The highest day temperature in September 2025 was 89°F. The lowest night temperature was 75°F. The average values for day and night temperatures during September were 85.6°F и 78.1°F respectivly.

The average sea surface temperature in September 2025 for Colva was 85.1°F. The maximum and minimum values were 84.0°F and 85.8°F respectively.

Most of the days in September are gloomy but you can also expect sunny days.

Precipitation total in September for Colva is 10.1 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 6.5 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 Colva in September is 5.4 hours.