Average sea water temperature in January:
+41.9°F
| Minimum sea water temperature in January: | 47.1°F |
| Maximum sea water temperature in January: | 34.2°F |
Daily sea water temperature in January, °F
Show year:
2026
2025
2024
The average sea water temperature in January of 2026 was 39.2°F. The highest and lowest sea temperatures during the month were 42.1°F and 34.7°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 January?
| Place name | January 2026 | January 2025 |
|---|---|---|
| Kailua Kona | 78.3°F | 78.2°F |
| Honolulu | 77.2°F | 77.6°F |
| Hawaii | 77.2°F | 77.5°F |
| Maui | 77.0°F | 76.9°F |
| Kauai | 77.0°F | 75.0°F |
| West Palm Beach | 76.6°F | 75.5°F |
| Oahu | 76.1°F | 76.5°F |
| Fort Lauderdale | 75.9°F | 75.1°F |
| Miami Beach | 74.0°F | 73.1°F |
| Key West | 72.5°F | 70.3°F |
| Miami | 71.2°F | 70.7°F |
| Everglades | 70.8°F | 68.6°F |
| South Padre Island | 69.5°F | 66.7°F |
| Naples | 67.7°F | 64.7°F |
| Cape Coral | 67.3°F | 64.3°F |
| Cocoa Beach | 66.9°F | 60.9°F |
| Siesta Key | 65.0°F | 61.5°F |
| Sarasota | 65.0°F | 61.2°F |
| Orlando | 64.8°F | 59.8°F |
| Tampa | 64.3°F | 60.4°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: 01:52
March 19, thursday
0300
36°F
NW
7 mph
7 mph
0600
37°F
NW
4 mph
4 mph
0900
39°F
NW
7 mph
7 mph
1200
45°F
NW
7 mph
7 mph
1500
45°F
NW
12 mph
12 mph
1800
45°F
N
12 mph
12 mph
2100
41°F
N
10 mph
10 mph
March 20, friday
0000
39°F
N
9 mph
9 mph
