Monthly climate guide
Porto weather in August
Expect warm weather in Porto in August: afternoons reach about 25°C (76°F), while nights drop to around 16°C (61°F). Around 19 mm of rain falls over the month (very dry), and skies are mostly sunny. Daytime highs are about the same as July and about the same as September.
What stands out in August
- Porto is usually about 5°C cooler than Braga, 50 km away, in August.
- August brings late summer to Porto.
- It's one of the sunniest months here, with cloud cover around 30%.
- It's one of the drier months, with about 77% less rain than Porto's average.
August is typically Porto's warmest month.
Avg high
25°C
76°F
Avg low
16°C
61°F
Rainfall
19 mm
very dry
Humidity
73%
relative
Sky
30%
cloud · mostly sunny
Porto weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 13°C / 56°F | 8°C / 47°F | 130 mm | 86% | 54% |
| February | 14°C / 56°F | 8°C / 46°F | 100 mm | 83% | 51% |
| March | 15°C / 60°F | 9°C / 48°F | 108 mm | 81% | 49% |
| April | 17°C / 63°F | 11°C / 52°F | 102 mm | 81% | 52% |
| May | 20°C / 68°F | 13°C / 55°F | 72 mm | 79% | 43% |
| June | 22°C / 71°F | 15°C / 58°F | 29 mm | 76% | 41% |
| July | 24°C / 76°F | 16°C / 61°F | 9 mm | 74% | 28% |
| August | 25°C / 76°F | 16°C / 61°F | 19 mm | 73% | 30% |
| September | 24°C / 75°F | 16°C / 61°F | 52 mm | 73% | 34% |
| October | 21°C / 70°F | 14°C / 58°F | 118 mm | 77% | 46% |
| November | 16°C / 61°F | 11°C / 52°F | 145 mm | 84% | 53% |
| December | 14°C / 58°F | 9°C / 49°F | 114 mm | 85% | 54% |
What to pack for August
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- Sunglasses
Is August a good time to visit Porto?
Our Porto guide recommends: May to June or September, for mild weather without peak summer crowds.
Cross the river to Vila Nova de Gaia for port wine cellar tours — most of the historic producers are based there, not in Porto itself.
Best time to visit Porto →Other Portugal cities in August
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Porto weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/portugal/porto/august
<a href="https://weathercompare.eu/weather/portugal/porto/august">Porto weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/portugal/porto" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Porto weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/portugal/porto/august">Porto weather in August</a> – WeatherCompare</p>
Porto in August: quick answers
Is August a good time to visit Porto?
Yes. August is one of the best months for Porto, with highs around 25°C and about 19 mm of rain.
How warm is Porto in August?
Average highs are about 25°C (76°F) and average lows about 16°C (61°F), based on 10 years of daily data.
Does it rain a lot in Porto in August?
Porto typically gets around 19 mm of rain in August — very dry.
When is the best time to visit Porto?
May to June or September, for mild weather without peak summer crowds.
Figures are long-term averages for the area around Porto (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.