The highest day temperature in October 2025 was 75°F. The lowest night temperature was 44°F. The average values for day and night temperatures during October were 63.0°F и 56.1°F respectivly.

The average sea surface temperature in October 2025 for Block Island was 66.0°F. The maximum and minimum values were 61.0°F and 70.2°F respectively.

Most of the days in October are sunny but you can also expect cloudy and gloomy days.

Precipitation total in October for Block Island is 1.4 in. It makes october the most rainy month of the year.

The average wind speed in October is 13.8 mph.

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 October is 6.6 hours.