Cool
Average highs are around 20°C, so pack for cooler days.
May verdict
Porto, Portugal in May
Weather score45Mixed
Mixed for holiday weather
Average highs are around 20°C, so pack for cooler days. Sunshine averages 8.5h per day, so bright days are a strong part of the month. Rainfall averages 87mm, so some wet days are possible.
May weather
Monthly averages
Temp
20°C
Rain
87mm
Sun
8.5h
Sea
16°C
Weather score
45
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 87mm, so some wet days are possible.
Bright
Sunshine averages 8.5h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 16°C, so the water can feel cool.
Map
Weather map
Compare Porto, Portugal with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May20°C average high
May is close to Porto's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May87mm average rain
May sits near Porto's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJune to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May8.5 hours average sun
May is brighter than Porto's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May16°C average sea
May is close to Porto's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJune to October
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
May45 weather score
May sits close to Porto's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
