Current sea water temperature:
+33.3°F
| Minimum sea water temperature in April: | 41.4°F |
| Maximum sea water temperature in April: | 32.2°F |
| Average sea water temperature in April: | 35.5°F |
| more information | |
14 days
forecast
forecast
| Mackinac Island |
monthly
weather
weather
| Mackinac Island |
Sea water temperature for the last 10 days:
| April 9 | 33.3°F | April 4 | 32.9°F |
| April 8 | 33.3°F | April 3 | 33.1°F |
| April 7 | 33.1°F | April 2 | 32.9°F |
| April 6 | 32.9°F | April 1 | 32.7°F |
| April 5 | 32.9°F | March 31 | 32.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Mackinac Island?
Based on the data about daily sea water temperature for the last three years the warmest sea in Mackinac Island was noticed in August, July and September.
Monthly Sea Temperatures in Mackinac Island, °F
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.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 65.8°F. The highest and lowest sea temperatures during the month were 70.7°F and 59.0°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 61.9°F. The highest and lowest sea temperatures during the month were 67.1°F and 59.4°F.
current
weather
weather
| Mackinac Island |
weather in
April
April
| Mackinac Island |
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: 05:39
April 09, thursday
0600
39°F
NE
11 mph
11 mph
0900
39°F
E
17 mph
17 mph
1200
37°F
E
16 mph
16 mph
1500
37°F
E
15 mph
15 mph
1800
36°F
E
9 mph
9 mph
2100
34°F
E
5 mph
5 mph
April 10, friday
0000
36°F
SE
2 mph
2 mph
0300
32°F
E
2 mph
2 mph
