A half‑day speedboat trip from Koh Samui to Koh Tan and Koh Madsum combining guided snorkeling over shallow coral reefs with beach time and a Thai lunch. Ideal for travelers seeking accessible marine life viewing and a relaxed island stop.
A half‑day speedboat trip from Koh Samui to Koh Tan and Koh Madsum combining guided snorkeling over shallow coral reefs with beach time and a Thai lunch. Ideal for travelers seeking accessible marine life viewing and a relaxed island stop.
You step off the speedboat into a shallow world of turquoise that seems to push and pull at your snorkel, the sea daring you to look closer. The surface is a patchwork of sunlight and scattered coral bommies; beneath, schools of parrotfish thread between staghorn and brain coral while the boat idles a short swim from a white sand strip.
Verified experiences and guided adventures in the surrounding area.
Operated by Oh-Hoo · Koh Samui, Surat Thani
You step off the speedboat into a shallow world of turquoise that seems to push and pull at your snorkel, the sea daring you to look closer. The surface is a patchwork of sunlight and scattered coral bommies; beneath, schools of parrotfish thread between staghorn and brain coral while the boat idles a short swim from a white sand strip.
Koh Tan and Koh Madsum sit just south of Koh Samui — islands shaped by limestone, coral growth and centuries of fishing culture. Koh Tan's reefs are protected pockets where giant clams and colorful reef fish congregate; Madsum (Koh Mat Sum) offers calm bays and a rare quiet beach frequented by local picnickers and a small resort. Geologically, these islets are coral outcrops on the Gulf of Thailand’s shallow shelf, which makes them accessible and rich but also vulnerable.
On this six‑hour speedboat run you'll split time between guided snorkeling and beach relaxation, with hotel transfers and a Thai set lunch included. Expect basic safety briefings, life jackets, and equipment — but bring your own mask if you prefer fit and clarity.
Practical tips: start early for glassy seas and cooler sun; wear a UV swim layer and reef‑safe sunscreen; practice neutral buoyancy to avoid coral contact; keep water and a waterproof pouch for your phone. Weather can close trips on short notice during monsoon squalls; tour operators typically require a small minimum group and give refunds if canceled. For straightforward access to some of Samui’s best nearshore reefs, this speedboat trip is an efficient, family‑friendly option that balances easy snorkeling with beach downtime.
No — the tour is rated easy and provides life jackets; however, basic swimming comfort and the ability to float and tread water are recommended.
Yes, standard masks and life jackets are provided, but many travelers bring their own mask for comfort and fit.
Operators typically cancel for safety if seas are rough; their policy offers a full refund or rescheduling if canceled 24+ hours before departure or due to bad weather.
Yes children (usually 4–11) can join with a child ticket, but minors should be supervised and wear life jackets when required.
Oh-Hoo operates guided outdoor trips and adventures with an emphasis on safety, stewardship, and memorable experiences.




You step off the speedboat into a shallow world of turquoise that seems to push and pull at your snorkel, the sea daring you to look closer. The surface is a patchwork of sunlight and scattered coral bommies; beneath, schools of parrotfish thread between staghorn and brain coral while the boat idles a short swim from a white sand strip.
You step off the speedboat into a shallow world of turquoise that seems to push and pull at your snorkel, the sea daring you to look closer. The surface is a patchwork of sunlight and scattered coral bommies; beneath, schools of parrotfish thread between staghorn and brain coral while the boat idles a short swim from a white sand strip.
Koh Tan and Koh Madsum sit just south of Koh Samui — islands shaped by limestone, coral growth and centuries of fishing culture. Koh Tan's reefs are protected pockets where giant clams and colorful reef fish congregate; Madsum (Koh Mat Sum) offers calm bays and a rare quiet beach frequented by local picnickers and a small resort. Geologically, these islets are coral outcrops on the Gulf of Thailand’s shallow shelf, which makes them accessible and rich but also vulnerable.
On this six‑hour speedboat run you'll split time between guided snorkeling and beach relaxation, with hotel transfers and a Thai set lunch included. Expect basic safety briefings, life jackets, and equipment — but bring your own mask if you prefer fit and clarity.
Practical tips: start early for glassy seas and cooler sun; wear a UV swim layer and reef‑safe sunscreen; practice neutral buoyancy to avoid coral contact; keep water and a waterproof pouch for your phone. Weather can close trips on short notice during monsoon squalls; tour operators typically require a small minimum group and give refunds if canceled. For straightforward access to some of Samui’s best nearshore reefs, this speedboat trip is an efficient, family‑friendly option that balances easy snorkeling with beach downtime.