Weather now in Koh Samui
Updated: Jun 4, 00:49 Thailand time
Partly cloudy. Feels like 25°C.
16-day weather calendar
Forecast-style calendar based on available API data.
Seasonal travel notes for Koh Samui
Mixed season
January to April
Weather can vary, but that does not make it a bad time to visit. Plan with flexibility and keep backup indoor or short-distance options.
Thailand has no bad seasons — only different travel styles. Koh Samui has a different weather pattern from Phuket, so planning by region matters.
Same period last year in Koh Samui
Historical weather from 2025-06-03 to 2025-06-18. Updated: Jun 4, 00:49 Thailand time.
Historical values are based on archived weather datasets and may differ from observations at a specific local station.