Sun-kissed days, warm water, and those quick tropical showers that make the island glow.
This is the most popular time to visit Koh Samui, and for good reason! The skies are clear, the humidity is low, and the sunshine is perfect for lounging on the beach or exploring the island.
Daytime temperatures hover around 25–30°C (77–86°F), making it ideal for outdoor activities.
Tip: Book your accommodation early—this is peak season.
Things heat up, with some days reaching ~35°C (95°F). It’s a sun lover’s paradise, with great swimming and snorkeling.
Expect brief afternoon thunderstorms that cool things down.
Tip: Sunscreen, hat, and hydration—midday sun is strong.
Showers are common but often short-lived, leaving plenty of time to enjoy the day. The island turns lush and green.
Typical temps are 26–32°C (79–90°F). Sep–Oct usually see the most rainfall.
Tip: Great for quieter beaches and better hotel deals.
Dry Season (Dec–Feb)
Warm, dry, calm waters and clear skies—perfect beach weather and the most popular period.
Rainy Season (May–Oct)
Weather can be changeable with occasional heavy rain, but beaches are quieter and deals are easier.