Average sea water temperature in May:
+42.6°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 41.1°F. The highest and lowest sea temperatures during the month were 46.9°F and 36.7°F.
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| Mackinac Island |
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| Mackinac Island |
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| Mackinac Island |
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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 |
|---|---|---|
| Key West | 84.3°F | 83.5°F |
| Miami | 83.3°F | 82.6°F |
| Naples | 82.9°F | 83.5°F |
| Miami Beach | 82.7°F | 82.4°F |
| St. Petersburg | 82.0°F | 82.6°F |
| Tampa | 81.9°F | 82.7°F |
| West Palm Beach | 81.7°F | 81.1°F |
| Fort Lauderdale | 81.7°F | 81.1°F |
| Clearwater Beach | 81.5°F | 82.6°F |
| Sarasota | 81.5°F | 82.7°F |
| Siesta Key | 81.3°F | 82.5°F |
| Corpus Christi | 79.5°F | 80.9°F |
| Kailua Kona | 79.4°F | 79.1°F |
| South Padre Island | 79.1°F | 80.0°F |
| Orlando | 78.4°F | 77.2°F |
| Houston | 78.4°F | 79.5°F |
| Daytona Beach | 78.1°F | 76.0°F |
| New Orleans | 78.0°F | 79.5°F |
| Honolulu | 78.0°F | 78.1°F |
| Hawaii | 77.9°F | 78.0°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: 16:45
July 21, tuesday
1800
59°F
SE
24 mph
24 mph
2100
57°F
SE
22 mph
22 mph
July 22, wednesday
0000
55°F
SE
21 mph
21 mph
0300
55°F
SE
20 mph
20 mph
0600
55°F
SE
19 mph
19 mph
0900
59°F
SE
19 mph
19 mph
1200
66°F
SE
21 mph
21 mph
1500
68°F
SE
20 mph
20 mph
