Weather in Ko Samui in March 2025
Average weather
Average temperature in Ko Samui in March
The temperature in March is +81°F on average, with a range between a maximum of +82°F during the day and a minimum of +75°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 down 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:
Climate in Ko Samui in March
| 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 | ||||||
| 30 mm | 61 mm | 88 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 2 m/s | ||||
| Humidity | ||||||
| 77% | 77% | 78% | ||||
| Air pressure | ||||||
| 1010 HPa | 1009 HPa | 1008 HPa | ||||
| Sunny days | ||||||
| 7 | 9 | 5 | ||||
| Cloudy days | ||||||
| 19 | 18 | 17 | ||||
| Rainy days | ||||||
| 2 | 4 | 8 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
March weather is still as good as in 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 30 mm to 61 mm. Humidity levels don’t change as the month goes on, averaging around 77%. 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 7 to 9.
Next month (April) brings a further decline in the weather.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Ko Samui is gradually decreasing during March, going from 5 m/s to 3 m/s over the course of the month.
Rain
How was the weather last March in Ko Samui?
Climate Change Over the 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 2008 (+83°F) and the highest in 2010 (+87°F). The driest year was 1992 with only 1 mm of rainfall, and the wettest year was 2011 with 805 mm.
FAQ
Is March a good time to visit Ko Samui?
Can you sunbathe in Ko Samui in March?
Is Ko Samui rainy in March?
Is it sunny in Ko Samui in March?
Other cities in Thailand
Monthly weather in Ko Samui
Source of the data
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, 2022.
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.