Will it rain in Ko Samui on Wednesday, October 21, 2026?

Yes, the chance of rain is 94%, with 8.8 mm of rain expected in total.

What will the temperature be in Ko Samui on Wednesday, October 21, 2026?

A high of 25°C and a low of 21°C are expected. Conditions: light showers.

What time are sunrise and sunset in Ko Samui on October 21, 2026?

Sunrise is at 06:08 and sunset at 18:00 (local time); day length 11 h 52 min.

How reliable is this forecast?

Forecasts for the first 3 days are usually highly accurate; this page is updated about every 30 minutes.

Weather · Thailand

Ko Samui Weather on Wednesday, October 21, 2026

Ko Samui · Wednesday, October 21 2026

25°21°

Light showers

High 25°, low 21°

Chance of rain: 94%; 8.8 mm
Wind: 8 km/h; east
UV index: 9; Very high
Sunrise: 06:08; Sunset 18:00
Day length: 11 h 52 min
Moon: Waxing gibbous; 81% illuminated

Updated: 8 h ago · Source: Open-Meteo

Forecast for Ko Samui on Wednesday, October 21, 2026: light showers, with a high of 25°C and a low of 21°C. The chance of rain is 94%, with 8.8 mm of precipitation expected in total. Wind from the east at up to 8 km/h. Sunrise is at 06:08 and sunset at 18:00; day length 11 h 52 min. Temperatures similar to the previous day. Temperatures are close to the 7-day average. Rain is most likely between 00:00 and 00:00.

What to wear and what to watch out for

Take an umbrella or a raincoat with you.
Mild weather: light clothing is enough.
High UV index (9): sunscreen, a hat and sunglasses are recommended.

Wednesday, October 21: hour by hour

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Weather nearby on October 21

Frequently asked questions

Will it rain in Ko Samui on Wednesday, October 21, 2026?: Yes, the chance of rain is 94%, with 8.8 mm of rain expected in total.
What will the temperature be in Ko Samui on Wednesday, October 21, 2026?: A high of 25°C and a low of 21°C are expected. Conditions: light showers.
What time are sunrise and sunset in Ko Samui on October 21, 2026?: Sunrise is at 06:08 and sunset at 18:00 (local time); day length 11 h 52 min.
How reliable is this forecast?: Forecasts for the first 3 days are usually highly accurate; this page is updated about every 30 minutes.