21.07
tue
tue
Day
64°F
SE 20 mph
Precip.
49%
49%
Night
54°F
SE 22 mph
Precip.
25%
25%
22.07
wed
wed
Day
64°F
SE 21 mph
Precip.
1%
1%
Night
63°F
E 14 mph
Precip.
3%
3%
23.07
thu
thu
Day
70°F
E 11 mph
Precip.
5%
5%
Night
68°F
NE 13 mph
Precip.
7%
7%
24.07
fri
fri
Day
72°F
E 16 mph
Precip.
10%
10%
Night
66°F
NE 7 mph
Precip.
7%
7%
25.07
sat
sat
Day
73°F
NE 10 mph
Precip.
5%
5%
Night
70°F
NE 14 mph
Precip.
7%
7%
26.07
sun
sun
Day
72°F
E 19 mph
Precip.
47%
47%
Night
64°F
S 11 mph
Precip.
25%
25%
27.07
mon
mon
Day
68°F
SW 7 mph
Precip.
6%
6%
Night
63°F
S 13 mph
Precip.
4%
4%
sea water
temperature
temperature
| Mackinac Island |
monthly
weather
weather
| Mackinac Island |
current
weather
weather
| Mackinac Island |
14 days
forecast
forecast
| Mackinac Island |
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 67.4°F. The highest and lowest sea temperatures during the month were 70.9°F and 62.2°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.
Air temperature in Mackinac Island, °F
Precipitation total in Mackinac Island, in.
* Charts above show average data for the last 3 years.
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: 09:44
July 21, tuesday
1200
64°F
SE
20 mph
20 mph
1500
64°F
SE
22 mph
22 mph
1800
61°F
SE
25 mph
25 mph
2100
54°F
SE
22 mph
22 mph
July 22, wednesday
0000
54°F
SE
22 mph
22 mph
0300
54°F
SE
20 mph
20 mph
0600
55°F
SE
20 mph
20 mph
0900
57°F
SE
17 mph
17 mph
