Month guide · Cacilhas, Portugal
Cacilhas in August: weather and what to expect
In August, Cacilhas averages highs of 26°C and lows of 19°C, with about 2 rainy days and 6 mm of rain. Highs are 1°C warmer than in July and 2°C warmer than in September. Crowds in the Lisbon area are at their peak. These are regional figures for the wider area.
Is August a good time to visit?
Good for
No verdicts for Cacilhas 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 stay about the same through the month.
August in detail
Regional · 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 Cacilhas |
|---|---|---|---|
| Coruche, Oeste e Vale do Tejo | 32°C | 2 | 62 km |
| Vendas Novas, Alentejo | 32°C | 2 | 60 km |
| Marinhais, Oeste e Vale do Tejo | 31°C | 2 | 56 km |
| Benavente, Oeste e Vale do Tejo | 31°C | 2 | 44 km |
| Salvaterra de Magos, Oeste e Vale do Tejo | 31°C | 2 | 49 km |
The nearest towns with a warmer August. Distances are in a straight line.
How August is changing
Regional · ERA5-LandAugust highs are 0.8°C warmer than in 1991-2000, and August rainfall is down about 80% (2016-2025 against 1991-2000). Days above 30°C in August went from 3.7 to 3.9 a year on average.
Questions about Cacilhas in August
How warm is Cacilhas in August?
Average highs are 26°C and lows 19°C. July averages 26°C and September 25°C. These are regional figures for the wider area.
Does it rain much in Cacilhas in August?
About 2 days have at least 1 mm of rain, with 6 mm in total over the month. These are regional figures for the wider area.
Is Cacilhas busy in August?
In August 2025, nights booked through online platforms in the Lisbon area 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 Cacilhas in August?
About 13 h 43 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