A half-day speedboat tour from Koh Samui to Koh Tan and Koh Madsum that pairs easy snorkeling over fringing reefs with beach time, kayaking, and a local lunch. Ideal if you want clear water, simple facilities, and a quiet island visit.
More ways to explore the area's outdoor wonders
The speedboat cuts a clean arc across the Gulf of Thailand and the water changes from jade to cobalt as Koh Tan and Koh Madsum appear on the horizon. Salt and sun sharpen your senses; fins slap softly against the deck as you prepare to slip into shallow reefs alive with parrotfish and darting damselfish.
Difficulty
easy
Duration
5–6 hours
Fitness Level
Suitable for most fitness levels; you should be comfortable swimming short distances and getting in/out of a boat.
Wildlife
History
The islands are traditional fishing outposts south of Koh Samui, with small communities that have long relied on the sea for livelihood.
Conservation
Coral reefs are sensitive—avoid touching or standing on coral, use reef-safe products, and follow operator guidance to minimize impact.
Reserve your spot on the Koh Madsum and Koh Tan Snorkeling Trip By Speedboat From Koh Samui today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Use reef-safe sunscreen
Apply biodegradable, reef-safe sunscreen before arrival and reapply sparingly to protect coral and fish habitat.
Wear water shoes
Shorelines are rocky; water shoes make landing and shallow swims safer and more comfortable.
Bring a fitted snorkel mask
A well-sealed mask prevents frequent surface breaks and helps you enjoy longer swims over the reef.
Time your trip mid-morning
Departure around 09:00 often finds calmer seas and better visibility than late afternoon runs.
Mask & snorkel
A reliable set lets you spend more time exploring reef life without constant clearing.
Reef-safe sunscreen
Protects skin from strong tropical sun while minimizing impact on corals.
summer
Water shoes
Protects feet from sharp rock and coral when entering or leaving the water.
Dry bag (10L)
Keeps phone, wallet, and a light layer dry on a small speedboat.