Green Bay water temp

This data the coastal Green 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 Green Bay

Water temperature in Green Bay today is 57.2°F. Based on our historical data over a period of ten years, the warmest water in this day in Green Bay was, like today, 57.2°F, and the coldest was recorded in 2022 at 48.9°F. Water temperature in Green Bay is expected to drop to 49.5°F in the next 10 days. October average water temperature in Green Bay is 56.5°F, the minimum temperature is 48°F, and the maximum is 68.7°F.

The swimming season in Green Bay lasts from June to September. During those months, Green Bay water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Green Bay in winter reaches 33.3°F, in spring 43°F, in summer the average temperature rises to 71.6°F, and in autumn it is 56.5°F.

Green Bay water temperature now

Surf Forecast in Green 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 Green 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 Green Bay. Data in table shown for October 23, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Green Bay

Green Bay weather forecast

Current temperature and weather

Data in a table show Green Bay temperature today (October 23, 2025). For more information and forecast for a few days, go to the weather forecast Green Bay.

0-3 h	3-6 h	6-9 h	9-12 h
39.2°F	37.4°F	37.9°F	41.2°F

12-15 h	15-18 h	18-21 h	21-24 h
45.9°F	49.1°F	46.2°F	41.5°F

Green Bay water temperature by month

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

Water temperature at Lake Michigan

The nearest beaches and cities from Green 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
Suamico	57.6°F	50°F		1' 1"
Oconto	58.3°F	48.2°F		1' 0"
Kewaunee	55.2°F	48.2°F		2' 0"
Algoma	56.7°F	48.2°F		2' 1"
Little Sturgeon Bay	58.3°F	48.2°F		1' 3"
Sturgeon Bay	55.6°F	48.2°F		1' 9"
Marinette	58.3°F	48.2°F		1' 1"
Two Rivers	55.6°F	48.2°F		2' 10"
Menominee	57.9°F	48.2°F		1' 7"
Lake Winnebago	57.2°F	48.2°F		2' 0"

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Our report for Green 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.