The highest day temperature in March 2026 was 54°F. The lowest night temperature was 22°F. The average values for day and night temperatures during March were 42.0°F и 37.3°F respectivly.

The average sea surface temperature in March 2026 for Siasconset was 38.9°F. The maximum and minimum values were 35.8°F and 42.2°F respectively.

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

Precipitation total in March for Siasconset is 1.1 in.

The average wind speed in March is 19.0 mph. It makes March one of the most windy months of the year for Siasconset.

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 Siasconset in March is 5.7 hours.