Average sea water temperature in December:
+39.6°F
| Minimum sea water temperature in December: | 45.3°F |
| Maximum sea water temperature in December: | 35.4°F |
Daily sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 38.0°F. The highest and lowest sea temperatures during the month were 42.4°F and 35.4°F.
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| Mackinac Island |
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| Mackinac Island |
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| Mackinac Island |
14 days
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| Mackinac Island |
Monthly sea water temperature in Mackinac Island, °F
Which USA resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Kailua Kona | 79.2°F | 78.3°F |
| West Palm Beach | 79.0°F | 78.4°F |
| Fort Lauderdale | 78.7°F | 77.6°F |
| Honolulu | 78.6°F | 78.3°F |
| Hawaii | 78.5°F | 78.3°F |
| Kauai | 78.2°F | 76.0°F |
| Maui | 78.0°F | 77.8°F |
| Miami Beach | 77.4°F | 75.9°F |
| Oahu | 77.1°F | 77.2°F |
| Key Largo | 76.3°F | 73.1°F |
| Hialeah | 76.2°F | 74.3°F |
| Key West | 75.9°F | 72.6°F |
| Miami | 75.5°F | 73.0°F |
| Everglades | 73.7°F | 69.7°F |
| Marco Island | 71.8°F | 68.0°F |
| Naples | 71.5°F | 67.7°F |
| Cape Coral | 71.2°F | 67.8°F |
| Cocoa Beach | 69.7°F | 66.6°F |
| Siesta Key | 69.3°F | 65.6°F |
| Sarasota | 69.2°F | 65.6°F |
Best time for vacation in Mackinac Island
Mackinac Island on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Mackinac Island
Local time: 07:23
April 09, thursday
0900
39°F
E
17 mph
17 mph
1200
37°F
E
16 mph
16 mph
1500
37°F
E
15 mph
15 mph
1800
36°F
E
9 mph
9 mph
2100
34°F
E
5 mph
5 mph
April 10, friday
0000
36°F
SE
2 mph
2 mph
0300
32°F
E
2 mph
2 mph
0600
30°F
NE
2 mph
2 mph
