Dewey Beach Weather: August
 |
Average Day Temperature: | 81.5°F |
|
Average Night Temperature: | 74.8°F |
|
Sea Water Temperature: | 77.7°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 13.1 - 14.1 hours | |
|
Number of Rainy Days: | 4 days |
| Precipitation Totals: | 1.4 in | |
| detailed information | ||
forecast
| Dewey Beach |
Temperature
| Dewey Beach |
Air Temperature in August, °F
The highest day temperature in August 2025 was 91°F. The lowest night temperature was 64°F. The average values for day and night temperatures during August were 79.7°F и 72.8°F respectivly.
Dewey Beach Water Sea Temperature in August, °F
The average sea surface temperature in August 2025 for Dewey Beach was 79.4°F. The maximum and minimum values were 76.8°F and 85.8°F respectively.
You can expect various weather conditions during August. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in August, in
Precipitation total in August for Dewey Beach is 1.4 in. It makes august one of the most rainy months of the year.
The average wind speed in August is 9.2 mph. It makes August one of the most windless months of the year for Dewey Beach.
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 Dewey Beach in August is 7.8 hours.
Dewey Beach on the Weather Map
| Chicago |  |
-2 |
| Hawaii | |
+78 |
| Honolulu | |
+78 |
| Houston | |
+44 |
| Las Vegas |  |
+40 |
| Los Angeles | |
+52 |
| Maui | |
+72 |
| Miami | |
+72 |
| Miami Beach |  |
+80 |
| New York | |
+20 |
| San Diego | |
+54 |
| San Francisco | |
+46 |
| Sarasota | |
+62 |
| Tampa | |
+62 |
| Washington | |
+28 |
| 0600 |  |
34°F | SW 9 mph |
| 0900 | |
30°F | SW 7 mph |
| 1200 | |
32°F | SW 9 mph |
| 1500 | |
36°F | S 6 mph |
| 1800 | |
38°F | S 8 mph |
| 2100 | |
36°F | S 9 mph |
| 0000 | |
36°F | S 11 mph |
| 0300 | |
36°F | S 10 mph |