Temperatures in August
It's hot in August in Ko Samui with an average temperature of 33°C. Temperatures this month range from a low of 32°C to a high of 34°C. At night, you can expect temperatures between 27°C and 27°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Ko Samui in August. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of August
The month of August starts in Ko Samui with hot temperatures, averaging around 33°C during the day and nights close to 27°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-August
By mid-August, the average daytime temperature rises to around 34°C, with nights close to 27°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of August
By the end of August, the average daytime temperature in Ko Samui will be around 34°C, with nights close to 27°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Water temperature
The water temperature at Ko Samui is 31°C this month. It’s really warm, perfect for a swim.
Precipitation in August
In August, there is an average of 123 mm of precipitation, spread over 18 days. The wind speed is around 4 Bft, mostly coming from the West.
Across the whole month, the average precipitation chance is 57% per day. Though that seems frequent, the weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in August for Ko Samui. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Ko Samui in August |
London | ||
|---|---|---|---|
 Average Temperature |
33°C | 22°C | |
 High Temp |
34°C | 24°C | |
| Low Temp |
32°C | 19°C | |
 Total Precipitation |
123 mm | 60 mm | |
| Rainy Days |
18 days | 10 days | |
July
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is August a good time to visit Ko Samui?
After some sun? Then August isn’t the best time to be in Ko Samui. The temperature is pleasant, but there’s too much chance of rain this month.
The typhoon season in Ko Samui runs from June to November.
Temperature records for Ko Samui in August
With 36°C, Ko Samui hit the highest temperature in the last 10 years in August 2023. The lowest daytime temperature in this month was 28°C in 2015. The extreme night temperatures ranged from a low of 23°C to a high of 29°C.
Check out the climate of Ko Samui for all months and discover the best travel time
Curious about the climate in other parts of Thailand? Check out the weather and climate in places like Bangkok, Chiang Mai, Phuket, or have a look at other destinations in Thailand.
Daily Temperature in August in Ko Samui
This chart shows the average daily temperatures, both day and night, for each day in August in Ko Samui, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in August in Ko Samui
The chart below shows the average daily precipitation in August for Ko Samui, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 18 days of rain in Ko Samui.
Daily UV Index in August in Ko Samui
This chart shows the average daily UV index in August in Ko Samui, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in August in Ko Samui Over the Years
This chart shows the average temperature in August in Ko Samui, measured in degrees Celsius, over the past years.
Total Precipitation in August in Ko Samui Over the Years
This chart shows the average precipitation in August in Ko Samui, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in August for Ko Samui
Click on a specific day in August for detailed info on the typical weather on that day in Ko Samui. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in August in Ko Samui
Have you been to Ko Samui in August?
Share your weather experience in August in Ko Samui.
Average Weather in Ko Samui by Month
Click on a month below to see detailed weather info for Ko Samui. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
