Measurements:
°C
°F
CURRENT WEATHER
14:29
Mackinac Island
74°F
SE 11 mph
Feels like: 80°F
Precip: 8%
World Resorts USA Mackinac Island Weather

7 Day Weather Forecast

07.15
wed
DAY
74°F
E 6 mph
precip
7%
NIGHT
66°F
SE 9 mph
precip
4%
07.16
thu
DAY
78°F
E 9 mph
precip
3%
NIGHT
70°F
S 6 mph
precip
8%
07.17
fri
DAY
72°F
NW 8 mph
precip
8%
NIGHT
68°F
NW 11 mph
precip
10%
07.18
sat
DAY
72°F
E 8 mph
precip
70%
NIGHT
64°F
S 16 mph
precip
7%
07.19
sun
DAY
68°F
SE 2 mph
precip
3%
NIGHT
66°F
N 11 mph
precip
5%
07.20
mon
DAY
74°F
NE 22 mph
precip
37%
NIGHT
62°F
S 20 mph
precip
22%
07.21
tue
DAY
64°F
S 17 mph
precip
3%
NIGHT
66°F
E 9 mph
precip
4%

Mackinac Island Sea Water Temperature in July, °F

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Mackinac Island was 19.4°F. The maximum and minimum values were 16.8°F and 21.6°F respectively.

Mackinac Island on the Weather Map

Best Time to Visit Mackinac Island
The most sunny months:
July 14 days
August 14 days
June 12 days
The most warm months:
August 71.6 °F
July 71.5 °F
September 64.4 °F
Warmest sea temperature:
August 69.2 °F
July 66.8 °F
September 64.1 °F
The most cold months:
February 20.1 °F
January 20.4 °F
December 28.6 °F
The most rainy months:
August 3 days
April 2 days
July 2 days
The most windy months:
November 13 mph
December 13 mph
April 11 mph
more details