The highest day temperature in March 2026 was 72°F. The lowest night temperature was 31°F. The average values for day and night temperatures during March were 47.6°F и 42.8°F respectivly.

The average sea surface temperature in March 2026 for Dewey Beach was 39.9°F. The maximum and minimum values were 34.0°F and 45.8°F respectively.

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

Precipitation total in March for Dewey Beach is 1.1 in.

The average wind speed in March is 13.4 mph. It makes March the most windy month of the year for Dewey Beach.

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 Dewey Beach in March is 6.8 hours.