The highest day temperature in August 2025 was 87°F. The lowest night temperature was 65°F. The average values for day and night temperatures during August were 79.2°F и 70.3°F respectivly.

The average sea surface temperature in August 2025 for Giresun was 84.1°F. The maximum and minimum values were 81.2°F and 86.6°F respectively.

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

Precipitation total in August for Giresun is 1.2 in. It makes august the least rainy month of the year.

The average wind speed in August is 5.6 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 Giresun in August is 9.6 hours.