Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
May verdict
Sri Lanka in May
Weather score65Good
Good for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 6.4h per day, enough for a balanced month. Rainfall averages 138mm, so some wet days are possible.
May weather
Monthly averages
Temp
31°C
Rain
138mm
Sun
6.4h
Sea
25°C
Weather score
65
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 138mm, so some wet days are possible.
Some sun
Sunshine averages 6.4h per day, enough for a balanced month.
Swimmable
Sea temperatures average 25°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Sri Lanka with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May31°C average high
May is one of Sri Lanka's warmest months, with daytime heat above the yearly average.
Warmest monthsMarch to September
This stretch sets the upper range for average daytime heat.
Rain
May138mm average rain
May sits on the drier side of Sri Lanka's year, which helps with sightseeing and transfers.
Driest monthsJanuary to March and May to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May6.4 hours average sun
May is below Sri Lanka's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsFebruary to April
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May25°C average sea
May sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaMarch to June and October to November
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
May65 weather score
May sits close to Sri Lanka's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to March and June to August
These months have the strongest weather score in the monthly averages.
