Average sea water temperature in September:
+73.2°F
| Minimum sea water temperature in September: | 79.5°F |
| Maximum sea water temperature in September: | 66.2°F |
Daily sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 74.2°F. The highest and lowest sea temperatures during the month were 78.8°F and 66.2°F.
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| Dewey Beach |
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| Dewey Beach |
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| Dewey Beach |
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| Dewey Beach |
Monthly sea water temperature in Dewey Beach, °F
Which USA resorts have warmest sea in September?
| Place name | September 2026 | September 2025 |
|---|---|---|
| Key West | 87.8°F | 86.9°F |
| Key Largo | 87.2°F | 86.6°F |
| Naples | 87.0°F | 86.1°F |
| Houston | 86.9°F | 84.9°F |
| Siesta Key | 86.9°F | 84.9°F |
| Corpus Christi | 86.8°F | 85.8°F |
| Sarasota | 86.8°F | 84.8°F |
| West Palm Beach | 86.6°F | 86.2°F |
| Fort Lauderdale | 86.6°F | 86.4°F |
| New Orleans | 86.4°F | 84.3°F |
| Orange Beach | 86.0°F | 84.0°F |
| Pensacola Beach | 85.9°F | 83.9°F |
| Tampa | 85.9°F | 84.3°F |
| Clearwater Beach | 85.9°F | 84.0°F |
| Miami Beach | 85.8°F | 86.1°F |
| Panama City Beach | 85.8°F | 83.4°F |
| Fort Walton Beach | 85.7°F | 83.3°F |
| Pensacola | 85.7°F | 83.9°F |
| Destin | 85.6°F | 83.1°F |
| Santa Rosa Beach | 85.5°F | 83.4°F |
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: 09:56
September 30, wednesday
1200
68°F
S
3 mph
3 mph
1500
68°F
NW
8 mph
8 mph
1800
68°F
N
12 mph
12 mph
2100
66°F
N
12 mph
12 mph
October 01, thursday
0000
66°F
N
10 mph
10 mph
0300
66°F
NE
9 mph
9 mph
0600
66°F
N
9 mph
9 mph
0900
66°F
N
11 mph
11 mph
