Top Experiences and Travel Essentials in Koh Samui

Discover 35 Water activities in Koh Samui on Trip.com, updated 10 November 2026, with experiences lasting from 1 to 9 hours. Find the perfect adventure for your day!

From € 29.66 per person, with an average total of € 68.88. Choose the option that suits your plan.

With 491 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 11 November 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 perfect for visiting Koh Samui! Choose from 35 available day tours, including seasonal hits 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 User2026-11-09
It was an absolutely fantastic experience on Koh Samui that you definitely shouldn't miss! Since we were there during the rainy season, the route had to be adjusted to the weather, which was handled perfectly. We simply spent a little more time on Pig Island than we did snorkeling. This gave us extra time to explore the beautiful island, in addition to feeding the pigs! We also went swimming... Afterwards, we went snorkeling and saw some cool fish. Because the weather suddenly turned bad, the return trip was quite an adventure! Luckily, nothing serious happened except that we got wet. You could tell the guides were used to the weather 😂 Overall, a truly amazing experience! I would definitely do it again!
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Reviews: Depart from Koh Samui: Private Charter Boat Tour [Snorkeling + Island Hopping]|Longtail Boat (Optional)|Speedboating, etc.
Guest User2026-10-15
Private longtail trip to Koh Mudsum (Pig Island) and Koh Tan with our two boys. Boat and driver were great: kind, careful and on time, and the weather cleared up nicely. Good value for a private boat. One thing to improve: we had no explanation of what was on each island or what to expect, so a short briefing at the start would make it even better. Bring cash for the ฿50 pp entrance fee at Koh Mudsum.
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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: 7-hour diving and snorkeling experience at Tean Island from Khanom [Koh Samui departure] Pink Dolphin Discovery 1-day tour by speedboat
Guest User2025-07-26
The tour guides and their energy made this trip worthwhile. Although unfortunately there were no dolphins sighting, the trip was exhilarating and enjoyable. The guides and staff really made this experience very special, and I commend them for being such a group of people with great personalities. All locations were beautiful, and they truly did their utmost to try and locate the pink dolphins. I will be back, and I will try again with this tour group!
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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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