Ko Samui Weather in March
What's the weather like in Ko Samui (Surat Thani) in March 2025?
The climate in Ko Samui during March can be summarized as hot, humid and reasonably dry.
March is in the spring in Ko Samui and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (87°F), whilst at night 24°C (75°F) is normal.
| Daytime temperature | 30.4°C 86.7°F |
|---|---|
| Nightly temperature | 24°C 75.2°F |
| Average temperature | 27.2°C 81°F |
| Daily sunshine | 8.7 hrs |
| Avg rainfall | 54 mm 2.1 ins |
| Rainy days | 5 days |
| Sea temperature | 29.1°C 84.3°F |
| Humidity | 78% |
| Windspeed | 9.4kph 6 mph |
On average March is the 2nd driest month of the year in Ko Samui with around 54mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.7 hours of sunshine per day.
March temperatures in Ko Samui
March rainfall
March hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ko Samui in March 2025.
Other monthly averages
Ko Samui weather stats
| Hottest month: | April | 31.6°C 88.9°F |
|---|---|---|
| Driest month: | February | 39mm 1.5ins |
| Sunniest month: | February | 8.7hrs |
| Coldest month: | January | 28.4°C 83.1°F |
| Wettest month: | November | 463mm 18.2ins |
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