Average sea water temperature in August:
+67.3°F
| Minimum sea water temperature in August: | 73.2°F |
| Maximum sea water temperature in August: | 59.9°F |
Daily sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 69.4°F. The highest and lowest sea temperatures during the month were 72.3°F and 65.3°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 August?
| Place name | August 2025 | August 2024 |
|---|---|---|
| Everglades | 88.8°F | 87.0°F |
| Key West | 88.8°F | 87.8°F |
| Cape Coral | 88.7°F | 86.8°F |
| Key Largo | 88.7°F | 87.3°F |
| Marco Island | 88.7°F | 87.1°F |
| Naples | 88.7°F | 87.0°F |
| St. Petersburg | 88.7°F | 86.9°F |
| Tampa | 88.6°F | 86.4°F |
| Sarasota | 88.6°F | 87.2°F |
| Siesta Key | 88.6°F | 87.3°F |
| Clearwater Beach | 88.5°F | 87.0°F |
| Miami | 88.1°F | 86.4°F |
| Miami Beach | 87.9°F | 86.5°F |
| Galveston | 87.9°F | 88.3°F |
| Houston | 87.8°F | 88.0°F |
| New Orleans | 87.4°F | 88.1°F |
| Fort Lauderdale | 87.2°F | 85.8°F |
| Corpus Christi | 87.0°F | 87.9°F |
| West Palm Beach | 86.8°F | 86.2°F |
| Cocoa Beach | 86.8°F | 84.5°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: 09:41
April 29, wednesday
1200
41°F
SE
9 mph
9 mph
1500
43°F
E
12 mph
12 mph
1800
45°F
SE
13 mph
13 mph
2100
39°F
SE
12 mph
12 mph
April 30, thursday
0000
34°F
SE
11 mph
11 mph
0300
34°F
SE
11 mph
11 mph
0600
34°F
SE
11 mph
11 mph
0900
37°F
SE
9 mph
9 mph
