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 |
|---|---|---|
| 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 |
| Tampa | 68.3°F | 65.5°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: 01:59
May 31, sunday
0300
50°F
N
4 mph
4 mph
0600
50°F
E
3 mph
3 mph
0900
54°F
E
4 mph
4 mph
1200
57°F
E
8 mph
8 mph
1500
59°F
E
11 mph
11 mph
1800
59°F
E
9 mph
9 mph
2100
54°F
E
9 mph
9 mph
June 01, monday
0000
50°F
SE
6 mph
6 mph
