Measurements:
°C
°F
Green Bay
46°F
SW 12 mph
Feels like: 40°F
Precip: 19%
World Resorts USA Green Bay Weather

Green Bay Sea Water Temperature

Current Sea Water Temperature:
+56.6°F
Maximum Sea Water Temperature in October: 71.6°F
Minimum Sea Water Temperature in October: 47.6°F
Average water temperature in October: 59.3°F

Sea Water Temperature for the Last 10 Days:

October 26 56.6°F October 21 54.8°F
October 25 55.8°F October 20 55.4°F
October 24 55.2°F October 19 56.0°F
October 23 55.8°F October 18 58.4°F
October 22 55.4°F October 17 60.6°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 +58
Hawaii +80
Houston +74
Las Vegas +64
Los Angeles +74
Maui +72
Miami +82
New York +62
Panama City Beach +64
San Diego +74
San Francisco +60
Santa Monica +72
Tampa +72
Washington +58
24 Hours Weather Forecast
Green Bay
Local time: 23:48
27 oct, tuesday
0000 46°F
SW
12 mph
0300 44°F
SW
12 mph
0600 46°F
W
10 mph
0900 50°F
NW
9 mph
1200 56°F
NW
13 mph
1500 56°F
NW
13 mph
1800 54°F
NW
10 mph
2100 54°F
N
9 mph