Measurements:
°C
°F
Green Bay
56°F
NW 3 mph
Feels like: 56°F
Precip: 2%
World Resorts USA Green Bay Weather

Green Bay Sea Water Temperature

Current Sea Water Temperature:
+65.0°F
Maximum Sea Water Temperature in October: 71.6°F
Minimum Sea Water Temperature in October: 47.6°F
Average water temperature in October: 59.2°F

Sea Water Temperature for the Last 10 Days:

October 05 65.0°F September 30 67.0°F
October 04 65.6°F September 29 67.8°F
October 03 66.2°F September 28 65.2°F
October 02 65.8°F September 27 64.8°F
October 01 66.4°F September 26 64.2°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: 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 78.1°F. The maximum and minimum values were 74.4°F and 81.6°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Green Bay was 72.1°F. The maximum and minimum values were 63.6°F and 79.8°F respectively.

Best Time to Visit Green Bay
The most sunny months:
August 15 days
July 14 days
October 13 days
The most warm months:
July 82.2 °F
August 80.9 °F
June 76.9 °F
Warmest sea temperature:
July 78.0 °F
August 76.4 °F
September 70.4 °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
September 2 days
The most windy months:
April 11 mph
March 11 mph
November 11 mph

Green Bay on the Weather Map

USA Resorts:
NAME
F°
Boston +58
Chicago +62
Hawaii +82
Houston +86
Las Vegas +92
Los Angeles +100
Maui +74
Miami +88
Myrtle Beach +70
New York +62
San Diego +84
San Francisco +66
Santa Monica +94
Sarasota +84
Washington +64
24 Hours Weather Forecast
Green Bay
Local time: 18:52
05 oct, monday
2100 46°F
N
10 mph
06 oct, tuesday
0000 46°F
N
9 mph
0300 52°F
N
11 mph
0600 52°F
N
12 mph
0900 56°F
N
16 mph
1200 68°F
NE
20 mph
1500 72°F
NE
21 mph
1800 68°F
NE
19 mph