Spend a full day exploring Angthong’s 42 islands by big boat—snorkel vibrant reefs, kayak emerald coves, and climb to viewpoints overlooking the Blue Lagoon. This guided tour from Koh Samui pairs on-board meals with hands-on water activities for a compact, active island experience.
More ways to explore the area's outdoor wonders
A low, salty wind pushes past the rail as the big boat slips away from Koh Samui and the jagged silhouettes of Angthong's 42 islands arise like green teeth on the horizon. Breakfast trays clink while the captain charts a course through limestone cliffs; by mid-morning you’re stepping onto powder sand, grabbing a paddle or a mask, and feeling the sea pull you toward hidden coves.
Difficulty
moderate
Duration
8 hours
Fitness Level
Moderate — you should be comfortable with short hikes of 10–20 minutes, basic paddling, and swimming short distances.
Wildlife
History
Ang Thong was designated a marine park in the late 20th century to protect its reefs, islands, and coastal forests, and it has long been a fishing and small-scale coastal community area for nearby islands.
Conservation
The park is protected and visitors are asked to avoid littering, stay off live coral, and use reef-safe products; operators typically follow rules set by park authorities to reduce impact.
Reserve your spot on the Angthong National Marine Park, Big Boat from Koh Samui today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Beat seasickness early
If you’re prone to motion sickness, take antiemetic medication 30–60 minutes before departure and sit mid-ship for smoother motion.
Protect reefs, use reef-safe sunscreen
Choose mineral-based sunscreen and avoid lotions that wash off; don’t touch or stand on coral when snorkeling.
Bring grippy footwear
Water shoes or sandals with soles help on wet rocks and beach landings where the sand meets coral rubble.
Hydrate and pace activity
Tropical sun and paddling can deplete energy quickly—drink water throughout the day and take breaks during kayak legs.
Reef-safe sunscreen
Protects skin and marine life under tropical sun.
summer
Water shoes
Provide traction on wet rock and beach landings.
Dry bag (10–20L)
Keeps phone, snacks, and a light layer dry during kayaking or splashy landings.
Snorkel set (optional)
Using your own mask often gives a better fit and clearer snorkeling.