Average sea water temperature in May:
+42.5°F
| Minimum sea water temperature in May: | 52.5°F |
| Maximum sea water temperature in May: | 36.1°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 40.9°F. The highest and lowest sea temperatures during the month were 46.8°F and 36.7°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 May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Everglades | 84.5°F | 84.5°F |
| Key West | 84.2°F | 83.5°F |
| Key Largo | 84.0°F | 83.5°F |
| Miami | 83.3°F | 82.6°F |
| Cape Coral | 83.2°F | 83.4°F |
| Marco Island | 83.1°F | 83.5°F |
| Hialeah | 82.9°F | 82.3°F |
| Naples | 82.8°F | 83.5°F |
| Miami Beach | 82.6°F | 82.4°F |
| St. Petersburg | 81.9°F | 82.6°F |
| Tampa | 81.8°F | 82.7°F |
| West Palm Beach | 81.6°F | 81.1°F |
| Fort Lauderdale | 81.6°F | 81.1°F |
| Sarasota | 81.4°F | 82.7°F |
| Clearwater Beach | 81.4°F | 82.6°F |
| Siesta Key | 81.2°F | 82.5°F |
| Cocoa Beach | 80.3°F | 79.4°F |
| Corpus Christi | 79.4°F | 80.9°F |
| Orlando | 78.3°F | 77.2°F |
| Galveston | 78.3°F | 79.6°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: 01:58
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
