Porto Weather in August
Porto in August sees high temperatures, with highs around 25°C (77°F) and overnight lows of 18°C (64°F). Overall excellent conditions make it one of the better months to visit.
Rainfall in Porto in August
Analyzing past climate data, one can expect approximately 6 days of rain, averaging 27 mm (1.1 in). The occasional light shower is possible, but rain is rarely an issue this month.
Temperature in Porto in August
The temperature in Porto in August is excellent. Daytime highs reach 25°C (77°F), with nights dropping to 18°C (64°F). August is known for being in the summer season. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions. On average, it is the month with the highest temperature of the year.
Sunshine in Porto in August
There are approximately 295 hours of sunshine this month, resulting in mostly clear days.
Wind Speed in Porto in August
In August, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.
Average water temperature in August
At 18°C (64°F), the water is getting there, comfortable enough for most swimmers, though those used to warmer seas may still find it a touch cool.If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit Porto.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Porto's climate page.
Porto Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
25°C (77°F)
Water Temperature
18°C (64°F)
Chance of Rain
19%
Precipitation
27 mm (1.1 in)
Rainy days
6 days
Humidity
73%
Windspeed
4 m/s (8 knots)
Sunshine
295 hours
Percentage Sunshine
73%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Porto typically stay consistent throughout August, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows around 15°C (59°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Porto in August
Browse day-by-day weather records for Porto spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Porto historical weather extremes in August
The extremes listed below come from historical weather data collected in Porto from 1976 through 2025.
- The warmest day in August was on August 7, 2016, with a maximum of 38°C (100°F).
- On August 14, 2016, Porto saw its coldest August day with temperatures maxing out at 18°C (64°F).
- Nighttime temperatures dropped to 7°C (45°F) on August 26, 1985, marking the coldest August night on record.
Best Places in Portugal in August
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Porto in August
Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. Expect water temperatures of around 18°C (64°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Porto in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Porto's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Porto climate overview or explore weather in Portugal.
