See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
26°
Drizzle and Humid
Feels Like: 34°
Min: 26°
Max: 32°
The next few hours will be overcast, with tomorrow reaching 31°C and dropping to 26°C. The coming days will be light rain throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:14
Sunrise
18:21
Sunset
Moon
Waning Crescent
03:17
Moonrise
15:21
Moonset
Daily Forecast
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Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
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Weather in Ko Samui tomorrow, September 08, 2026
Rain features in Ko Samui on September 08, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. Early hours look the most unsettled, with rain probability near 26% by 00:00. The thickest cloud arrives around 06:00, reaching about 86%.
Temperatures climb from an overnight low near 26°C toward a daytime high of about 31°C. Moisture in the air spans 63%–95%, with the highest values around 00:00. A lighter breeze peaks around 16:00 near 5.2 km/h.
The second half of the day still looks unsettled, with rain probability around 70% by 14:00. Dense cloud near 87% at 21:00 keeps the feel grey. Expect visibility near 15.8 km, with poorer spells close to 8.8 km. Expect sunrise at 06:13, sunset at 18:20, and 12 hours 6 minutes of sunlight today overall.
In short, treat September 08, 2026 in Ko Samui as a damp day: pack covers, watch the wetter hours, and expect a high near 31°C.
Frequently asked questions about weather in Ko Samui
How warm does it get in Ko Samui?
The warmest month in Ko Samui is January, with average high temperatures of 5°C. The average temperature during this period is around 3°C.
How cold does it get in Ko Samui?
The coldest month in Ko Samui is December, with average low temperatures of -1°C. The average temperature during this period is around -1°C.
What is the wettest time of year in Ko Samui?
The wettest month in Ko Samui is October, with an average of 33mm of precipitation.
What is the driest time of year in Ko Samui?
The driest month in Ko Samui is December, with an average of 9mm of precipitation.
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