Average sea water temperature in March:
+44.4°F
| Minimum sea water temperature in March: | 50.5°F |
| Maximum sea water temperature in March: | 35.6°F |
Daily sea water temperature in March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 40.9°F. The highest and lowest sea temperatures during the month were 46.2°F and 35.6°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 March?
| Place name | March 2026 | March 2025 |
|---|---|---|
| West Palm Beach | 77.1°F | 75.8°F |
| Key Largo | 76.8°F | 75.1°F |
| Miami Beach | 76.8°F | 75.3°F |
| Honolulu | 76.7°F | 76.8°F |
| Fort Lauderdale | 76.6°F | 75.8°F |
| Hawaii | 76.5°F | 76.7°F |
| Kauai | 76.5°F | 75.0°F |
| Key West | 76.5°F | 74.5°F |
| Miami | 76.0°F | 74.4°F |
| Maui | 75.5°F | 76.0°F |
| Oahu | 74.9°F | 75.7°F |
| Port St. Lucie | 73.8°F | 71.5°F |
| South Padre Island | 72.7°F | 66.8°F |
| Naples | 72.6°F | 71.4°F |
| Corpus Christi | 71.9°F | 67.0°F |
| Tampa | 71.7°F | 69.3°F |
| Cocoa Beach | 71.7°F | 70.0°F |
| Sarasota | 70.6°F | 68.6°F |
| Clearwater Beach | 70.2°F | 67.6°F |
| Siesta Key | 70.1°F | 68.5°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: 09:55
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
