The highest day temperature in August 2026 was 90°F. The lowest night temperature was 40°F. The average values for day and night temperatures during August were 78.2°F и 67.8°F respectivly.

The average sea surface temperature in August 2026 for Biarritz was 78.7°F. The maximum and minimum values were 76.8°F and 80.2°F respectively.

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

Precipitation total in August for Biarritz is 1.6 in. It makes august the least rainy month of the year.

The average wind speed in August is 6.9 mph. This value is relatively stable throughout the year.

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 Biarritz in August is 9.1 hours.