The highest day temperature in March 2026 was 53°F. The lowest night temperature was 20°F. The average values for day and night temperatures during March were 41.8°F и 35.5°F respectivly.

The average sea surface temperature in March 2026 for Block Island was 36.2°F. The maximum and minimum values were 33.6°F and 38.0°F respectively.

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

Precipitation total in March for Block Island is 1.4 in. It makes march one of the most rainy months of the year.

The average wind speed in March is 15.4 mph. It makes March one of the most windy months of the year for Block Island.

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 Block Island in March is 6.3 hours.