Month guide · Sesimbra, Portugal
Sesimbra in August: weather and what to expect
August is the warmest month of the year in Sesimbra. August highs in Sesimbra are now 0.8°C warmer than in 1991-2000. In August, Sesimbra averages highs of 25°C and lows of 19°C, with about 1 rainy day and 5 mm of rain. Our rules rate it good for beach days, walking and cycling. Crowds in the Lisbon area are at their peak.
Is August a good time to visit?
Good for
- Beach daysHighs of 25°C and about 1 rainy day
- Walking and cyclingHighs of 25°C with about 1 rainy day
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. A day above 30°C happens in roughly 1 August in 3.
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 Sesimbra |
|---|---|---|---|
| Coruche, Oeste e Vale do Tejo | 32°C | 2 | 76 km |
| Vendas Novas, Alentejo | 32°C | 2 | 62 km |
| Marinhais, Oeste e Vale do Tejo | 31°C | 2 | 75 km |
| Benavente, Oeste e Vale do Tejo | 31°C | 2 | 65 km |
| Salvaterra de Magos, Oeste e Vale do Tejo | 31°C | 2 | 70 km |
The nearest towns with a warmer August. Distances are in a straight line.
How August is changing
Town-level · ERA5-LandAugust highs are 0.8°C warmer than in 1991-2000, and August rainfall is down about 65% (2016-2025 against 1991-2000). Days above 30°C in August went from 0.8 to 1.2 a year on average.
Questions about Sesimbra in August
Is August a good time to visit Sesimbra?
Our rules rate August good for beach days (highs of 25°C and about 1 rainy day); walking and cycling (highs of 25°C with about 1 rainy day).
How warm is Sesimbra in August?
Average highs are 25°C and lows 19°C. July averages 25°C and September 24°C.
Does it rain much in Sesimbra in August?
About 1 day has at least 1 mm of rain, with 5 mm in total over the month.
Is Sesimbra 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 Sesimbra 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