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Koh Samui weather in October 2025
Expect 86°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Koh Samui in October. Check more long-term weather averages for Koh Samui in October before you book your next holiday to Thailand in 2025/2026.
- 8686°F max day temperature
- 6 hours of sunshine per day
- 2020 days with some rainfall
- 7373°F min night temperature
- 1212 hours of daylight per day
- HHigh heat & humidity
- 10.810.8 inches of monthly rainfall
- 1111+ (Extreme) UV index
- 8484°F sea temperature
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Recommended for Thailand
The October weather guide for Thailand (Koh Samui) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C) | Imperial (°F)
More about Thailand
How hot is it in Koh Samui in October?
Daytime temperatures usually reach 86°F in Koh Samui in October with high heat and humidity, falling to 73°F at night.
How sunny is it in Koh Samui in October?
There are normally 6 hours of bright sunshine each day in Koh Samui in October - that's 48% of daylight hours.
How warm is the sea around Koh Samui in October?
The average sea temperature around Koh Samui in October is 84°F.
Does it rain in Koh Samui in October?
There are usually 20 days with some rain in Koh Samui in October and the average monthly rainfall is 10.8 inches.
What is the chance of a typhoon in Koh Samui in October?
On average less than 1 day in October in Koh Samui is likely to be affected by the passage of one or more tropical storms.
Koh Samui October sunrise & sunset times
Browse the sunrise and sunset times for Koh Samui in October 2025. Select a month to view Koh Samui sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Wednesday, 1st October 2025 | 06:08 | 18:10 |
Thursday, 16th October 2025 | 06:08 | 18:02 |
Friday, 31st October 2025 | 06:10 | 17:57 |
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