The highest day temperature in September 2023 was 89°F. The lowest night temperature was 62°F. The average values for day and night temperatures during September were 77.0°F и 70.5°F respectivly.

The average sea surface temperature in September 2023 for Bethany Beach was 76.2°F. The maximum and minimum values were 70.6°F and 80.4°F respectively.

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

Precipitation total in September for Bethany Beach is 1.4 in.

The average wind speed in September is 10.9 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 Bethany Beach in September is 7.7 hours.