Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
September verdict
Kosgoda, Sri Lanka in September
Weather score56Good
Good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 5.9h per day, enough for a balanced month. Rainfall averages 270mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
29°C
Rain
270mm
Sun
5.9h
Sea
28°C
Weather score
56
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 270mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.9h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Kosgoda, Sri Lanka with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September29°C average high
September is close to Kosgoda's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September270mm average rain
September is wetter than Kosgoda's yearly average, so flexible plans matter more.
Driest monthsJanuary to March, August, and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.9 hours average sun
September is one of Kosgoda's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsFebruary to March
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September28°C average sea
September is one of the cooler sea months locally, though the water still averages warm enough for most swimmers.
Warmest seaMarch to May
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
September56 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to March
These months have the strongest weather score in the monthly averages.
