The highest day temperature in September 2026 was 71°F. The lowest night temperature was 52°F. The average values for day and night temperatures during September were 61.7°F и 56.0°F respectivly.

The average sea surface temperature in September 2026 for Seaside was 58.8°F. The maximum and minimum values were 54.2°F and 62.4°F respectively.

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

Precipitation total in September for Seaside is 1.1 in.

The average wind speed in September is 6.7 mph. It makes September one of the most windless months of the year for Seaside.

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 Seaside in September is 6.5 hours.