Top picks for Koh Samui Water activities
Discover 37 Water activities in Koh Samui on Trip.com, updated October 19, 2026, with experiences lasting from 1 to 9 hours. Find the perfect adventure for your day!
From BRL 150.12 per person, with an average total of BRL 291.96. Choose the option that suits your plan.
With 481 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 October 20, 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
October is perfect for visiting Koh Samui! Choose from 37 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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37 results for Koh Samui Water activities
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4.4/5· 94 reviews· 1.6k bookedFree cancellationBook now for tomorrow22 bookings in 7 daysFromBRL 205.56
4.5/5· 32 reviews· 496 bookedFree cancellationBook now for tomorrow60 travelers savedFromBRL 168.49![1-day tour to Mu Ko Ang Thong National Marine Park from Koh Samui [snorkeling/lunch/transfer/kayaking]](https://ak-d.tripcdn.com/images/0351412000qlnax6s3A36_C_568_320.jpg?_fr=wc)
4.6/5· 45 reviews· 913 bookedFree cancellationBook now for tomorrow91.1% of travelers recommendFromBRL 269.58
4.5/5· 208 reviews· 821 bookedFree cancellationBook now for tomorrow239 travelers savedFromBRL 195.61
Trip.Select4.7/5· 26 reviews· 850 bookedFree cancellationBook now for tomorrow152 travelers savedFromBRL 279.00![Depart from Koh Samui: Private Charter Boat Tour [Snorkeling + Island Hopping]|Longtail Boat (Optional)|Speedboating, etc.](https://ak-d.tripcdn.com/images/0353512000hf641s1F60F_C_568_320.jpg?_fr=wc)
4.2/5· 5 reviews· 33 bookedFree cancellationBook now for tomorrowFromBRL 403.82
4.7/5· 21 reviews· 228 bookedFree cancellationInstant confirmationBook now for tomorrow10% offLimited-time saleFromBRL 320.71BRL 356.35
4.6/5· 5 reviews· 61 bookedFree cancellationInstant confirmationBook now for tomorrow10% offLimited-time saleFromBRL 367.11BRL 407.91
4.8/5· 8 reviews· 58 bookedFree cancellationInstant confirmationBook now for tomorrow10% offLimited-time saleFromBRL 298.88BRL 332.09
Free cancellationBook now for tomorrowFromBRL 485.25
3.9/5· 21 reviews· 367 bookedFree cancellationBook now for tomorrowFromBRL 225.93
3.6/5· 5 reviews· 151 bookedFree cancellationInstant confirmationBook now for today9% offLimited-time saleFromBRL 238.15BRL 264.61
31 bookedFree cancellationBook now for tomorrowFromBRL 176.06![7-hour diving and snorkeling experience at Tean Island from Khanom [Koh Samui departure] Pink Dolphin Discovery 1-day tour by speedboat](https://ak-d.tripcdn.com/images//0580z12000n3owl87DB91_C_568_320.jpg?_fr=wc)
5.0/5· 1 review· 35 bookedFree cancellationBook now for tomorrowFromBRL 408.65
4.0/5· 1 reviewFree cancellationBook now for tomorrowFromBRL 235.89
2.0/5· 1 review· 81 bookedFree cancellationBook now for tomorrowFromBRL 219.87
Free cancellationBook now for tomorrowFromBRL 150.12![Thailand Koh Samui Tean Island Diving and Snorkeling Experience 4-8 Hours [Pig Island Speedboating 1-Day Tour/Half-Day Tour + Meal]](https://ak-d.tripcdn.com/images/0356y12000jluy2cx8928_C_568_320.jpg?_fr=wc)
FromBRL 325.25
4.2/5· 6 reviews· 157 bookedFree cancellationBook now for tomorrow55 travelers savedFromBRL 283.06
3.5/5· 2 reviews· 85 bookedFree cancellation65 travelers savedFromBRL 582.26
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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: 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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Reviews: Koh Samui: Koh Tao and Ko Tao + Nang Yuan Island 1-day tour speedboat snorkeling with hotel transfer and lunch included
Guest User2026-09-30
A perfectly organized trip! They picked us up from the hotel, took us to the pier, gave us something to drink, fed us, and then we were off! Everything was explained clearly, even with my limited English. We arrived back on time and were dropped off home. Thanks for the trip!★
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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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