Bethany Beach Weather: September
 |
Average Day Temperature: | 76.3°F |
|
Average Night Temperature: | 70.4°F |
|
Sea Water Temperature: | 75.8°F |
|
Number of Sunny Days: | 13 days |
| Sunshine Hours: | 11.8 - 13.0 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.0 in | |
| detailed information | ||
forecast
| Bethany Beach |
Temperature
| Bethany Beach |
Air Temperature in September, °F
The highest day temperature in September 2025 was 85°F. The lowest night temperature was 65°F. The average values for day and night temperatures during September were 75.4°F и 70.3°F respectivly.
Bethany Beach Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Bethany Beach was 75.2°F. The maximum and minimum values were 73.8°F and 77.4°F respectively.
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Bethany Beach is 1.0 in.
The average wind speed in September is 11.4 mph. It makes September one of the most windless months of the year for Bethany 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 Bethany Beach in September is 7.3 hours.
Bethany Beach on the Weather Map
| Boston |  |
+94 |
| Chicago | |
+82 |
| Hawaii |  |
+82 |
| Houston | |
+106 |
| Las Vegas | |
+124 |
| Los Angeles | |
+92 |
| Maui | |
+78 |
| Miami | |
+92 |
| Myrtle Beach |  |
+84 |
| New York | |
+84 |
| San Diego | |
+80 |
| San Francisco | |
+62 |
| Santa Monica | |
+80 |
| Sarasota | |
+92 |
| Washington | |
+88 |
| 1800 |  |
84°F | N 14 mph |
| 2100 |  |
78°F | N 14 mph |
| 0000 |  |
78°F | N 13 mph |
| 0300 | |
78°F | NE 9 mph |
| 0600 | |
78°F | NE 8 mph |
| 0900 |  |
80°F | NE 11 mph |
| 1200 | |
84°F | N 13 mph |
| 1500 | |
84°F | N 15 mph |