Ko Samui in March usually sees fair weather conditions, with an average daily high temperature of +81°F and roughly 6 sunny days. However, you should prepare for about 11 rainy days with an average precipitation of 60 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+81°F
Avg. max. temperature
+70°F
Min.
+88°F
Max.
60 mm
Total precipitation
78%
Avg. humidity
3 m/s
Avg. wind
6 ☀️
Sunny Days
10 ⛅️
Cloudy
11 🌦
Rainy
Our opinion: Ko Samui has OK weather in March.
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Average temperature in Ko Samui in March
Here are the expected maximum, average and minimum temperatures in Ko Samui for March based on the historical data.
Last Year
Historical Data
The temperature in March is +79°F on average, with a range between a maximum of +81°F during the day and a minimum of +73°F at night.
The average maximum temperature goes up 25% by the end of the month, compared with the beginning of the month, from +79°F to +81°F.
Is Ko Samui warm or cold in March?
Ko Samui is typically warm in March.
Maximum temperatures go up compared to the previous month from +79°F to +81°F. The minimum temperature also goes up from +75°F to +77°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how March is compared to other months in Ko Samui:
Water temperature in Ko Samui in March
Water in Ko Samui in March is Very warm. It varies from +82°F to +86°F, with an average of +84°F.Note that the air temperature is lower than the water temperature, averaging around +81°F.
In March, water temperatures are average relative to the rest of the year:
The warmest water temperatures in Ko Samui are reached in May, when the average sea temperature rises to +86°F. The coldest water temperatures are in January, with an average of +82°F.
Can you swim in Ko Samui in March?
You can definitely swim in Ko Samui in March, the water is very warm (+84°F in average), and might even be unpleasant for ones who like it more fresh.
🦭
Cold
Below +61°F
🏄♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
Don't forget sunscreen and a hat, it's going to be hot!
Climate in Ko Samui in March
Ko Samui weather looks like this, on average, in March and the surrounding months.
February
March
April
Avg. temperature
+79°F
+81°F
+81°F
Min. temperature
+63°F
+70°F
+70°F
Max. temperature
+90°F
+88°F
+91°F
Rainfall
29 mm
60 mm
86 mm
Wind
3 m/s
3 m/s
2 m/s
Avg. water temperature
+82°F
+84°F
+86°F
Humidity
78%
78%
78%
Air pressure
1011 HPa
1010 HPa
1008 HPa
Sunny days
5
6
3
Cloudy days
11
10
6
Rainy days
11
11
12
Snowy days
0
0
0
March typically has worse weather conditions compared to February.It’s getting warmer as March arrives. The average maximum temperature goes up from +79°F to +81°F during the day.Prepare for more rain. Average rainfall goes from 29 mm to 60 mm.Humidity levels don’t change as the month goes on, averaging around 78%.The average wind speed doesn’t change much during March, staying around 3 m/s.The good news is there are likely to be more sunny days in March, from 5 to 6.
April brings much the same weather, it remains ok.
Wind speed in Ko Samui in March based on historical data.
Last Year
Historical Data
The average wind speed is 4 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Ko Samui is gradually increasing during March, going from 3 m/s to 4 m/s over the course of the month.
Rain
Amount of rainfall in mm during March in Ko Samui based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in March stands at 10%, leading to total precipitation of around 8 mm. The maximum amount of rainfall per day is around 4 mm, which is considered light rain.Ko Samui is amazing in March with as little as 3 rainy days on average, so plan adventures in the great outdoors.
Here’s how March is compared with other months in the amount of precipitation, total mm:
Ko Samui wettest month is November, where a typical day has a 57% chance of precipitation and 278 mm of rainfall per day. February, on the other hand, is the driest month with a mere 38% chance of precipitation and 29 mm of rainfall per day.
How was the weather last March in Ko Samui?
This is the weather in Ko Samui in March 2023:
1 March
☁️
+80°F
2 March
☀️
+78°F
3 March
🌧️
+75°F
4 March
☀️
+78°F
5 March
☀️
+76°F
6 March
☀️
+77°F
7 March
☀️
+78°F
8 March
☀️
+77°F
9 March
☀️
+77°F
10 March
☀️
+78°F
11 March
☀️
+78°F
12 March
☀️
+78°F
13 March
☀️
+78°F
14 March
☀️
+77°F
15 March
☀️
+78°F
16 March
☀️
+79°F
17 March
☀️
+77°F
18 March
☀️
+78°F
19 March
☀️
+78°F
20 March
☀️
+79°F
21 March
☀️
+78°F
22 March
☀️
+80°F
23 March
☀️
+80°F
24 March
☀️
+81°F
25 March
☀️
+81°F
26 March
☀️
+80°F
27 March
☀️
+80°F
28 March
☀️
+80°F
29 March
☀️
+81°F
30 March
☀️
+81°F
31 March
☀️
+81°F
In March 2023 Ko Samui had 29 sunny days, 1 cloudy days, and 1 rainy days. The average maximum temperature was +79°F, with an absolute maximum of +81°F and a minimum of +75°F. The average humidity was 79%, with a maximum of 89% and a minimum of 72%. The average wind speed was 4 m/s, with a maximum of 7 m/s and a minimum of 0 m/s.
Are you planning a trip in March?
Climate Change Over the Years
This is how Ko Samui climate has changed over the last 43 years.
The climate in Ko Samui in March has not changed that much over the last 43 years.
The average temperature was the lowest in 1986 (+79°F) and the highest in 2012 (+83°F). The driest year was 1997 with only 927 mm of rainfall, and the wettest year was 1999 with 1981 mm.
FAQ
Frequently asked questions about the weather in Ko Samui in March:
Is March a good time to visit Ko Samui?
It’s always a good time to visit Ko Samui, but the weather is changeable in March, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Ko Samui in March?
March is warm in Ko Samui. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Can you swim in Ko Samui in March?
Yes, you can swim in Ko Samui in March, the water is very warm, with temperature averaging at +84°F, but it's important to manage hydration and sun exposure.
Is Ko Samui rainy in March?
Ko Samui is often rainy in March. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Ko Samui in March?
Usually, it’s not very sunny in Ko Samui in March, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Thailand
Check out the weather for other cities in Thailand.
For this page, we’ve looked at the typical weather in Ko Samui, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
