Month guide · Alcácer do Sal, Portugal
Alcácer do Sal in August: weather and what to expect
In August, Alcácer do Sal averages highs of 30°C and lows of 18°C, with about 1 rainy day and 5 mm of rain. Highs are about the same as in July and 3°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 Alcácer do Sal 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 1°C over the month.
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 Alcácer do Sal |
|---|---|---|---|
| Ferreira do Alentejo, Alentejo | 32°C | 1 | 49 km |
| Montemor-o-Novo, Alentejo | 32°C | 2 | 40 km |
| Alvito, Alentejo | 32°C | 1 | 47 km |
| Vendas Novas, Alentejo | 32°C | 2 | 34 km |
| Ermidas, Alentejo | 32°C | 1 | 43 km |
The nearest towns with a warmer August. Distances are in a straight line.
How August is changing
Town-level · ERA5-LandAugust highs are 2.2°C warmer than in 1991-2000, and August rainfall is down about 80% (2016-2025 against 1991-2000). Days above 35°C in August went from 2.8 to 4.3 a year on average.
Questions about Alcácer do Sal in August
How warm is Alcácer do Sal in August?
Average highs are 30°C and lows 18°C. July averages 30°C and September 27°C.
Does it rain much in Alcácer do Sal in August?
About 1 day has at least 1 mm of rain, with 5 mm in total over the month.
Is Alcácer do Sal 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 Alcácer do Sal in August?
About 13 h 42 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