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
738 reviews
Total reviews and rating from Viator & Tripadvisor
sascencio,,Jan 25, 2026
- Review from Tripadvisor
This tour was exceptional in every way! I went with my two adult children and it was spectacular. From the minute you arrive Cara and her staff take amazing care of all the guests. The marine park is exquisite. It's hard to describe the stunning beauty of the islands, the water, the greenery, the wildlife. Our tour leader spotted a whale from a crazy distance and we got to see a mama Bryde's whale teaching her baby how to eat. We were very close but kept a respectful distance. There are so many little beaches on the islands and the boat pulls up to one, with no one on it, gives you beach mats and let's you swim, relax and take it all in from the warm crystal waters, to the soft white sand and the views that are out of a movie. We were delighted at every turn and this company is rated so highly for a reason. We took other tours in Phuket and none of them compared to the quality, service and attention to detail. Without a doubt, our favorite day of the entire trip!
Shelly S,,Jan 23, 2026
- Review from Viator
We had an incredible day on the water on this small group tour. The hosts were very organized and the equipment was top notch! The team was very attentive to our needs. The lunch was terrific! The small group of 12 really allowed us to relax and enjoy our day. We had a bonus of seeing a whale and monkeys! Honestly one of the best things we did in Thailand!!
PennypupChichester,,Jan 23, 2026
- Review from Tripadvisor
Just wanted to thank 100 degrees east for a fantastic day yesterday. Very impressed with the slick organisation. The team are courteous and capable, prioritising safety with great communication and attention to detail. We were measured up for fins, masks and snorkels, with face masks even available for those of us who were short-sighted. Drinks and fruit offered regularly and lunch set up on the beach which was really delicious. They are very respectful and knowledgeable of the marine life you will encounter on your snorkel. Thank you Jason for the information about the species we saw yesterday, so interesting. This trip might be a little more expensive than some of the others, but you get what you pay for. One of the boats we saw from another company looked decidedly ropey. We were looked after like kings and queens. I can wholeheartedly recommend them.



M6265VWangelav,,Jan 22, 2026
- Review from Tripadvisor
What a fantastic day! There were 6 staff & 12 customers plus a small child on our trip and we were looked after really well from start to finish. We all had a wonderful and memorable day and would highly recommend 100 degrees east.
we love the canaries,,Jan 21, 2026
- Review from Tripadvisor
As two over 65s we looked around for a while to find a trip to Ang Thong National Marine Park that would meet our needs and after looking at many leaflets I decided to look for reviews on trip adviser and Bingo, 100 degrees East sounded like they offered the tour for us….maximum 12 adults ….. choice to join in or abstain from an activity, so I dropped her an email checking our ages we’re not an issue and double checked that we wouldn’t have to participate in everything….bad knees and bad ears meant we wouldn’t both not be able to participate in all the same activities. Cara quickly responded to confirm all was good and we booked the next available trip 😊 On the day of the tour we were picked up from our hotel by an immaculate minibus. Arriving at the office, as soon as you walked in it was clean, classy and oozed 5 star. We were greeted as we walked in and offered a drink while we waited for the rest of our group. Once we were all there we moved into a lovely area at the rear we were all fitted with our fins, given our water bottles, completed the paper admin and listen to the safety brief from Cara…..then we took a short walk to the boat. I want to thank all the crew who made our day one to remember for the right reasons. Some of the crew we engaged with more but without them all this would not have been as perfect. So a huge thank you to Captain Nan, engineer/captain Ked, Guide Samui, Mr Clay, Mr Pi Pi. After boarding the boat (12 adults) we were given a short briefing… and off we went. It took about an hour to get to our first stop which was the snorkling. During our trip our water bottles were kept in ice and there was plenty of other drinks….no limits, everyone just asked if they wanted something. The snorkling was great….you had the option to wear a life jacket or not (most wore them) and we were split into two groups each with a guide who had a safety ring in case anyone needed a tow or needed to rest. I have snorkled many times in other countries but still saw many marine creatures for the first time and my guide was kind enough to dive down and take some photos for me. Three of our group were feeling a little sweaty at this point but they were taken care of by the crew and by the time we got to the secluded beach for lunch and relaxation they were feeling well enough to eat the lovely food that had been prepared for us. Again the crew looked after us like VIPs. Nothing was too much trouble! At this stop you had the option to close mb to the view point….this is one we sat out and just relaxed on the beach and in the water. As we were travelling to our next stop we were lucky enough to see a whale! Throughout the journey we were offered immaculately prepared fruit and drinks. We had a great time kayaking, not sure my hubby in the back of our canoe was actually doing anything but we got back to shore safe and sound. Again we were led by the guides and they took lots of photos for us! We also went to visit an island where you can see the monkeys….and just like the whale 5/6 of them were happy to look at us as we looked at them eating in the trees. Our journey out to the Marine Park was on calm waters and returning home the sea was rougher and we had an exhilarating journey home. On arriving back in Koh Samui we were dropped off from the boat at the beach in front of the hotel..,, what a lovely end to the day. What a day! We would definitely recommend 100 Degrees East and this tour…..thank you .
K528EVdavidd,,Jan 21, 2026
- Review from Tripadvisor
This was probably one of the best run tours I have ever taken on a vacation. Everyone was incredibly knowledgable, friendly and genuinely seemed to be enjoying themselves with us 'tourists'. Organized, great equipment, beautiful locations and a beautiful lunch in paradise. I have been in Koh Samui now for about a week and have done a few other tours. This is THE tour I will be telling people to take when I am back in Canada should they be heading this way. Thanks again everyone who looked after us. Your effort to make our day enjoyable did not go unnoticed and is very much appreciated, including the German humour!

yasemin b,,Jan 20, 2026
- Review from Viator
If you would like to visit the national park and do all the activities this is the tour to do it. My family and I with our 7 years old son had such a great time creating beautiful memories. It was a small group with great people , the team at 100 degrees are amazing , all of them from Cara who organized everything , to the captain , to all the members, they were amazing. Nothing to complain about , the food was amazing , the tour is was very well organized , snorkeling was beautiful , kayaing is super fun and the views from the hike is just amazing . The team takes very nice photos and videos , they are there to help you all day with everything with their wonderfull smiles . only thing to be carefull about is the ride back home is bumpy due to winds and waves but the captain and the crew was amazing . But if you are afraid of this I recommend you contact the team about this. My son had fun he commented like riding a rollercoster it takes an hour. Thank you so much for this wonderful adventure and experience.
RobynZ965,,Jan 20, 2026
- Review from Tripadvisor
From initial communication to many finer details on the day, the trip is definitely worth the money. The locations we were taken to for snorkelling, swimming, kayaking, lunching, hiking, and chilling were absolutely beautiful. Our snorkelling guide was wonderful, making sure we saw as much as possible. My favourite was the blue spotted stingray. I couldn’t do the stairs to the panoramic viewpoint on one of the islands because of my vertigo but, with support, I made it up the stairs/ladders to view the Emerald Lagoon. We also got up close to monkeys at our last stop. It was a very beautiful day.






















660pauli,,Jan 20, 2026
- Review from Tripadvisor
Wow, what an amazing day at Anthong with 100 Degrees East! The day was meticulously planned and full of unforgettable experiences. The whole crew were fantastic. Jason was a brilliant lead, highly professional and capable. We absolutely loved our snorkelling guide, Tom, who was knowledgable, funny and an all round great guy! What a day - can’t fault it! We can’t wait to come back again in a couple of years with our kids.
Stuart K,,Jan 20, 2026
- Review from Viator
A truly VIP adventurous experience with 100 Degrees East. Everything was expertly organized while still feeling exciting and relaxed. The snorkelling was incredible, the kayaking added a great sense of adventure, and there was plenty of time to enjoy both without feeling rushed. The lunch was high quality and a great touch that elevated the day. The team were attentive, professional, and made the whole experience feel seamless. If you’re after an adventurous ocean experience with a VIP touch, 100 Degrees East is an excellent choice.
Operated by 100 Degrees East Dive Team