09.09
wed
wed
Day
79°F
N 12 mph
Precip.
15%
15%
Night
75°F
NE 24 mph
Precip.
8%
8%
10.09
thu
thu
Day
81°F
E 11 mph
Precip.
15%
15%
Night
77°F
SE 7 mph
Precip.
72%
72%
11.09
fri
fri
Day
75°F
SW 11 mph
Precip.
14%
14%
Night
75°F
E 2 mph
Precip.
5%
5%
12.09
sat
sat
Day
73°F
N 13 mph
Precip.
52%
52%
Night
77°F
NW 19 mph
Precip.
55%
55%
13.09
sun
sun
Day
79°F
N 11 mph
Precip.
43%
43%
Night
75°F
SE 4 mph
Precip.
29%
29%
14.09
mon
mon
Day
77°F
SW 7 mph
Precip.
24%
24%
Night
77°F
NW 7 mph
Precip.
25%
25%
15.09
tue
tue
Day
77°F
NW 8 mph
Precip.
23%
23%
Night
77°F
N 11 mph
Precip.
19%
19%
sea water
temperature
temperature
| Dewey Beach |
monthly
weather
weather
| Dewey Beach |
current
weather
weather
| Dewey Beach |
14 days
forecast
forecast
| Dewey Beach |
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 72.6°F. The highest and lowest sea temperatures during the month were 74.8°F and 70.9°F.
Air temperature in Dewey Beach, °F
Precipitation total in Dewey Beach, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Dewey Beach
Dewey Beach on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Dewey Beach
Local time: 18:53
September 09, wednesday
2100
75°F
N
24 mph
24 mph
September 10, thursday
0000
75°F
NE
24 mph
24 mph
0300
75°F
NE
22 mph
22 mph
0600
75°F
NE
22 mph
22 mph
0900
77°F
NE
19 mph
19 mph
1200
81°F
E
11 mph
11 mph
1500
81°F
SE
9 mph
9 mph
1800
79°F
SW
6 mph
6 mph
