Measurements:
°C
°F
Mackinac Island
42°F
SW 6 mph
Feels like: 38°F
Precip: 0%
World Resorts USA Mackinac Island Weather

Mackinac Island Sea Water Temperature

Current Sea Water Temperature:
+47.8°F
Maximum Sea Water Temperature in November: 55.6°F
Minimum Sea Water Temperature in November: 39.2°F
Average water temperature in November: 46.8°F

Sea Water Temperature for the Last 10 Days:

November 21 47.8°F November 16 46.2°F
November 20 48.0°F November 15 48.4°F
November 19 48.4°F November 08 50.2°F
November 18 47.8°F November 07 50.6°F
November 17 46.6°F November 06 49.4°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: 2024 2023 2022

The average sea surface temperature in August 2024 for Mackinac Island was 70.2°F. The maximum and minimum values were 65.8°F and 75.8°F respectively.

Sea Water Temperature in July

Select Year: 2024 2023 2022

The average sea surface temperature in July 2024 for Mackinac Island was 67.2°F. The maximum and minimum values were 58.2°F and 74.2°F respectively.

Sea Water Temperature in September

Select Year: 2024 2023 2022

The average sea surface temperature in September 2024 for Mackinac Island was 66.1°F. The maximum and minimum values were 63.4°F and 67.8°F respectively.

Best Time to Visit Mackinac Island
The most sunny months:
July 15 days
August 15 days
September 13 days
The most warm months:
August 71.9 °F
July 71.8 °F
September 64.8 °F
Warmest sea temperature:
August 68.8 °F
July 66.6 °F
September 64.3 °F
The most cold months:
February 20.1 °F
January 21.8 °F
March 29.2 °F
The most rainy months:
August 3 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 +48
Chicago +34
Hawaii +80
Honolulu +80
Houston +74
Las Vegas +60
Los Angeles +74
Maui +74
Miami +86
New York +48
San Diego +72
San Francisco +58
Sarasota +76
Tampa +76
Washington +52
24 Hours Weather Forecast
Mackinac Island
Local time: 16:15
21 nov, thursday
1800 42°F
S
7 mph
2100 42°F
S
11 mph
22 nov, friday
0000 40°F
S
11 mph
0300 42°F
S
15 mph
0600 42°F
S
16 mph
0900 42°F
S
16 mph
1200 44°F
S
16 mph
1500 44°F
S
16 mph