Measurements:
°C
°F
Green Bay
78°F
NE 14 mph
Feels like: 82°F
Precip: 1%
World Resorts USA Green Bay Weather

Green Bay Sea Water Temperature

Current Sea Water Temperature:
+69.6°F
Maximum Sea Water Temperature in June: 77.8°F
Minimum Sea Water Temperature in June: 59.8°F
Average water temperature in June: 69.9°F

Sea Water Temperature for the Last 10 Days:

June 04 69.6°F May 29 64.0°F
June 03 68.6°F May 28 61.8°F
June 01 67.2°F May 27 60.6°F
May 31 66.8°F May 26 58.8°F
May 30 65.8°F May 25 59.2°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
March 11 mph
November 11 mph

Green Bay on the Weather Map

USA Resorts:
NAME
Boston +90
Chicago +76
Hawaii +78
Honolulu +78
Houston +86
Las Vegas +92
Los Angeles +70
Maui +70
Miami +82
Miami Beach +84
New York +94
San Diego +64
San Francisco +60
Sarasota +94
Tampa +92
24 Hours Weather Forecast
Green Bay
Local time: 11:54
04 jun, thursday
1200 78°F
NE
14 mph
1500 78°F
NE
17 mph
1800 74°F
NE
13 mph
2100 68°F
N
9 mph
05 jun, friday
0000 66°F
NE
8 mph
0300 64°F
N
14 mph
0600 64°F
NE
12 mph
0900 70°F
NE
12 mph