Current sea water temperature:
+32.2°F
| Minimum sea water temperature in March: | 36.7°F |
| Maximum sea water temperature in March: | 32.0°F |
| Average sea water temperature in March: | 33.3°F |
| more information | |
14 days
forecast
forecast
| Mackinac Island |
monthly
weather
weather
| Mackinac Island |
Sea water temperature for the last 10 days:
| March 18 | 32.2°F | March 13 | 33.4°F |
| March 17 | 32.2°F | March 12 | 34.0°F |
| March 16 | 32.2°F | March 11 | 34.7°F |
| March 15 | 32.0°F | March 10 | 35.1°F |
| March 14 | 32.5°F | March 9 | 35.2°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
March
March
| 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: 20:19
March 18, wednesday
2100
28°F
NE
10 mph
10 mph
March 19, thursday
0000
30°F
NE
9 mph
9 mph
0300
30°F
NE
9 mph
9 mph
0600
28°F
E
7 mph
7 mph
0900
28°F
E
6 mph
6 mph
1200
28°F
SE
8 mph
8 mph
1500
30°F
SE
5 mph
5 mph
1800
30°F
E
3 mph
3 mph
