Current sea water temperature:
+57.9°F
| Minimum sea water temperature in June: | 61.7°F |
| Maximum sea water temperature in June: | 45.0°F |
| Average sea water temperature in June: | 54.6°F |
| more information | |
14 days
forecast
forecast
| Mackinac Island |
monthly
weather
weather
| Mackinac Island |
Sea water temperature for the last 10 days:
| June 26 | 57.9°F | June 21 | 55.4°F |
| June 25 | 57.4°F | June 20 | 53.6°F |
| June 24 | 57.7°F | June 19 | 54.3°F |
| June 23 | 56.5°F | June 18 | 53.4°F |
| June 22 | 55.6°F | June 17 | 54.9°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
July
July
| 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: 18:20
June 26, friday
2100
61°F
S
6 mph
6 mph
June 27, saturday
0000
59°F
SE
3 mph
3 mph
0300
57°F
S
2 mph
2 mph
0600
57°F
S
3 mph
3 mph
0900
61°F
SW
3 mph
3 mph
1200
63°F
W
4 mph
4 mph
1500
66°F
NW
6 mph
6 mph
1800
68°F
W
7 mph
7 mph
