Koh Samui Longtail Boat: Routes, Costs & How to Book
Compare Koh Samui longtail boat trips: Pig Island, Koh Tan and Koh Madsum, private vs shared, hidden costs, timing and who should skip it.
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Last updated November 2026: a Koh Samui longtail boat is a narrow, traditional Thai boat, usually chartered for short island and snorkel runs. Most listings head for Koh Tan and Koh Madsum, so the real choice is private charter, shared tour or a DIY ride. This guide compares four trip types, explains the pricing model and flags who should pick a different boat. It sits under our Koh Samui activities pillar.
Featured image: Jaakko H., CC BY-SA 3.0, via Wikimedia Commons.
Quick answer: what a Samui longtail boat is and who it suits
Longtail boats get their name from a long propeller shaft that trails behind the stern. On Samui they make short hops from beaches such as Choeng Mon, Bophut and Lamai. Expect open-air seating, engine noise and some spray rather than a cabin. Charters usually carry one group per boat, so your group sets the pace at snorkel stops and photo breaks.
- Choose a longtail if you want a private, flexible short trip to nearby islets.
- Choose it if your group is small enough to share one boat and split one quote.
- Choose a speedboat or big-boat tour instead if you want shade, a toilet or a long open-sea run.
The four Koh Samui longtail boat trip types compared
Listings fall into four patterns. Pig Island runs add a snorkel stop at Koh Tan and often use morning start slots. Romantic charters pair Koh Tan with Koh Madsum. Full-day charters cover 3 islands in about 8 hours. A bay ride across Samui Bay to Koh Tan can take as little as 2 hours, with 3–5-hour options also listed. Every duration here comes from listing snippets, so confirm it with the operator. Browse the islands reachable from Samui before you pick.
| Trip type | Best for | Typical duration (verify) | Pricing model | Main trade-off |
|---|---|---|---|---|
| Pig Island and Koh Tan half-day | First-timers and snorkelers | Roughly 3–5 hours | Per boat, private | Animal-feeding questions at Pig Island |
| Koh Tan plus Koh Madsum, romantic | Couples | Roughly 3–5 hours | Per boat, private | Pricier per person for small parties |
| Full-day 3-island charter | Groups wanting a long day | About 8 hours | Per boat, 1–8 guests | Long exposure to sun and spray |
| Short bay ride to Koh Tan | Tight schedules | About 2 hours | Per boat or per person | Less time at each stop |
What a longtail boat really costs: per-boat pricing and the extras
Full-day charters in the listings are priced per boat for 1–8 guests, with a separate hotel transfer fee and a fee per extra person. No current baht rates were verified for this guide, so request a written quote from each operator.
Full-day charters are priced per boat for 1–8 guests, and a group splitting that quote also gets about 8 hours on 3 islands.
- Hotel transfer each way: confirm if included.
- Extra-person fee above the base group size: confirm the cap.
- National or marine park fees: confirm who pays.
- Snorkel gear and life jackets: confirm if supplied.
- Lunch, drinks and water: confirm what is on board.
- Tips for the boatman: decide in advance.
Per-boat or per-person: a simple comparison
Multiply a per-person tour price by your group size. Compare that total with the boat quote plus transfer and extras. A boat quote tends to favor larger groups, while solo travelers often do better on a shared tour. Do the sum with the same inclusions on both sides, or the comparison misleads.
Where to depart and how long the transfer is
Departure points differ by operator, so ask for the exact pier or beach and the transfer time in writing. Choeng Mon, Bophut and Lamai are the beaches named for short hops. Staying near Fisherman's Village? Read our Bophut beach guide for the area. More base ideas are in 8 Best Things to Do in Bophut, Koh Samui: Local Guide. Chaweng visitors can scan Chaweng activities. For the south, see Lamai activities. Pick a departure beach with our beach comparison.
A bay ride to Koh Tan can take as little as 2 hours, so ask each operator for the transfer time in writing.
Best time of day and season, and what weather can do to your booking
Morning slots are the most common in listings, and calmer water is typical early in the day. Late-afternoon rides suit a sunset view, and our sunset spot guide helps you choose a beach. Rough seas can cancel a longtail trip. Ask for the refund or reschedule rule before you pay. Check the Thai Meteorological Department forecast for season windows. Pair a backup plan with rainy-day ideas on Samui.
Comfort, safety and who should pick a different boat
Longtails offer little shade and few toilets. Spray reaches the seats, so wrap phones and cameras. Ask whether life jackets are on board and whether sizes fit children. Small children, anyone prone to seasickness and travelers with limited mobility are better on a larger boat. A calmer, self-powered option is kayaking around Samui. For long open-sea days, compare full-day trips from Samui.
Pig Island: is it worth it?
Listings use both Pig Island and Koh Madsum as labels. Confirm with your operator which island you will actually visit, since this guide found no verified source on how the names relate. Treat it as a short, optional stop. Do not feed animals anything an operator or local rule forbids, and keep your distance. If your priority is snorkeling, the Koh Tan stop matters more.
Who should skip a longtail charter
Tight budgets can skip a private boat and join a shared tour or walk the shore. Groups above the boat cap need two boats or a bigger vessel. Travelers wanting a long open-sea day should look at a speedboat or catamaran tour. Free options are listed in free things to do on Samui.
How to book without overpaying
Compare a direct operator quote with a marketplace listing for the same route and inclusions. Ask for the group cap, start time, stops and transfer terms before paying. Request the cancellation rule for bad weather in writing. If a route enters a national park, check fees and rules with the Department of National Parks. Whether you can book on the beach on the day depends on the operator, so confirm availability first.
- Which islands and stops are included?
- What is the group cap, and what does each extra guest cost?
- Are transfers, gear, water and park fees included?
- What happens if weather cancels the trip?
Notes for your Thailand trip
Optional updates when we add or change a town or island guide.
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