Overview
Porto is in Portugal. The figures below are long-term monthly averages (2010-2023), not a forecast.
- Warmest month: August, with daytime highs around 25°C.
- Coolest month: January, with daytime highs around 13°C.
- Driest month: July, about 13 mm of rain.
- Wettest month: October, about 180 mm of rain.
- Sunniest month: July, about 13.5 hr of sunshine per day.
- Warmest sea: September, around 18°C.
Climate by month
| Month | Day high | Night low | Sea | Rain (mm) | Rainy days | Sun (h/day) | Humidity | Wind (km/h) |
|---|---|---|---|---|---|---|---|---|
| January | 13°C | 7°C | 13°C | 161 mm | 13 | 6.5 | 81% | 13 km/h |
| February | 14°C | 7°C | 13°C | 126 mm | 10 | 8.0 | 78% | 14 km/h |
| March | 16°C | 8°C | 13°C | 138 mm | 13 | 9.2 | 77% | 13 km/h |
| April | 18°C | 10°C | 14°C | 122 mm | 12 | 10.8 | 78% | 12 km/h |
| May | 20°C | 13°C | 15°C | 86 mm | 9 | 12.1 | 76% | 12 km/h |
| June | 22°C | 15°C | 17°C | 43 mm | 7 | 13.1 | 78% | 11 km/h |
| July | 25°C | 17°C | 17°C | 13 mm | 3 | 13.5 | 75% | 11 km/h |
| August | 25°C | 17°C | 17°C | 16 mm | 4 | 12.2 | 75% | 11 km/h |
| September | 24°C | 16°C | 18°C | 67 mm | 6 | 10.9 | 76% | 10 km/h |
| October | 21°C | 14°C | 17°C | 180 mm | 12 | 8.4 | 79% | 12 km/h |
| November | 16°C | 10°C | 16°C | 170 mm | 14 | 7.0 | 82% | 13 km/h |
| December | 14°C | 8°C | 14°C | 176 mm | 13 | 6.5 | 82% | 14 km/h |
Similar destinations
Data and sources
- Air climate: Open-Meteo Historical Weather API (ERA5 / ERA5-Land reanalysis), 2010-2023. CC BY 4.0 (Open-Meteo); underlying ERA5 data: Copernicus licence
- Sea temperature: NOAA Coral Reef Watch CoralTemp v3.1 monthly SST (5 km), 2014-2023.
- Last updated October 8, 2026.