The highest day temperature in August 2025 was 88°F. The lowest night temperature was 59°F. The average values for day and night temperatures during August were 77.9°F и 66.5°F respectivly.

The average sea surface temperature in August 2025 for Westerly was 71.5°F. The maximum and minimum values were 69.8°F and 74.0°F respectively.

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

Precipitation total in August for Westerly is 1.0 in. It makes august one of the least rainy months of the year.

The average wind speed in August is 7.3 mph. It makes August one of the most windless months of the year for Westerly.

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 Westerly in August is 7.8 hours.