The highest day temperature in August 2026 was 88°F. The lowest night temperature was 66°F. The average values for day and night temperatures during August were 79.0°F и 71.9°F respectivly.

The average sea surface temperature in August 2026 for Siasconset was 71.7°F. The maximum and minimum values were 67.0°F and 75.0°F respectively.

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

Precipitation total in August for Siasconset is 1.4 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 13.1 mph. It makes August the most windless month of the year for Siasconset.

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 Siasconset in August is 8.2 hours.