Copper Harbor water temp

This data the coastal Copper Harbor 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 Copper Harbor

Water temperature in Copper Harbor today is 58.1°F. Based on our historical data over a period of ten years, the warmest water in this day in the Lake Superior near Copper Harbor was recorded in 2021 and was 59°F, and the coldest was recorded in 2018 at 45.1°F. Water temperature in Copper Harbor is expected to drop to 48.9°F in the next 10 days. October average water temperature in Copper Harbor is 52°F, the minimum temperature is 42.3°F, and the maximum is 63.9°F.

Throughout the year, the water temperature in Copper Harbor does not rise above 68°F and therefore is not suitable for comfortable swimming. But on some days of August, the water temperature warms up to 68°F and above. The average water temperature in Copper Harbor in winter reaches 36.5°F, in spring 35.1°F, in summer the average temperature rises to 51.1°F, and in autumn it is 52°F.

Copper Harbor water temperature now

Surf Forecast in Copper Harbor 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 Copper Harbor. 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 Copper Harbor. Data in table shown for October 16, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Copper Harbor

Copper Harbor weather forecast

Current temperature and weather

Data in a table show Copper Harbor temperature today (October 16, 2025). For more information and forecast for a few days, go to the weather forecast Copper Harbor.

0-3 h	3-6 h	6-9 h	9-12 h
43.3°F	42.3°F	41.5°F	44.1°F

12-15 h	15-18 h	18-21 h	21-24 h
49.6°F	50.7°F	52°F	52.2°F

Copper Harbor water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Copper Harbor. 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 Copper Harbor 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 Copper Harbor

The nearest beaches and cities from Copper Harbor 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
Eagle Harbor	56.5°F	50°F		0' 3"
Eagle River	57.2°F	55.4°F		0' 3"
Calumet	58.6°F	55.4°F		0' 4"
McLain State Park	58.6°F	55.4°F		0' 5"
Keweenaw Bay	57°F	59°F		0' 2"
Houghton	57.2°F	55.4°F		0' 1"
Isle Royale	52.7°F	50°F		0' 7"
Marquette	55.4°F	53.6°F		0' 4"
Harvey	55.8°F	55.4°F		0' 5"
Ontonagon	56.3°F	59°F		0' 5"

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Our report for Copper Harbor 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.