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
689 reviews
Total reviews and rating from Viator & Tripadvisor
Jaimini A,,Dec 27, 2025
- Review from Viator
Outstanding!!! We had a great time and felt we were lucky to be able to see so much and experience wonderful activities. The 100 degrees east crew was extremely professional and courteous. They worked so hard all day and ensured our safety at all times! Plenty of food and water were provided as well as information on the sights and locations. Highly recommended!
LaurenK2449,,Dec 26, 2025
- Review from Tripadvisor
The team at 100 Degrees East were incredible and the trip went beyond our expectations. Not only were the team fantastic but the trip was thoughtfully organised and small details like beach mats, towels and reusable bottles made the experience so much nicer. I couldn't recommend this trip more, do it!

Shatakshi M,,Dec 23, 2025
- Review from Viator
Too good, saw some amazing spots, ate delicious food, did kaykaying and snorkeling with a small bunch of people and the most amazing staff, who well above and beyond for the tour, even took pictures from individual mobile phones from picturesque locations. A 10/10 experience, don’t miss this tour if you are in Koh Samui!
ShalomIsrael,,Dec 23, 2025
- Review from Tripadvisor
100 STARS for 100 Degrees! We had 5 staff for our family of 7. At first I thought maybe it was too much, but once we went into the water for snorkeling I understood and was soo thankful! The snorkeling was amazing, and my smaller kids (ages 12, 14, 16) each had a staff member to help and keep them each safe while my older kids and wife & I had our staff for snorkeling. We all stayed together as a group but it was soo nice to know that my kids were each being helped and stayed safe so I could also enjoy snorkeling stress free! We then went to a gorgeous beach about 10 minutes away for a lunch break. This beach had hammocks on the water and everything iconic about an island in Thailand you can imagine. Pictures can't capture the beauty, it was fabuolous. Next was kayaking at a 3rd island spot. The staff were good at "reading the room" and kept it short for us. One of the staff went with my younger kids to help them paddle and keep them safe, again amazing service. The entire time the staff clearly showed they cared about our comfort, that we had a good time, they worked hard the entire time for us. There was a thousand small things they did throughout the day; really amazing, kind, wonderful people. I could go on & on & on about this day but it was 100% the highlight of our Thailand experience! Do it! P.s. I must note I didn't even know that you could have [snorkeling] goggles in a vision prescription. I didn't know it was a thing. When we came into the dive/snorkeling center they saw my glasses, they asked my prescription # and gave me several goggles to try to ensure I could see clearly and also enjoy the amazing sites under the water!!! They literally think of everything! Thank you Cara, our main guide Tai and the entire team!

166jeannec,,Dec 19, 2025
- Review from Tripadvisor
Cannot recommend this tour from 100 Degrees more highly. Amazing, caring staff. Small group of 10 adults and 2 young children. Each group had their own snorkelling instructor pointing out interesting fish, coral, giant clam and loads more. Kayaking is in same island as lunch, and there is plenty of yummy food as well as time to swim and relax. The Emerald Lake is on another island, and the staff were really supportive with the floating pontoon and steep stairs.



Henri197709,,Nov 23, 2025
- Review from Tripadvisor
The ONLY company to use if you aren't interested in crowds and an absolute unique experience. Can't promote them enough.
Jakgoi,,Oct 28, 2025
- Review from Tripadvisor
Ang Thong National Marine Park was a must-see, and we wanted a company that would guarantee good service. We had several recommendations for 100 Degrees East, all of them good, and we decided to go with them. From the beginning, they showed us they are a serious and professional company. The experience was fantastic and has left us with unforgettable memories. The crew members took care of every detail. The groups were small, avoiding crowded areas, food and drinks were included, and transportation was first by van and then by boat to the resort. They aren't the cheapest company, but every baht paid is well spent. Many thanks to the entire team.
aquaticaUW,,Oct 23, 2025
- Review from Tripadvisor
We own a SCUBA diving shop in Puerto Rico, so we had some pretty high standards. The team at 100 degrees did NOT disappoint. The attention to detail and care for your experience came through with every step. Do yourself a favor and look no further.



Escape23814725197,,Oct 11, 2025
- Review from Tripadvisor
We had the most amazing day at the Ang Thong Marine Park. It makes such a big difference to be in a small group and the 100 Degrees Team was amazing through the whole day. Their timing was incredible - they managed to escape most of the other boats at each of the spots and we were able to enjoy all locations at the fullest, never felt rushed and always up for a chat and laugh. We saw heaps of fish while snorkeling (and the snorkeling gear was really good quality), had great fun at the kayaking and enjoyed a yummy lunch and swim at the beach. Cara, the owner has been amazing in her correspondence and welcomed and briefed the group prior departure - we felt looked after from the start of the day! Thanks for a great day! Anna and Gavin
David K,,Oct 8, 2025
- Review from Viator
Amazing trip with an utterly fantastic crew that went over and above to make the experience truly memorable. Would recommend to anyone!!
Operated by 100 Degrees East Dive Team