Mild
Average highs are around 25°C, so days are mild rather than hot.
Weather Guide
Porto, Portugal Average Monthly Weather
Weather score39Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 19°C, sunshine averages 6.7h per day, and rainfall totals about 1237mm. Sea temperatures average 15°C across the year.
Annual weather
Annual averages
Temp
19°C
Rain
1237mm
Annual total
Sun
6.7h
Sea
15°C
Weather score
39
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 20mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9.5h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 17°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
August25°C average high
August is one of Porto's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August20mm average rain
August is one of Porto's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJune to September
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August9.5 hours average sun
August is one of Porto's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August17°C average sea
August is one of Porto's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJune to October
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
August69 weather score
August is one of Porto's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
