Average Monthly Sunshine hours in Koh Samui

This graph shows the average number of hours per month that Koh Samui receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, March is the sunniest month with 240 hours of sunshine.
• September has on average the lowest amount of sunshine with 145 hours.
• On average, the total annual amount of sun is 2150 hours.

Forecast: is it sunny in Koh Samui?

Sun   Sep 08

33°C | 26°C

SW 25 km/h

1.9 mm

broken clouds and chance of rain

hourly forecast

Mon   Sep 09

33°C | 26°C

SW 22 km/h

2.7 mm

broken clouds and rain

hourly forecast

Tue   Sep 10

33°C | 26°C

SW 22 km/h

1.7 mm

broken clouds and slight rain

hourly forecast

5-Day Forecast 10-Day Forecast