The weather in March in Koh Samui

It's hot in March in Koh 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 27°C.

March is a good month to be in Koh 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 Koh 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, Koh 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.

Rainfall amount

In March, there is an average of 50 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the Southeast.

Daily weather in March for Koh Samui

Click on any day in March to get detailed info about the usual weather on that day in Koh Samui. Check out the historical temperatures and precipitation over the past 10 years on this day.

1

31° / 26°

2

31° / 27°

3

31° / 27°

4

31° / 27°

5

32° / 26°

6

32° / 27°

7

32° / 27°

8

32° / 26°

9

32° / 27°

10

32° / 27°

11

32° / 26°

12

32° / 27°

13

32° / 27°

14

32° / 27°

15

32° / 27°

16

32° / 27°

17

32° / 27°

18

32° / 27°

19

32° / 27°

20

32° / 26°

21

32° / 26°

22

33° / 26°

23

33° / 27°

24

33° / 27°

25

32° / 27°

26

33° / 27°

27

33° / 27°

28

33° / 27°

29

32° / 27°

30

33° / 27°

31

33° / 27°

Start of March

The month of March starts in Koh 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 27°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 Koh Samui is around 33°C, while nighttime temps are about 27°C. A shower might pop up, but overall, the weather will be dry and sunny.

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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 Koh Samui for all months and discover the best travel time

Temperature charts

These charts show the average temperatures in March in Koh 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 Koh Samui

Temperature in March in Koh Samui over the years

Precipitation charts

These charts show the average amount of precipitation in March in Koh 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 Koh Samui

Total precipitation in March in Koh Samui over the years

Daily UV index in March in Koh Samui

This chart shows the average daily UV index in March in Koh 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.

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Average weather in Koh Samui by month

Click on a month below to see detailed weather info for Koh Samui. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.