Block Island Weather: August
 |
Average Day Temperature: | 76.1°F |
|
Average Night Temperature: | 72.4°F |
|
Sea Water Temperature: | 72.3°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 13.1 - 14.3 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.0 in | |
| detailed information | ||
forecast
| Block Island |
Temperature
| Block Island |
Air Temperature in August, °F
The highest day temperature in August 2025 was 80°F. The lowest night temperature was 64°F. The average values for day and night temperatures during August were 72.6°F и 69.6°F respectivly.
Block Island Water Sea Temperature in August, °F
The average sea surface temperature in August 2025 for Block Island was 71.1°F. The maximum and minimum values were 68.8°F and 73.4°F respectively.
Most of the days in August are cloudy but you can also expect sunny or gloomy days.
Precipitation Totals in August, in
Precipitation total in August for Block Island is 1.0 in. It makes august one of the least rainy months of the year.
The average wind speed in August is 11.1 mph. It makes August one of the most windless 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 August is 8.3 hours.
Block Island on the Weather Map
| Chicago |  |
+42 |
| Hawaii |  |
+74 |
| Honolulu | |
+74 |
| Houston |  |
+74 |
| Las Vegas |  |
+36 |
| Los Angeles | |
+42 |
| Maui | |
+68 |
| Miami | |
+76 |
| Miami Beach | |
+78 |
| New York | |
+38 |
| San Diego | |
+46 |
| San Francisco | |
+42 |
| Sarasota | |
+68 |
| Tampa | |
+68 |
| Washington |  |
+36 |
| 1200 |  |
46°F | N 14 mph |
| 1500 |  |
46°F | N 13 mph |
| 1800 |  |
44°F | N 17 mph |
| 2100 | |
44°F | N 22 mph |
| 0000 |  |
44°F | NE 22 mph |
| 0300 | |
44°F | E 14 mph |
| 0600 | |
42°F | SE 10 mph |
| 0900 | |
40°F | SW 11 mph |