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Porto weather in August 2025
Expect 25°C 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.
- 25°C max day temperature
25 - 10 hours of sunshine per day
- 5 days with some rainfall
5 - 15°C min night temperature
15 - 14 hours of daylight per day
14 - No heat & humidity
0 - 20 mm of monthly rainfall
20 - 8 (Very High) UV index
8 - 18°C sea temperature
18
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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 / mm) | Imperial (°F / inches)
More about Portugal
How hot is it in Porto in August?
Daytime temperatures usually reach 25°C in Porto in August with no heat and humidity, falling to 15°C 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 18°C.
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 20mm.
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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