Month guide · Bilbao, Spain
Bilbao in August: weather and what to expect
In August, Bilbao averages highs of 23°C and lows of 18°C, with about 13 rainy days and 65 mm of rain. Highs are 1°C warmer than in July and 2°C warmer than in September. Crowds in Basque Country are at their peak. These are regional figures for the wider area.
Is August a good time to visit?
Good for
No verdicts for Bilbao in August yet. They only use climate values that are precise enough to judge with.
Not ideal for
Nothing stands out as a weaker fit.
Daily highs through August
Regional · ERA5-Land 1991-2020Highs fall about 1°C over the month. A day above 30°C happens in roughly 1 August in 2.
August in detail
Regional · ERA5-LandCrowds, holidays and daylight
Public holidays in August 2027
No national or regional public holidays.
Local (municipal) holidays are not included.
Warmer in August
Where is warm in August →| Place | High | Rain days | From Bilbao |
|---|---|---|---|
| Guarromán, Andalusia | 35°C | 1 | 568 km |
| Arquillos, Andalusia | 35°C | 2 | 567 km |
| Bailén, Andalusia | 35°C | 1 | 579 km |
| Baños de la Encina, Andalusia | 35°C | 1 | 570 km |
| Linares, Andalusia | 35°C | 1 | 578 km |
The nearest towns with a warmer August. Distances are in a straight line.
How August is changing
Regional · ERA5-LandAugust highs are 0.7°C warmer than in 1991-2000, and August rainfall is down about 15% (2016-2025 against 1991-2000). Days above 25°C in August went from 7.0 to 9.5 a year on average.
Questions about Bilbao in August
How warm is Bilbao in August?
Average highs are 23°C and lows 18°C. July averages 22°C and September 22°C. These are regional figures for the wider area.
Does it rain much in Bilbao in August?
About 13 days have at least 1 mm of rain, with 65 mm in total over the month. These are regional figures for the wider area.
Is Bilbao busy in August?
In August 2025, nights booked through online platforms in Basque Country were the busiest month of the year, which we count as peak. The figure is for the whole region and leaves out hotels.
How long are the days in Bilbao in August?
About 14 h 01 min from sunrise to sunset in the middle of the month.
Sources
Climate: ERA5-Land, Copernicus Climate Change Service (C3S) Climate Data Store, contains modified Copernicus information (CC BY 4.0). Crowds: Eurostat, nights spent in short-stay accommodation booked through online platforms (tour_ce_omn12) (CC BY 4.0). Place names and populations: GeoNames (CC BY 4.0). Climate averages cover 1991-2020. Daylight: calculated from the town's coordinates. Full methodology