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 66.9°F. Based on our historical data over a period of ten years, the warmest water in this day in Green Bay was recorded in 2023 and was 67.8°F, and the coldest was recorded in 2022 at 60.1°F. Water temperature in Green Bay is expected to drop to 58.5°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
| October 2, 2025 |
|---|
| today temp |
| 66.9°F |
| October 1, 2025 |
|---|
| yesterday temp |
| 67.5°F |
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 2, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
| 0' 3" | 0' 2" | 0' 2" | 0' 2" |
| 0.08 m | 0.04 m | 0.04 m | 0.06 m |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
| 0' 6" | 0' 6" | 0' 9" | 0' 10" |
| 0.14 m | 0.15 m | 0.22 m | 0.25 m |
Surf report in Green Bay
Green Bay weather forecast
Current temperature and weather
Data in a table show Green Bay temperature today (October 2, 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 |
|---|---|---|---|
 | | |  |
| 59.2°F | 57.9°F | 57°F | 63.5°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | | |
| 72.9°F | 80.2°F | 71.2°F | 62.8°F |
You may also be interested in other sections of our site for Green Bay: Sunrise and Sunset, Tides
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
| Month | Avr | Min | Max | |
|---|---|---|---|---|
| January | 32°F | 28.4°F | 35.8°F | cold |
| Water temperature in Green Bay in January | ||||
| February | 32°F | 29.1°F | 35.8°F | cold |
| Water temperature in Green Bay in February | ||||
| March | 33.6°F | 30.6°F | 40.3°F | cold |
| Water temperature in Green Bay in March | ||||
| April | 40.5°F | 31.6°F | 52°F | cold |
| Water temperature in Green Bay in April | ||||
| May | 54.9°F | 36.5°F | 65.8°F | cold |
| Water temperature in Green Bay in May | ||||
| June | 67.5°F | 58.5°F | 76.1°F | cold |
| Water temperature in Green Bay in June | ||||
| July | 74.5°F | 65.3°F | 81.5°F | warm |
| Water temperature in Green Bay in July | ||||
| August | 73°F | 65.5°F | 78.6°F | warm |
| Water temperature in Green Bay in August | ||||
| September | 67.5°F | 59.2°F | 74.3°F | cold |
| Water temperature in Green Bay in September | ||||
| October | 56.5°F | 48°F | 68.7°F | cold |
| Water temperature in Green Bay in October | ||||
| November | 45.5°F | 37.2°F | 52.9°F | cold |
| Water temperature in Green Bay in November | ||||
| December | 36°F | 29.3°F | 43.2°F | cold |
| Water temperature in Green Bay in December | ||||
Chart monthly average water temperature in Green Bay
