The highest day temperature in March 2025 was 73°F. The lowest night temperature was 24°F. The average values for day and night temperatures during March were 54.5°F и 42.7°F respectivly.

The average sea surface temperature in March 2025 for Dewey Beach was 43.9°F. The maximum and minimum values were 38.8°F and 49.0°F respectively.

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

Precipitation total in March for Dewey Beach is 1.2 in. It makes march one of the most rainy months of the year.

The average wind speed in March is 13.3 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 6.6 hours.