Review from Viator
Best day out on Angthong National Marine Park! Well organised, great small group, delicious lunch, and great activities! The guys who ran the tour were kind, helpful and friendly. Highly recommended!
mgfvvcjl,,Jan 17, 2026
- Review from Tripadvisor
To Cara and the team. We absolutely loved the tour which we took on Friday 16th January and cannot recommend this enough. We were looked after so well by the team and have some great photos to remember the day. All the staff worked hard and made us so welcome. Thanks also to Dominic for bringing Tony back safely !!. Thanks Tony & Jules.
Steve H,,Jan 17, 2026
- Review from Tripadvisor
What a great trip Cara, Jason and the team put together. Had a bit of everything, snorkelling, (small groups with guide telling you all about the sea life) views galore, kayaking and a bit of relaxing on the beach with lunch. Finally seeing the monkeys on one of the islands. Only 11 people on the boat and a very worth while experience. We used Tripadvisor reviews to choose 100 degrees east and happy to give another 5 star review. Thank you
anju 10,,Jan 16, 2026
- Review from Tripadvisor
The whole day was amazing . The crew was very professional and helpful throughout the day . They also used a reusable water bottle for each of us which was impressive. We had a great day . I highly recommend this trip


730jamesd,,Jan 16, 2026
- Review from Tripadvisor
Such a great day exploring the Angthong National Marine Park. Everything the reviews say is true about 100 Degrees East. The support team on the boat are friendly, helpful and informative. The equipment is excellent and the day is planned to perfection. My son and I did this tour and cannot think of a single thing to improve. I don’t give praise lightly but these folks have got it right. They may be a bit more pricey but when you compare them to the overloaded boats of their competitors they are just so much better. Well done guys!!
Kaitlyn B,,Jan 15, 2026
- Review from Tripadvisor
Fabulous tour from start to finish. All guides were professional, informative and fun. You could really tell that they were passionate about sharing this experience with us. We felt safe throughout each of the activities as our guides took us through them. I really appreciated that our guides adjusted the itinerary as we went through to ensure we had the best experience. We hardly saw another tour group all day because of this! We were even able to pause our tour briefly to watch a whale feeding! A wonderful day out with life long memories
Keeley M,,Jan 15, 2026
- Review from Tripadvisor
Don’t think twice about booking this! What an amazing day trip. We started the day being pick up via included transfer. We boarded our boat with 10 people total plus a great crew. Snorkling was the first activity. Saw loads of beautiful fish and reefs, then our next stop was lunch on a secluded beach (all included). Then off to kayak around one of the islands. We also saw whales and took a detour to get closer. Last stop was the emerald lagoon. Stunning scenery. Then we had time to visit an island with cute monkeys to spot. Perfect day really. Highly recommend, again the crew were fantastic. Thank you all.

150vanceb,,Jan 15, 2026
- Review from Tripadvisor
Such a great day! The salt water lake was cool. The stairs or ladder-hike or whatever ya wanna call it was an experience all of its own! Fun day on the water! There are many different operators that do this same route. Hard to say if one is better than the other. They all use similar equipment and offer similar things. The setting makes it what it is. The one thing I will say is book a private charter on a speed boat so you can get the most out of the experience! The big boat is a circus from the outside looking in. Also, they took us places you wouldn’t be able to go in the big boat. The remote restaurant for lunch for example. The cave snorkeling wouldn’t be possible on the big boat and that was one of the best parts!







colinrA4109IE,,Jan 13, 2026
- Review from Tripadvisor
Great experience. Lots of fun activities. Everyone was very nice. Good food. Amazing views.
245saschae,,Jan 13, 2026
- Review from Tripadvisor
The 100 Degree Tour to Ang Thong was an all-round perfect experience for us and clearly one of the highlights of our stay. From the first moment you notice that an extremely well-rehearsed, harmonious team is at work here. Everyone knows exactly what to do, everything meshes – professional, warm and incredibly courteous. A very big plus is the flexibility of the crew: Since they are free to decide when and where to invest, the spots were approached at exactly the best times – with as few other visitors as possible. This allowed us to really enjoy the beautiful places in Ang Thong National Park, without the hassle or mass tourism. The timing was just perfect. The spots themselves were breathtakingly beautiful, just as you would hope – turquoise water, spectacular views and absolute postcard motifs. In addition, there was very good food on board: fresh, delicious and more than sufficient. The boats are also excellently equipped, clean, comfortable and simply invite you to feel good. Especially pleasant was the small group size of only twelve people. This almost created a family atmosphere, very relaxed and personal – no comparison to large, confusing tours. You don't feel like a number, you really feel like a guest. The bottom line is that we had a beautiful, perfectly organized day where everything was really right. The price is worth every penny, because here you get quality, passion and genuine passion for what is made. We would book this tour again at any time and can recommend it without restriction. Many thanks to the whole team for this unforgettable experience! 🌴🚤✨
Operated by 100 Degrees East Dive Team