Measurements:
°C
°F
Mackinac Island
42°F
SE 9 mph
Feels like: 36°F
Precip: 0%
World Resorts USA Mackinac Island Weather

Mackinac Island Sea Water Temperature

Current Sea Water Temperature:
+40.4°F
Maximum Sea Water Temperature in April: 40.4°F
Minimum Sea Water Temperature in April: 30.2°F
Average water temperature in April: 34.2°F

Sea Water Temperature for the Last 10 Days:

April 28 40.4°F April 23 37.0°F
April 27 37.4°F April 22 37.6°F
April 26 37.8°F April 21 37.6°F
April 25 38.2°F April 20 38.2°F
April 24 38.0°F April 19 36.2°F

When is the Warmest Sea for Mackinac Island?

According to our data for the last three years for Mackinac Island the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2023 2022 2021

The average sea surface temperature in August 2023 for Mackinac Island was 65.9°F. The maximum and minimum values were 61.0°F and 69.6°F respectively.

Sea Water Temperature in July

Select Year: 2023 2022 2021

The average sea surface temperature in July 2023 for Mackinac Island was 66.9°F. The maximum and minimum values were 62.6°F and 70.0°F respectively.

Sea Water Temperature in September

Select Year: 2023 2022 2021

The average sea surface temperature in September 2023 for Mackinac Island was 63.2°F. The maximum and minimum values were 60.4°F and 67.4°F respectively.

Best Time to Visit Mackinac Island
The most sunny months:
July 15 days
August 15 days
September 14 days
The most warm months:
August 72.0 °F
July 71.8 °F
June 64.9 °F
Warmest sea temperature:
August 68.4 °F
July 66.4 °F
September 63.8 °F
The most cold months:
February 20.1 °F
January 21.8 °F
March 29.2 °F
The most rainy months:
August 4 days
July 3 days
March 2 days
The most windy months:
November 13 mph
December 12 mph
April 11 mph

Mackinac Island on the Weather Map

USA Resorts:
NAME
Boston +44
Chicago +62
Hawaii +76
Honolulu +76
Houston +76
Las Vegas +62
Los Angeles +58
Miami +78
New York +52
Orlando +68
San Diego +58
San Francisco +52
Sarasota +70
Tampa +70
Washington +54
24 Hours Weather Forecast
Mackinac Island
Local time: 05:26
28 apr, sunday
0600 42°F
SE
9 mph
0900 42°F
S
6 mph
1200 46°F
SW
9 mph
1500 48°F
W
9 mph
1800 48°F
W
11 mph
2100 48°F
W
11 mph
29 apr, monday
0000 44°F
W
19 mph
0300 42°F
W
21 mph