ThailandThe weather in March in Ko Samui
It's hot in March in Ko Samui with an average temperature of 32°C. Temperatures this month range from a low of 31°C to a high of 33°C. At night, you can expect temperatures between 26°C and 28°C.
March is a good month to be in Ko Samui for sunny weather. You’ll have high temperatures and not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in March for Ko Samui, Thailand. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 39°C in 2015, Ko Samui reached the highest temperature in March over the past 10 years. The lowest daytime temperature in this month was 28°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 23°C to a highest value of 29°C.
Water temperature
The water temperature at Ko Samui is 30°C this month. It’s really warm, perfect for a swim.
Rainfall amount
In March, there is an average of 52 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in March for Ko Samui
Click on any day in March to get detailed info about the usual weather on that day in Ko Samui. Check out the historical temperatures and precipitation over the past 10 years on this day.
March weather comparison
| Ko Samui | New York | |
|---|---|---|
| Average temperature | 32°C | 11°C |
| Max. temperature | 33°C | 14°C |
| Min. temperature | 26°C | -5°C |
| Total precipitation | 52 mm | 63 mm |
| Rainy days | 9 days | 10 days |
Start of March
The month of March starts in Ko Samui with hot temps, averaging around 32°C during the day and nights around 27°C.
Mid March
By mid-March, daytime temps stay steady at around 32°C, with nights around 28°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of March
By the end of March, the average daytime temperature in Ko Samui is around 33°C, while nighttime temps are about 28°C. A shower might pop up, but overall, the weather will be dry and sunny.
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Ko Samui for all months and discover the best travel time
Curious about the weather in other parts of Thailand? Check out the climate and weather for spots like Bangkok, Chiang Mai, Phuket, or explore other destinations in Thailand.
Temperature charts
These charts show the average temperatures in March in Ko Samui, Thailand. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in March in Ko Samui
Temperature in March in Ko Samui over the years
Precipitation charts
These charts show the average amount of precipitation in March in Ko Samui, Thailand. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in March in Ko Samui
Total precipitation in March in Ko Samui over the years
Daily UV index in March in Ko Samui
This chart shows the average daily UV index in March 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.
Weather experiences in March in Ko Samui
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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.