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Koh Samui weather & seasons

How the island's seasons actually work, what the rainy season means day to day, sea temperature, tides and storm safety, plus the best time to visit for different goals.

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  1. Best Time to Visit Koh Samui for Different GoalsRead guide
  2. Koh Samui Weather and Climate: How the Island's Seasons WorkKoh Samui sits in the Gulf of Thailand, not the Andaman Sea, so its seasons differ from Phuket. The driest months are roughly February to April, the…Read guide
  3. Sea Temperature around Koh SamuiThe sea around Koh Samui stays warm all year, roughly 28-30°C. The warmest water is usually April to June (around 30°C) and the coolest, if you can…Read guide
  4. Storms, Flooding and Weather Safety on Koh SamuiSerious tropical storms are not common on Koh Samui, but they do happen, almost always during the northeast monsoon (roughly October to early…Read guide
  5. Tides on Koh Samui: Why the Sea Sometimes 'Disappears'The Gulf of Thailand has an unusual tide: on many days there is only one high tide and one low tide, so when the water goes out it can stay out for…Read guide
  6. What 'Rainy Season' Actually Means on Koh SamuiRainy season on Koh Samui does not usually mean rain all day, every day. For most of the wetter months, rain falls as short, heavy tropical showers…Read guide

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