Top picks for Koh Samui Water activities

Discover 35 Water activities in Koh Samui on Trip.com, updated November 8, 2026, with experiences lasting from 1 to 9 hours. Find the perfect adventure for your day!

From €29.73 per person, with an average total of €69.63. Choose the option that suits your plan.

With 490 verified reviews, Water activities Koh Samui boast an average rating of 4.2.

This week's most popular Water activities: "One-day tour to Angthong Marine National Park", with 208 reviews and a 4.5 rating.

Now on Trip.com: "Departing from Koh Samui: Koh Madsum & Tean Island snorkeling experience | dolphin chasing tour upgrade available", a 5-hour adventure in Koh Samui!

The next available day tour departs on November 9, 2026. Book now to secure your spot!

Koh Samui Water activities usually take about 5 hours — perfect for a relaxed, immersive experience!

100% of Koh Samui Water activities now offer English-speaking guides

November is the perfect time to visit Koh Samui! Choose from 35 available day tours, including seasonal favorites like One-day tour to Angthong Marine National Park.

Your trip, worry-free! All day tours are run by licensed suppliers with verified reviews, and many include free cancellation before departure.

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35 results for Koh Samui Water activities

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Reviews/Trip Moments

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Reviews: Departing from Koh Samui: Koh Madsum & Tean Island snorkeling experience | dolphin chasing tour upgrade available
Guest User2026-10-05
The pigs simply stole our hearts. We never would have thought we loved pigs so much. 😁. Definitely a must-see!
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Reviews: Koh Samui Departure: Mu Ko Ang Thong National Park Sightseeing and Snorkeling|Upgradable kayaking adventure
Guest User2026-10-08
Well organised! Incredible views and the staff is so nice! English speaking and helpful taking pictures!
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Reviews: 1-day tour to Mu Ko Ang Thong National Marine Park from Koh Samui [snorkeling/lunch/transfer/kayaking]
Guest User2026-09-08
The route matched the description. The excursion itself was wonderful. I highly recommend it. We were with the Funny Day team. They're great guys, but there was one major drawback I didn't like. On the way back from the archipelago to Koh Samui, we ran out of gas. Oh well, it happens. We first took some gas from a boat traveling alongside, but it wasn't enough. Then we waited for a second boat to bring gas and pick up some of the people. And it seemed like everything should go smoothly from there, but no! The new boat also ran out of gas 100 meters from the beach. And we waited for a third boat. They need to fix this urgently and bring extra gas. Otherwise, the excursion itself, the views, the snorkeling, and the kayaking were amazing. The views from the observation deck are incredibly beautiful, but the climb is very difficult and is best done in sneakers.
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Reviews: Koh Samui: Private Longtail Boat to Pig Island with Snorkel
Guest User2026-07-27
We have nothing negative to report, even though the island is relatively crowded. The children were delighted and had a great time. Departure from Koh Samui, pick-up from Koh Madsum, and the snorkeling trip went perfectly and as agreed. Our "captain" was very friendly, reliable, and punctual. We would definitely book through this company again 👍🏼
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Reviews: Koh Samui Pig Island and Tean Island Snorkeling with Pink Dolphin Half-Day Tour
Guest User2026-07-29
We booked this trip as one of our favourites. We were picked up on time by a friendly driver in an air conditioned mini van. We were driven to the pier and had time for a coffee. The driver was super friendly and professional. We were on a speedboat which was exceptional fun. It took 15 mins to get to tean island where we snorkelled. They provided water, snorkels and the health and safety was also exceptional. Snorkelled for 45 mins and then took a 5 mins spin to pig island ! This was absolutely amazing. The place was full of small, medium and large pigs. They were lovely. You can feed them and let them drink from a bottle. We had a lovely lunch (vegetarian and meat options). There is a bar there also. We had time to swim and chill. It took 15 mins back to the pier where our driver was waiting for us and then returned back to the hotel. One of the very best organised trips I've ever been on.
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Reviews: One-day tour to Angthong Marine National Park
Guest User2026-09-22
Incredible tour!! Mr. Tu is the best. Everything was exactly as described, the guide and accompanying staff were incredibly cool. Water and cola were offered at every stage, and beer was available for an extra fee. I really enjoyed it, I highly recommend it.

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