Month guide · Castro Marim, Portugal
Castro Marim in July: weather and what to expect
In July, Castro Marim averages highs of 33°C and lows of 20°C, with almost no rainy days and 1 mm of rain. Highs are 4°C warmer than in June and about the same as in August. Our rules rate it good for beach days. Crowds in the Algarve are at their peak.
Is July a good time to visit?
Good for
- Beach daysHighs of 33°C and almost no rainy days
Not ideal for
- Outdoor activity at middayAverage highs of 33°C
Daily highs through July
Town-level · ERA5-Land 1991-2020Highs climb about 2°C over the month.
July in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in July 2027
No national or regional public holidays.
Local (municipal) holidays are not included.
Warmer in July
Where is warm in July →| Place | High | Rain days | From Castro Marim |
|---|---|---|---|
| Mértola, Alentejo | 34°C | 0 | 51 km |
| Minas de São Domingos, Alentejo | 34°C | 0 | 51 km |
| Aldeia Nova, Alentejo | 33°C | 0 | 78 km |
| Serpa, Alentejo | 33°C | 0 | 82 km |
| Cabeça Gorda, Alentejo | 33°C | 0 | 84 km |
The nearest towns with a warmer July. Distances are in a straight line.
How July is changing
Town-level · ERA5-LandJuly highs are 1.2°C warmer than in 1991-2000 (2016-2025 against 1991-2000). Days above 35°C in July went from 6.6 to 10 a year on average.
Questions about Castro Marim in July
Is July a good time to visit Castro Marim?
Our rules rate July good for beach days (highs of 33°C and almost no rainy days). It is less suited to outdoor activity at midday (average highs of 33°C).
How warm is Castro Marim in July?
Average highs are 33°C and lows 20°C. June averages 29°C and August 33°C.
Does it rain much in Castro Marim in July?
Hardly any days have at least 1 mm of rain, with 1 mm in total over the month.
Is Castro Marim busy in July?
In July 2025, nights booked through online platforms in the Algarve were about 90% of the busiest month, which we count as peak. The figure is for the whole region and leaves out hotels.
How long are the days in Castro Marim in July?
About 14 h 30 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