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ThailandThailand Bangkok Province Koh Samui
Koh Samui
Weather averages
ClimateForecastJulyAugust >>

Koh Samui Climate by Month

The graphs below provide an overview of the climate in Koh Samui (Bangkok Province), Thailand. They present long-term patterns and averages of weather conditions over a 30-year period.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Average water temperature

The mean water temperature over the year.

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average humidity

The mean monthly relative humidity over the year

Forecast for Koh Samui

Sat   Jul 27
35°C | 27°C
W 18 km/h
19 mm
broken clouds and thunder

broken clouds and thunder

hourly forecast
Sun   Jul 28
33°C | 27°C
SW 14 km/h
11 mm
broken clouds and thunder

broken clouds and thunder

hourly forecast
Mon   Jul 29
33°C | 26°C
W 14 km/h
2.2 mm
broken clouds and thunder

broken clouds and thunder

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit Koh Samui in Thailand

Other facts from our historical weather data:

  • Which months have the greatest rainfall in Koh Samui?
    Most rainfall (rainy season) is seen in September, October, November and December.
  • Which is the hottest month in Koh Samui?
    May has an average maximum temperature of 31°C and is the hottest month of the year.
  • Which is the coolest month in Koh Samui?
    The coolest month is January with an average maximum temperature of 29°C.
  • Which is the wettest month in Koh Samui?
    October tops the wettest month list with 296 mm of rainfall.
  • Which is the driest month in Koh Samui?
    February is the driest month with 44 mm of precipitation.
  • Which is the sunniest month in Koh Samui?
    March is the sunniest month with an average of 240 hours of sunshine.

    • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

     

     

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