Climate Insights for Barcelos

The climate in Barcelos is temperate. The average annual temperature is 15°C and approximately 1576mm of precipitation falls per year. October is the wettest month, receiving around 220mm of rainfall. Barcelos is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 6°C.

Temperatures in Barcelos vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 27°C and the mean temperature sits around 21°C. January is the coolest month, with minimum temperatures around 6°C and an average of 9°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.

Barcelos is a fairly wet location, receiving approximately 1576mm of precipitation annually, which averages out to around 131mm per month. The wettest month is October, averaging 220mm of rainfall. November and December also tend to see above-average precipitation. The driest month is August, with just 16mm. That's 205mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Barcelos is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently autumn in Barcelos, which began on September 23, 2026. Barcelos is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 27°C, while the coldest stretch bottoms out in January near 6°C. Winter is next, beginning on December 21, 2026 (87 days from now).

The best time to visit Barcelos is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 53mm per month. By contrast, January can be quite cold with temperatures dropping to 6°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Barcelos based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.