Measurements:
°C
°F
Green Bay
86°F
NE 15 mph
Feels like: 88°F
Precip: 2%
World Resorts USA Green Bay Weather

Green Bay Sea Water Temperature

Current Sea Water Temperature:
+74.4°F
Maximum Sea Water Temperature in August: 81.8°F
Minimum Sea Water Temperature in August: 68.8°F
Average water temperature in August: 76.5°F

Sea Water Temperature for the Last 10 Days:

August 25 74.4°F August 20 78.6°F
August 24 75.6°F August 19 81.0°F
August 23 76.4°F August 18 79.8°F
August 22 77.0°F August 17 79.8°F
August 21 77.6°F August 16 79.0°F

When is the Warmest Sea for Green Bay?

According to our data for the last three years for Green Bay the highest average sea water temperature was in July, August and June.

Average Water Temperature by Month, °F

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Green Bay was 80.0°F. The maximum and minimum values were 75.8°F and 85.2°F respectively.

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Green Bay was 78.8°F. The maximum and minimum values were 74.4°F and 81.6°F respectively.

Sea Water Temperature in June

Select Year: 2026 2025 2024

The average sea surface temperature in June 2026 for Green Bay was 71.9°F. The maximum and minimum values were 67.2°F and 75.6°F respectively.

Best Time to Visit Green Bay
The most sunny months:
July 14 days
August 14 days
September 13 days
The most warm months:
July 82.2 °F
August 80.6 °F
June 76.9 °F
Warmest sea temperature:
July 78.0 °F
August 76.5 °F
June 70.2 °F
The most cold months:
January 20.8 °F
February 24.3 °F
December 28.0 °F
The most rainy months:
June 3 days
April 3 days
July 2 days
The most windy months:
April 11 mph
March 11 mph
November 11 mph

Green Bay on the Weather Map

USA Resorts:
NAME
Boston +80
Chicago +80
Hawaii +84
Houston +106
Las Vegas +116
Los Angeles +96
Maui +70
Miami +92
Myrtle Beach +84
New York +82
San Diego +96
San Francisco +64
Santa Monica +86
Sarasota +92
Washington +84
24 Hours Weather Forecast
Green Bay
Local time: 16:36
25 aug, tuesday
1800 86°F
NE
15 mph
2100 74°F
NE
11 mph
26 aug, wednesday
0000 68°F
N
10 mph
0300 66°F
N
14 mph
0600 66°F
NE
17 mph
0900 70°F
NE
14 mph
1200 84°F
E
15 mph
1500 86°F
E
17 mph