Measurements:
°C
°F
CURRENT WEATHER
08:41
Green Bay
68°F
NE 17 mph
Feels like: 68°F
Precip: 32%
World Resorts USA Green Bay Weather

7 Day Weather Forecast

09.15
tue
DAY
76°F
E 19 mph
precip
15%
NIGHT
62°F
SW 11 mph
precip
15%
09.16
wed
DAY
68°F
W 9 mph
precip
13%
NIGHT
64°F
N 2 mph
precip
20%
09.17
thu
DAY
68°F
SE 2 mph
precip
19%
NIGHT
62°F
W 4 mph
precip
29%
09.18
fri
DAY
74°F
NW 10 mph
precip
12%
NIGHT
60°F
W 12 mph
precip
54%
09.19
sat
DAY
70°F
NE 7 mph
precip
50%
NIGHT
60°F
SW 14 mph
precip
31%
09.20
sun
DAY
60°F
W 16 mph
precip
87%
NIGHT
60°F
SW 15 mph
precip
67%
09.21
mon
DAY
58°F
W 16 mph
precip
48%
NIGHT
58°F
W 12 mph
precip
67%

Green Bay Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Green Bay was 23.4°F. The maximum and minimum values were 21.2°F and 24.9°F respectively.

Green Bay on the Weather Map

Best Time to Visit Green Bay
The most sunny months:
August 15 days
July 14 days
September 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
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
more details