Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
March verdict
Koh Samui, Thailand in March
Weather score79Very good
Very good for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 8.1h per day, so bright days are a strong part of the month. Rainfall averages 54mm, which is relatively low for holiday planning.
March weather
Monthly averages
Temp
30°C
Rain
54mm
Sun
8.1h
Sea
29°C
Weather score
79
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 54mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.1h per day, so bright days are a strong part of the month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Koh Samui, Thailand with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
March30°C average high
March is close to Koh Samui's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsApril to September
This stretch sets the upper range for average daytime heat.
Rain
March54mm average rain
March is one of Koh Samui's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
March8.1 hours average sun
March is one of Koh Samui's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsFebruary to April
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
March29°C average sea
March is close to Koh Samui's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaApril to September
Sea temperatures are usually near 30°C in this stretch, so swimming comfort is at its strongest.
Weather score
March79 weather score
March is one of Koh Samui's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsFebruary to March
These months have the strongest weather score in the monthly averages.
