THE ADVENTURE COLLECTIVE® · Independent discovery and booking for outdoor travel
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.
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.
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.
Verified experiences and guided adventures in the surrounding area.
Operated by Oh-Hoo · Koh Samui, Surat Thani
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.
Both islands are low, rocky outcrops south of Koh Samui—Koh Tan is known for its fringing coral and clear snorkel conditions, while Koh Madsum (often called Koh Mat Sum) keeps small white-sand bays and a tiny fishing village of roughly 30 residents. Geologically these isles are remnants of limestone and sandstone pushed up by ancient currents; their reefs form on the calmer, shallow shelves where sunlight reaches the seafloor.
Culturally the islands are quiet: a handful of homes, a few local boats, and a reliance on fishing and small-scale tourism. On a practical level the trip is a half-day outing—5–6 hours including hotel transfer, two snorkel stops, time to kayak or swim, and a beachfront lunch.
Expect basic facilities: shaded picnic tables, sunbeds, and a local lunch with fresh fruit and soft drinks. Conditions vary—check wind and current forecasts before you book. Bring reef-safe sunscreen, a well-fitting mask, and footwear for rocky shores. Non-swimmers can enjoy calm shallow bays and kayaks, but always wear a life jacket. Timing your trip mid-morning can mean clearer water and quieter beaches. The islands reward low-effort exploration: short swims, bright reef edges, and the slow rhythm of village life under a tropical sun.
easy.
5–6 hours.
Suitable for most fitness levels; you should be comfortable swimming short distances and getting in/out of a boat.
Yes—operators provide life jackets and keep snorkel stops in shallow, sheltered bays so non-swimmers can float or kayak near the shore.
Lunch is provided and typically includes Thai dishes, fruit, and soft drinks; notify operators of allergies when booking so they can accommodate if possible.
The speedboat transfer from Thong Krut/Thong Grood to the islands takes about 15–20 minutes each way, with total tour time around 5–6 hours including transfers.
Facilities are basic—expect simple restrooms or beach-side changing areas; bring biodegradable wipes and a light towel if you need extra comfort.
The islands are traditional fishing outposts south of Koh Samui, with small communities that have long relied on the sea for livelihood.
Coral reefs are sensitive—avoid touching or standing on coral, use reef-safe products, and follow operator guidance to minimize impact.
Oh-Hoo operates guided outdoor trips and adventures with an emphasis on safety, stewardship, and memorable experiences.
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.
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.
Both islands are low, rocky outcrops south of Koh Samui—Koh Tan is known for its fringing coral and clear snorkel conditions, while Koh Madsum (often called Koh Mat Sum) keeps small white-sand bays and a tiny fishing village of roughly 30 residents. Geologically these isles are remnants of limestone and sandstone pushed up by ancient currents; their reefs form on the calmer, shallow shelves where sunlight reaches the seafloor.
Culturally the islands are quiet: a handful of homes, a few local boats, and a reliance on fishing and small-scale tourism. On a practical level the trip is a half-day outing—5–6 hours including hotel transfer, two snorkel stops, time to kayak or swim, and a beachfront lunch.
Expect basic facilities: shaded picnic tables, sunbeds, and a local lunch with fresh fruit and soft drinks. Conditions vary—check wind and current forecasts before you book. Bring reef-safe sunscreen, a well-fitting mask, and footwear for rocky shores. Non-swimmers can enjoy calm shallow bays and kayaks, but always wear a life jacket. Timing your trip mid-morning can mean clearer water and quieter beaches. The islands reward low-effort exploration: short swims, bright reef edges, and the slow rhythm of village life under a tropical sun.