Sea Temperature in Barcelona in September

© Marta Álvarez

Complete information on the sea temperature range in the Balearic Sea in Barcelona in September. Historical daily data. Climate details for September. Tips on swimming conditions and beach relaxation in Barcelona. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Barcelona Climate and Swimming Opportunities in September

Barcelona lies within the Catalonia in Spain. The average daytime temperature in Barcelona in September is 25°C (77°F), while the nighttime average is 18°C (65°F). There are typically seven rainy days during the month, with a total precipitation of 72 mm (2.8 inches). The daylight duration in September in Barcelona is 12 hours, with an average of 7 hours of sunshine per day. The average wind speed in September is 12 km/h (7 mph), and the humidity level is around 74%.

The water temperature in Barcelona in September ranges from 23°C to 26°C (73°F to 79°F). At the beginning of the month, the average temperature is around 25°C (77°F), shifting to 25°C (77°F) by mid-September and reaching 24°C (75°F) in the last ten days. Overall, the average sea temperature in Barcelona for September is 25°C (77°F). Optimal swimming conditions. The water is warm, and the air is comfortable for drying off and sunbathing.

Frequently Asked Questions About Water Temperatures in September in Barcelona