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 Nantucket was 38.9°F. The maximum and minimum values were 34.6°F and 43.0°F respectively.

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

Precipitation total in March for Nantucket 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 Nantucket.

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 Nantucket in March is 5.7 hours.