Porto weather in August 2025

Expect 77°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Porto in August. Check more long-term weather averages for Porto in August before you book your next holiday to Portugal in 2025/2026.

  • 77°F maximum daytime temperature in August in Porto77
    77°F max day temperature
  • 10 hours of sunshine per day
  • 5 days with some rainfall in August in Porto5
    5 days with some rainfall
  • 59°F minimum night-time temperature in August in Porto59
    59°F min night temperature
  • 14 hours of daylight per day in August in Porto14
    14 hours of daylight per day
  • No heat & humidity in August in Porto0
    No heat & humidity
  • 0.8 inches monthly rainfall in August in Porto0.8
    0.8 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Porto8
    8 (Very High) UV index
  • 64°F sea temperature in August in Porto64
    64°F sea temperature

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The August weather guide for Portugal (Porto) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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More about Portugal

How hot is it in Porto in August?

Daytime temperatures usually reach 77°F in Porto in August with no heat and humidity, falling to 59°F at night.

How sunny is it in Porto in August?

There are normally 10 hours of bright sunshine each day in Porto in August - that's 69% of daylight hours.

How warm is the sea around Porto in August?

The average sea temperature around Porto in August is 64°F.

Does it rain in Porto in August?

There are usually 5 days with some rain in Porto in August and the average monthly rainfall is 0.8 inches.

Porto August sunrise & sunset times

Browse the sunrise and sunset times for Porto in August 2025. Select a month to view Porto sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:30 19:51
Saturday, 16th August 2025 05:45 19:32
Sunday, 31st August 2025 06:00 19:09

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