Current Sea Water Temperature:
+30.0°F
| Maximum Sea Water Temperature in February: | 33.0°F |
| Minimum Sea Water Temperature in February: | 29.8°F |
| Average water temperature in February: | 31.1°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| February 21 | 30.0°F | February 16 | 30.0°F |
| February 20 | 30.2°F | February 15 | 30.0°F |
| February 19 | 30.2°F | February 14 | 30.0°F |
| February 18 | 30.0°F | February 13 | 30.0°F |
| February 17 | 30.0°F | February 12 | 30.0°F |
When is the Warmest Sea for Mackinac Island?
According to our data for the last three years for Mackinac Island the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Mackinac Island was 71.6°F. The maximum and minimum values were 67.0°F and 74.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Mackinac Island was 67.6°F. The maximum and minimum values were 60.0°F and 73.0°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Mackinac Island was 63.3°F. The maximum and minimum values were 60.4°F and 69.0°F respectively.
USA Resorts:
NAME
F°
| Chicago |  |
+28 |
| Hawaii |  |
+72 |
| Honolulu | |
+72 |
| Houston | |
+74 |
| Las Vegas |  |
+34 |
| Los Angeles | |
+40 |
| Maui | |
+66 |
| Miami |  |
+74 |
| Miami Beach |  |
+78 |
| New York | |
+38 |
| San Diego | |
+44 |
| San Francisco | |
+42 |
| Sarasota | |
+68 |
| Tampa | |
+70 |
| Washington | |
+38 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Mackinac Island
Local time: 08:20
21 feb, saturday
| 0900 |  |
26°F | SW 7 mph |
| 1200 |  |
28°F | W 7 mph |
| 1500 | |
28°F | W 7 mph |
| 1800 | |
26°F | W 5 mph |
| 2100 | |
24°F | W 4 mph |
22 feb, sunday
| 0000 | |
24°F | SW 5 mph |
| 0300 | |
22°F | SW 8 mph |
| 0600 | |
22°F | SW 6 mph |