The highest day temperature in August 2025 was 94°F. The lowest night temperature was 65°F. The average values for day and night temperatures during August were 84.4°F и 72.3°F respectivly.

The average sea surface temperature in August 2025 for Quarteira was 75.0°F. The maximum and minimum values were 68.2°F and 80.0°F respectively.

Almost all days in August are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in August for Quarteira is 0.1 in. It makes august one of the least rainy months of the year.

The average wind speed in August is 9.0 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 Quarteira in August is 12.8 hours.