Month guide · Nisa, Portugal
Nisa in August: weather and what to expect
In August, Nisa averages highs of 32°C and lows of 18°C, with about 2 rainy days and 10 mm of rain. Highs are about the same as in July and 5°C warmer than in September. Crowds in the Alentejo are at their peak.
Is August a good time to visit?
Good for
No verdicts for Nisa 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
Town-level · ERA5-Land 1991-2020Highs fall about 2°C over the month. A day above 40°C happens in roughly 1 August in 6.
August in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in August 2027
- 15 Aug Assumption Day
Local (municipal) holidays are not included.
Warmer in August
Where is warm in August →| Place | High | Rain days | From Nisa |
|---|---|---|---|
| Ponte de Sôr, Alentejo | 33°C | 2 | 43 km |
| Arronches, Alentejo | 33°C | 2 | 54 km |
| Vila Velha de Ródão, Centro | 32°C | 2 | 16 km |
| Pego, Oeste e Vale do Tejo | 32°C | 2 | 43 km |
| Fronteira, Alentejo | 32°C | 2 | 51 km |
The nearest towns with a warmer August. Distances are in a straight line.
How August is changing
Town-level · ERA5-LandAugust highs are 2.5°C warmer than in 1991-2000, and August rainfall is down about 70% (2016-2025 against 1991-2000). Days above 35°C in August went from 6.4 to 12 a year on average.
Questions about Nisa in August
How warm is Nisa in August?
Average highs are 32°C and lows 18°C. July averages 32°C and September 27°C.
Does it rain much in Nisa in August?
About 2 days have at least 1 mm of rain, with 10 mm in total over the month.
Is Nisa busy in August?
In August 2025, nights booked through online platforms in the Alentejo 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 Nisa in August?
About 13 h 46 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