Measurements:
°C
°F
CURRENT WEATHER
22:44
Mackinac Island
46°F
W 11 mph
Feels like: 40°F
Precip: 5%
World Resorts USA Mackinac Island Weather

7 Day Weather Forecast

10.26
mon
DAY
48°F
S 16 mph
precip
6%
NIGHT
46°F
W 11 mph
precip
5%
10.27
tue
DAY
48°F
NW 16 mph
precip
18%
NIGHT
48°F
NW 16 mph
precip
19%
10.28
wed
DAY
60°F
NE 11 mph
precip
18%
NIGHT
56°F
N 11 mph
precip
9%
10.29
thu
DAY
54°F
E 15 mph
precip
32%
NIGHT
48°F
SE 14 mph
precip
8%
10.30
fri
DAY
46°F
SE 11 mph
precip
6%
NIGHT
46°F
SW 7 mph
precip
18%
10.31
sat
DAY
48°F
NW 7 mph
precip
23%
NIGHT
48°F
NW 6 mph
precip
37%
11.01
sun
DAY
52°F
W 11 mph
precip
50%
NIGHT
52°F
NW 3 mph
precip
37%

Mackinac Island Sea Water Temperature in October, °F

Select Year: 2026 2025 2024

The average sea surface temperature in October 2026 for Mackinac Island was 13.2°F. The maximum and minimum values were 10.4°F and 15.8°F respectively.

Mackinac Island on the Weather Map

Best Time to Visit Mackinac Island
The most sunny months:
July 16 days
August 14 days
June 12 days
The most warm months:
August 71.7 °F
July 71.6 °F
September 64.5 °F
Warmest sea temperature:
August 69.4 °F
July 67.0 °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
July 2 days
April 2 days
The most windy months:
November 13 mph
December 13 mph
April 11 mph
more details