ClimaGo › Koh Samui › Weather in January
Thailand
January brings perfectly warm and dry weather to Koh Samui with temperatures around 28°C, making it ideal for beach days, snorkeling and island hopping while enjoying clear blue skies.
Avg High
29°C
Avg Low
24°C
Daily Rain
3mm
Rainfall
Moderate
✅ January is one of the best months to visit Koh Samui!
This tropical island paradise features white-sand beaches, coconut palms, luxury resorts, nightlife and perfect-postcard island tranquility.