Measurements:
°C
°F
CURRENT WEATHER
20:26
Mackinac Island
50°F
S 13 mph
Feels like: 44°F
Precip: 3%
World Resorts USA Mackinac Island Weather

7 Day Weather Forecast

10.05
mon
DAY
52°F
SE 23 mph
precip
3%
NIGHT
48°F
S 4 mph
precip
13%
10.06
tue
DAY
54°F
N 12 mph
precip
11%
NIGHT
62°F
NE 22 mph
precip
16%
10.07
wed
DAY
60°F
SE 15 mph
precip
9%
NIGHT
58°F
SE 23 mph
precip
15%
10.08
thu
DAY
54°F
SE 22 mph
precip
13%
NIGHT
52°F
E 9 mph
precip
6%
10.09
fri
DAY
54°F
SE 14 mph
precip
15%
NIGHT
50°F
SW 7 mph
precip
16%
10.10
sat
DAY
54°F
NW 21 mph
precip
20%
NIGHT
66°F
NE 20 mph
precip
4%
10.11
sun
DAY
68°F
NE 17 mph
precip
14%
NIGHT
56°F
NE 14 mph
precip
41%

Mackinac Island Sea Water Temperature in October, °F

Select Year: 2025 2024 2023

The average sea surface temperature in October 2025 for Mackinac Island was 14.5°F. The maximum and minimum values were 11.2°F and 17.1°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
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