Weather in Ko Samui in August

General weather information about Ko Samui

Average annual temperature is 27.9 °C

Absolute maximum temperature: 35.3 °C

Absolute minimum temperature: 22.1 °C

Number of sunny days: 39 days

Number of rainy days: 326 days

Look at detailed online map of Ko Samui

* Weather data for Ko Samui Thailand is based on climate observations for 2026 year

Ko Samui air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)30.030.632.534.635.332.733.633.431.431.130.830.2
Average daytime temperature (°C)28.429.230.332.832.531.130.431.729.729.829.129.0
Average temperature (°C)26.326.927.529.829.728.728.128.727.527.626.927.1
Average night temperature (°C)24.224.725.427.527.426.826.326.625.825.525.125.4
Absolute minimum temperature (°C)22.123.224.025.925.524.924.025.825.024.123.723.7

Ko Samui monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)11.011.012.012.012.012.012.012.012.012.011.011.0
Daylight mean duration (h)11.611.812.112.312.612.712.612.412.211.911.711.6
Daylight minimum duration (h)11.011.011.012.012.012.012.012.012.011.011.011.0
Sunshine mean duration (h)9.610.510.811.110.99.48.210.78.49.67.89.9
Precipitation (mm)686430339012717211125220631079
Sunny days4416433310010
Rainy days272415262827283030312931
Snow days000000000000

Ko Samui - weather forecast by months

Ko Samui weather in januaryKo Samui weather in februaryKo Samui weather in marchKo Samui weather in aprilKo Samui weather in mayKo Samui weather in juneKo Samui weather in julyKo Samui weather in augustKo Samui weather in septemberKo Samui weather in octoberKo Samui weather in novemberKo Samui weather in december

Best time to visit Ko Samui:

The largest precipitation sum in Ko Samui is at

  • July — 172(mm)
  • September — 252(mm)
  • October — 206(mm)
  • November — 310(mm)

    • Weather forecast in the closest to Ko Samui admin centers

    Weather forecast in the closest towns to Ko Samui

    Explore Ko Samui

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

    When is the best time to visit Ko Samui?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Ko Samui.
    What is the weather like in Ko Samui?
    See average temperature, rainfall and daylight hours for Ko Samui by month in the table above.
    How many sunny days does Ko Samui have?
    The monthly weather statistics above show sunshine and rainfall patterns for Ko Samui throughout the year.