Ko Samui, Surat Thani, Thailand Climate Change Severity
High
Ko Samui Weather Condition Changes (Historic Vs 2025)
Over the past 15 year(s), Ko Samui temperature has changed by around -0.8%, and has experienced notable climate changes.
Comparison of Weather Condition (Historic Vs 2025)
HistoricDays
Year 2025Days
Change
Sunny
Cloudy
Rainy
Snowy
MistyDisclaimer: Other weather conditions not shown may affect the total day count.
Climate Change Indicators:
Over the past 15 years, Ko Samui has experienced measurable shifts in key climate parameters, contributing to the current severity score of 57 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:
Severity Score
57/100
High
From 2010 to 2025, Ko Samui experienced significant changes:
Temperature change of
-0.2 °C
Variation in annual rainfall
+0.5 %
Change in average humidity
-1.5 %
PM2.5 levels surged by
-30.6 %
Heatwave changed by
-5 day(s)
Coldwave changed by
-15.8 day(s)
Wind speeds changed by
+4.7 km/h
These indicators show that Ko Samui is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.
Ko Samui Weather Forecast 30 Days (September - October 2025)Ko Samui, Surat Thani, Thailand
Temperature
humi.
Wind Speed
Heavy rain28°/27°77%24km/h
Moderate rain29°/27°75%23km/hHeavy rain28°/27°77%25km/hPatchy rain nearby29°/28°74%29km/hModerate rain28°/27°76%29km/hPatchy rain nearby29°/27°74%40km/hPatchy rain nearby30°/28°70%28km/h
Partly Cloudy 29°/28°70%20km/hSunny28°/28°70%15km/hPartly Cloudy 29°/28°69%21km/hPatchy rain nearby28°/28°72%32km/hPatchy rain nearby28°/27°75%42km/hPatchy rain nearby28°/27°75%46km/hPatchy rain nearby27°/26°76%44km/h
Moderate or heavy rain shower29°/27°75%21km/hModerate or heavy rain shower29°/27°75%20km/hModerate or heavy rain shower29°/27°74%19km/hModerate or heavy rain shower29°/28°75%18km/hModerate or heavy rain shower29°/27°76%18km/hModerate or heavy rain shower29°/27°77%19km/hModerate or heavy rain shower29°/27°76%20km/hModerate or heavy rain shower29°/27°76%19km/hModerate or heavy rain shower28°/27°77%18km/hModerate or heavy rain shower28°/27°76%19km/hModerate or heavy rain shower29°/27°76%18km/hModerate or heavy rain shower29°/27°76%19km/hModerate or heavy rain shower29°/27°76%16km/hModerate or heavy rain shower29°/27°75%18km/hModerate or heavy rain shower29°/27°75%18km/hModerate or heavy rain shower29°/27°75%19km/hModerate or heavy rain shower29°/27°75%19km/hHighest & Lowest Weather Forecasts
TemperatureHumidityWind Speed
Precipitation
UV
