Will it rain in Ko Samui on Sunday, October 18, 2026?

Yes, the chance of rain is 96%, with 7.2 mm of rain expected in total.

What will the temperature be in Ko Samui on Sunday, October 18, 2026?

A high of 26°C and a low of 22°C are expected. Conditions: light showers.

What time are sunrise and sunset in Ko Samui on October 18, 2026?

Sunrise is at 06:08 and sunset at 18:01 (local time); day length 11 h 54 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 Tomorrow

Ko Samui · Sunday, October 18 2026

26°22°

Light showers

High 26°, low 22°

Chance of rain: 96%; 7.2 mm
Wind: 9 km/h; northeast
UV index: 7; High
Sunrise: 06:08; Sunset 18:01
Day length: 11 h 54 min
Moon: First quarter; 51% illuminated

Updated: 6 h ago · Source: Open-Meteo

Forecast for Ko Samui on Sunday, October 18, 2026: light showers, with a high of 26°C and a low of 22°C. The chance of rain is 96%, with 7.2 mm of precipitation expected in total. Wind from the northeast at up to 9 km/h. Sunrise is at 06:08 and sunset at 18:01; day length 11 h 54 min. 3° cooler than the previous day. Temperatures are close to the 7-day average. Rain is most likely between 00:00 and 19:00.

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 (7): sunscreen, a hat and sunglasses are recommended.

Tomorrow will be 3° cooler than today.

Sunday, October 18: hour by hour

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Weather nearby on October 18

Frequently asked questions

Will it rain in Ko Samui on Sunday, October 18, 2026?: Yes, the chance of rain is 96%, with 7.2 mm of rain expected in total.
What will the temperature be in Ko Samui on Sunday, October 18, 2026?: A high of 26°C and a low of 22°C are expected. Conditions: light showers.
What time are sunrise and sunset in Ko Samui on October 18, 2026?: Sunrise is at 06:08 and sunset at 18:01 (local time); day length 11 h 54 min.
How reliable is this forecast?: Forecasts for the first 3 days are usually highly accurate; this page is updated about every 30 minutes.