Average sea water temperature in December:
+45.0°F
| Minimum sea water temperature in December: | 50.7°F |
| Maximum sea water temperature in December: | 38.8°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 44.6°F. The highest and lowest sea temperatures during the month were 48.2°F and 41.7°F.
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Monthly sea water temperature in Nantucket, °F
Which USA resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Kailua Kona | 79.4°F | 78.3°F |
| Fort Lauderdale | 79.2°F | 77.6°F |
| Honolulu | 78.8°F | 78.3°F |
| Hawaii | 78.7°F | 78.3°F |
| Kauai | 78.7°F | 76.0°F |
| Maui | 78.2°F | 77.8°F |
| Miami Beach | 78.0°F | 75.9°F |
| Islamorada | 77.6°F | 73.4°F |
| Key Largo | 77.5°F | 73.1°F |
| Oahu | 77.5°F | 77.2°F |
| Key West | 77.0°F | 72.6°F |
| Miami | 76.4°F | 73.0°F |
| Everglades | 75.1°F | 69.7°F |
| South Padre Island | 72.3°F | 71.9°F |
| Naples | 72.2°F | 67.7°F |
| Cape Coral | 72.2°F | 67.8°F |
| Sanibel Island | 71.7°F | 67.1°F |
| Siesta Key | 70.2°F | 65.6°F |
| Sarasota | 70.1°F | 65.6°F |
| Cocoa Beach | 70.0°F | 66.6°F |
Best time for vacation in Nantucket
Nantucket on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Nantucket
Local time: 15:35
December 16, tuesday
1800
37°F
E
17 mph
17 mph
2100
39°F
NE
18 mph
18 mph
December 17, wednesday
0000
39°F
NE
22 mph
22 mph
0300
41°F
NE
25 mph
25 mph
0600
41°F
NE
25 mph
25 mph
0900
43°F
NE
28 mph
28 mph
1200
45°F
NE
29 mph
29 mph
1500
45°F
NE
33 mph
33 mph
