Porto weather in August
August in Porto: warm, dry, with clean air — an excellent time to visit.
#4 of 12 months in Porto · #119 of 604 destinations to visit in August · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Porto climate normals — August
| Daytime high | 26°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 17°C / 63°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 15 mm / 0.6 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 17°C / 62°F | |
| Sunshine | 12.2 h/day | |
| Daylight | 13.8 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Porto in August — FAQ
- Is August a good time to visit Porto?
- August in Porto: warm, dry, with clean air — an excellent time to visit. It ranks #4 of 12 months for Porto on SeasonMap's comfort score (88/100).
- What is the weather like in Porto in August?
- In August, Porto averages a daily high of 25.8°C and a low of 17.1°C, with about 14.9 mm of rain over roughly 2.8 rainy days.
- What is the air quality in Porto in August?
- Porto has a mean US Air Quality Index of about 41 in August.