The highest day temperature in July 2026 was 97°F. The lowest night temperature was 60°F. The average values for day and night temperatures during July were 81.7°F и 64.8°F respectivly.

The average sea surface temperature in July 2026 for San Sebastian was 78.7°F. The maximum and minimum values were 77.2°F and 80.2°F respectively.

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

Precipitation total in July for San Sebastian is 1.8 in. It makes july the least rainy month of the year.

The average wind speed in July is 5.7 mph. It makes July the most windless month of the year for San Sebastian.

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 San Sebastian in July is 8.8 hours.