The highest day temperature in April 2025 was 76°F. The lowest night temperature was 44°F. The average values for day and night temperatures during April were 63.7°F и 51.4°F respectivly.

The average sea surface temperature in April 2025 for San Sebastian was 58.0°F. The maximum and minimum values were 56.2°F and 59.4°F respectively.

You can expect various weather conditions during April. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in April for San Sebastian is 2.9 in.

The average wind speed in April is 7.6 mph.

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 April is 7.2 hours.