Castro Marim Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Castro Marim.
Climate overview of Castro Marim
Castro Marim, Algarve, Portugal, sees big temperature differences between seasons, with July peaking at 32°C (90°F) and January dropping to 16°C (61°F).
The city tends toward dry conditions, with around 437 mm (17 in) of rainfall per year. It does, however, have a distinct dry season from May to September, with very warm summers and mild winters. The most sunshine falls in July, with an average of 12.0 hours of daily sunshine.
Castro Marim Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castro Marim - and find the best time to visit.
Monthly Temperature in Castro Marim
Visitors to Castro Marim can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a very warm 32°C (90°F) in July to a moderate 16°C (61°F) in the coolest month, January.
Nights vary from 21°C (70°F) in July to around 9°C (48°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Castro Marim
Castro Marim tends toward drier weather patterns, receiving approximately 437 mm (17 in) of rain per year. The climate in Castro Marim shows significant variation throughout the year. Expect moderate rainfall in December, the wettest month, with an average of 67 mm (2.6 in) of precipitation over 13 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 1 mm (0.04 in) of rainfall over a single rainy day. For more details, please visit our Castro Marim Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Castro Marim
For those who appreciate different seasons, Castro Marim serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.0 hours of sunshine daily, and embrace the darker days in December, offering only 5.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Castro Marim by Month
The relative humidity is high throughout the year in Castro Marim.
The city experiences its highest humidity in January, reaching 77%. In July, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Castro Marim
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: March, April, May, June, September, October and November
- Warmest weather: July and August
- Most sunshine: April, July and August
- Fewest rainy days: July, August and September
- Seasonal pattern: A distinct dry season from May to September, with very warm summers and mild winters
Frequently asked questions about the climate in Castro Marim
What is the best time to visit Castro Marim?
March, April, May, June, September, October and November typically offer the most optimal weather in Castro Marim. In contrast, January, February and December tend to have less optimal conditions. Castro Marim has a distinct dry season from May to September, with very warm summers and mild winters.
What temperatures can I expect in Castro Marim?
Daytime highs range from 16°C (61°F) in January to 32°C (90°F) in July. Nighttime lows range from 9°C (48°F) to 21°C (70°F). Temperatures vary considerably through the year.
How much rain does Castro Marim get?
Annual rainfall is around 437 mm (17 in). December is the wettest month with 67 mm (2.6 in), while July is the driest with 1 mm (0.04 in).
How sunny is Castro Marim?
Castro Marim receives around 3,135 hours of sunshine per year. July is the sunniest month with 361 hours, while December is the cloudiest with just 158 hours. Overall, Castro Marim enjoys abundant sunshine.
Castro Marim 3-Day Forecast
Castro Marim on the map
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