Keweenaw Bay water temp

This data the coastal Keweenaw Bay 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 Keweenaw Bay

Water temperature in Keweenaw Bay today is 57.7°F. Based on our historical data over a period of ten years, the warmest water in this day in the Lake Superior near Keweenaw Bay was recorded in 2021 and was 61.5°F, and the coldest was recorded in 2019 at 46.2°F. Water temperature in Keweenaw Bay is expected to drop to 51.3°F in the next 10 days. October average water temperature in Keweenaw Bay is 53.6°F, the minimum temperature is 44.6°F, and the maximum is 64.9°F.

The swimming season in Keweenaw Bay lasts only one month - August. During this month, Keweenaw Bay water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Keweenaw Bay in winter reaches 36°F, in spring 35.1°F, in summer the average temperature rises to 58.6°F, and in autumn it is 53.8°F.

Keweenaw Bay water temperature now

Surf Forecast in Keweenaw Bay 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 Keweenaw Bay. 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 Keweenaw Bay. 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 Keweenaw Bay

Keweenaw Bay weather forecast

Current temperature and weather

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

0-3 h	3-6 h	6-9 h	9-12 h
54.9°F	54.3°F	55°F	56.3°F

12-15 h	15-18 h	18-21 h	21-24 h
57.6°F	60.6°F	58.3°F	51.3°F

Keweenaw Bay water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Keweenaw Bay. 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 Keweenaw Bay 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 Keweenaw Bay

The nearest beaches and cities from Keweenaw Bay 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
McLain State Park	59.5°F	59°F		2' 11"
Calumet	59.9°F	57.2°F		2' 9"
Eagle Harbor	59.2°F	51.8°F		2' 4"
Isle Royale	54.5°F	57.2°F		3' 9"
Rock River	57°F	59°F		0' 9"
Au Train	57.2°F	59°F		0' 9"
Christmas	57.7°F	59°F		0' 9"
Munising	57.7°F	59°F		0' 9"
Pictured Rocks	57.6°F	57.2°F		1' 6"
Grand Portage	52.9°F	55.4°F		3' 3"

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Our report for Keweenaw Bay 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.