Measurements:
°C
°F
Green Bay
36°F
SE 25 mph
Feels like: 24°F
Precip: 0%
World Resorts USA Green Bay Weather

Green Bay Sea Water Temperature

Current Sea Water Temperature:
+32.2°F
Maximum Sea Water Temperature in March: 39.4°F
Minimum Sea Water Temperature in March: 30.2°F
Average water temperature in March: 32.7°F

Sea Water Temperature for the Last 10 Days:

March 13 32.2°F March 08 33.2°F
March 12 32.6°F March 07 33.4°F
March 11 33.0°F March 06 33.6°F
March 10 33.6°F March 05 32.6°F
March 09 31.4°F March 04 33.0°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 September.

Average Water Temperature by Month, °F

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Green Bay was 78.7°F. The maximum and minimum values were 75.6°F and 84.6°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Green Bay was 76.2°F. The maximum and minimum values were 70.0°F and 79.8°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Green Bay was 69.0°F. The maximum and minimum values were 63.2°F and 73.4°F respectively.

Best Time to Visit Green Bay
The most sunny months:
August 14 days
September 13 days
October 13 days
The most warm months:
July 81.2 °F
August 80.6 °F
June 76.5 °F
Warmest sea temperature:
July 77.6 °F
August 76.2 °F
September 70.1 °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
August 2 days
The most windy months:
April 11 mph
November 11 mph
March 11 mph

Green Bay on the Weather Map

USA Resorts:
NAME
Chicago +42
Hawaii +74
Honolulu +74
Houston +82
Las Vegas +88
Los Angeles +98
Maui +70
Miami +86
Miami Beach +86
New York +42
San Diego +98
San Francisco +70
Sarasota +80
Tampa +82
Washington +56
24 Hours Weather Forecast
Green Bay
Local time: 14:56
13 mar, friday
1500 36°F
SE
25 mph
1800 34°F
SE
22 mph
2100 28°F
SE
17 mph
14 mar, saturday
0000 24°F
SE
12 mph
0300 22°F
SE
10 mph
0600 22°F
S
7 mph
0900 24°F
S
4 mph
1200 30°F
SW
2 mph