Apostle Islands water temp

This data the coastal Apostle Islands water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current water temperature in Apostle Islands

Water temperature in Apostle Islands today is 56.7°F. Based on our historical data over a period of ten years, the warmest water in this day in the Lake Superior near Apostle Islands was recorded in 2021 and was 59.4°F, and the coldest was recorded in 2012 at 46.2°F. Water temperature in Apostle Islands is expected to drop to 49.8°F in the next 10 days. October average water temperature in Apostle Islands is 52.2°F, the minimum temperature is 44.6°F, and the maximum is 63.3°F.

The swimming season in Apostle Islands lasts only one month - August. During this month, Apostle Islands water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Apostle Islands in winter reaches 35.2°F, in spring 36.1°F, in summer the average temperature rises to 58.6°F, and in autumn it is 52.5°F.

Apostle Islands water temperature now

Surf Forecast in Apostle Islands for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Apostle Islands. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Apostle Islands. Data in table shown for October 13, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Apostle Islands

Apostle Islands weather forecast

Current temperature and weather

Data in a table show Apostle Islands temperature today (October 13, 2025). For more information and forecast for a few days, go to the weather forecast Apostle Islands.

0-3 h	3-6 h	6-9 h	9-12 h
57.4°F	57.2°F	53.6°F	50.5°F

12-15 h	15-18 h	18-21 h	21-24 h
51.3°F	55°F	57.4°F	54°F

Apostle Islands water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Apostle Islands. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Apostle Islands on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Apostle Islands

The nearest beaches and cities from Apostle Islands with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Madeline Island	56.5°F	59°F		1' 3"
Big Bay State Park	56.5°F	59°F		1' 3"
Cornucopia	56.3°F	55.4°F		1' 9"
Herbster	54.9°F	55.4°F		1' 10"
Silver Bay	55°F	55.4°F		1' 10"
Beaver Bay	54.5°F	55.4°F		1' 10"
Tofte	55.9°F	51.8°F		2' 4"
Schroeder	56.1°F	51.8°F		2' 4"
Port Wing	55.2°F	57.2°F		1' 6"
Lutsen	55.9°F	55.4°F		2' 5"

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Our report for Apostle Islands is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.