The highest day temperature in August 2025 was 93°F. The lowest night temperature was 75°F. The average values for day and night temperatures during August were 88.4°F и 76.5°F respectivly.

The average sea surface temperature in August 2025 for Barcelona was 85.3°F. The maximum and minimum values were 83.2°F and 86.8°F respectively.

Most of the days in August are cloudy but you can also expect sunny or gloomy days.

Precipitation total in August for Barcelona is 2.3 in. It makes august the most rainy month of the year.

The average wind speed in August is 5.7 mph. It makes August one of the most windless months of the year for Barcelona.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Barcelona in August is 6.1 hours.