Mild
Average highs are around 25°C, so days are mild rather than hot.
May verdict
Saint Helena, Ascension and Tristan da Cunha in May
Weather score82Very good
Very good for holiday weather
Average highs are around 25°C, so days are mild rather than hot. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 7mm, which is relatively low for holiday planning.
May weather
Monthly averages
Temp
25°C
Rain
7mm
Sun
0h
Sea
24°C
Weather score
82
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 7mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 24°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Saint Helena, Ascension and Tristan da Cunha with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May25°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJanuary to April
This stretch sets the upper range for average daytime heat.
Rain
May7mm average rain
May is close to Saint Helena's usual rainfall pattern, with little seasonal change across the year.
Driest monthsAll year
Rainfall stays comparatively low through the year.
Sun
May0 hours average sun
May is close to Saint Helena's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
May24°C average sea
May sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaFebruary to May
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
May82 weather score
May sits close to Saint Helena's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJanuary to April
These months have the strongest weather score in the monthly averages.