The highest day temperature in March 2025 was 46°F. The lowest night temperature was 19°F. The average values for day and night temperatures during March were 41.0°F и 38.5°F respectivly.

The average sea surface temperature in March 2025 for Block Island was 39.9°F. The maximum and minimum values were 38.0°F and 41.6°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 the most rainy month 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 6.2 hours.