Koh Samui Weather in December

Warm and pleasant, with frequent heavy rain. Average highs of 25°C and lows of 22°C, with around 20 rainy days expected throughout the month.

While December isn't our top-rated month for Koh Samui, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.

Average high

25°C

Average low

22°C

Rainy days

20 days

Best months to visit

February, March

What to do in Koh Samui in December

Whatever the weather, Koh Samui rewards curious visitors. Here are some of the best ways to spend your time:

Visit iconic Koh Samui attractions and temples Explore local markets and traditional neighborhoods Experience regional cuisine and dining specialties Trek or hike nearby mountains or natural features Engage with local culture and minority communities Photography opportunities at scenic viewpoints

What to pack for December

Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.