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
839 reviews
Total reviews and rating from Viator & Tripadvisor
Susan A,May 12, 2026
- Review from Viator
A very well organized trip to Ang Thong marine park. The guides were many and very attentive and fun. The snorkeling was worth it. We did not have the best weather for the remainder of the trip so we had to make the most of it. But that was not of course, the fault of the company. The return boat journey was like a roller coaster ride but we were a strong group! I would like to see discouragement of the use of regular sun block for the snorkeling. This should be in the initial talk before we head down to the boat. Thanks to the driver of our boat! And the head guide on May 11th.
Z8130ABmelindak,May 11, 2026
- Review from Tripadvisor
We had a great day out with 100 degrees East. We had the boat to ourselves as a family and friends 13 in total. The crew were fun, very attentive and informative. They accommodated by husband with a leg injury and assisted him to get on and off the boat. Very memorable day for our family stay in Koh Samui. Highly recommend.




Helen D,May 10, 2026
- Review from Viator
You simply have to do this! Do not even look at any other tours. This was exceptional and every thing was so well thought out. I was a bit nervous about the snorkelling as I had never done this before but you go off in small groups according to your experience and have a guide with you the whole time which made me feel so much better and at ease. Everything is supplied- from dedicated water bottles to towels and beach mats. Lunch was really nice too. As we had a bit of time at the end we were taken to an island I can only describe as paradise with wild langurs. This is by far the best tour I have ever done - highly recommended . The staff are incredible and couldn't do enough for us. Don't hesitate get it booked!
Kimberly W,May 6, 2026
- Review from Viator
Phenomenal every step of the way. We expected to have a good experience based on the five star reviews but this exceeded our expectations. You can tell they have carefully thought out every detail to make the day go as smoothly as possible and maximize their guests’ comfort. The team was super friendly and were excellent hosts. Definitely made you feel like VIPs! Highly recommend!!!! I truly have not one negative thing to say about this experience. Also, Jason gave me super helpful advice for where I could find an SD card for my GoPro - thanks Jason!!
RebeccaHelen H,May 4, 2026
- Review from Viator
Most amazing snorkelling, the team were really supportive offering a guide per3-4 people. Our guide ‘ Mr Star’ supported me to get the most out of the experience by pointing out a huge variety of sea life whilst ensuring I felt safe( I’m a bit water phobic) Short kayaking experience ( time suited me as I don’t really enjoy this) staff took some great photos of us though. The beaches we visited were beautiful, the climb to see the green lagoon was not as arduous as we had heard. Very enjoyable cooked lunch under palm trees. I would thoroughly recommend this experience.
Carl B,May 3, 2026
- Review from Tripadvisor
Everything was on point. Comms leading in and during the trip, timing away from other 50+ pax charters, variety of activities, attention to detail and the extra overs you don’t get elsewhere. Thanks for the highlight of our trip Cara, Loon and Team.
38blankap,May 1, 2026
- Review from Tripadvisor
We booked the Angthong National Marine Park tour with 100 Degrees East and were absolutely thrilled! The pickup went perfectly, the team was incredibly friendly and accommodating, and the spots we visited were breathtaking. There were 10 guests on board and a crew of 5, so everyone's needs were met. The timing was almost always perfect, with us arriving at each spot just as the other boats were leaving. This meant we had the islands and beaches mostly to ourselves. We enjoyed plenty of delicious Thai food for lunch, and drinks and fruit were served throughout the day. Overall, a truly fantastic tour, highly recommended and worth every Bath!
Nora E,May 1, 2026
- Review from Tripadvisor
I must honestly say that I had quite a bit of respect for this tour – especially the long day and the many hours in the heat. I wasn't sure I'd get through this well. All the more I can say now: The decision for this tour was absolutely golden. At no point did I feel uncomfortable. As a solo traveler, I felt really seen, welcomed and very well looked after by the entire team. We were a small group of only nine participants, accompanied by four crew members plus the captain – that made a big difference and created a very personal atmosphere. It was my first time snorkeling and I was a bit nervous at first. Since the others in my small group had already had experience, I had the snorkel guide almost to myself, which gave me a lot of security and made the experience very pleasant. To Emerald Lake I had read many reviews in advance, which talked about great heat and crowds. However, due to the good timing we were there in the afternoon, it was surprisingly quiet, almost empty, and part of the way was even in the shade. In general, the planning of the stops was really successful – we mostly avoided the large crowds. Yes, it was a long day – but a very nice one all around. I can heartily recommend this tour.





Melissa H,Apr 30, 2026
- Review from Viator
Seriously the best excursion I’ve ever been on! All the workers care about showing you a good time and they really take good care of you.
532alanak,Apr 28, 2026
- Review from Tripadvisor
Seamless and amazing day. From hotel pick up to water bottles, towels, delicious lunch and several activities. The crew clearly love their job and were super helpful.






Operated by 100 Degrees East Dive Team