Current sea water temperature:
+72.9°F
| Minimum sea water temperature in September: | 76.8°F |
| Maximum sea water temperature in September: | 61.7°F |
| Average sea water temperature in September: | 68.5°F |
| more information | |
14 days
forecast
forecast
| Green Bay |
monthly
weather
weather
| Green Bay |
Sea water temperature for the last 10 days:
| September 13 | 72.9°F | September 8 | 73.6°F |
| September 12 | 73.4°F | September 7 | 73.9°F |
| September 11 | 74.5°F | September 6 | 75.0°F |
| September 10 | 74.7°F | September 5 | 74.7°F |
| September 9 | 75.0°F | September 4 | 74.8°F |
Monthly sea water temperature, °F
When is the warmest sea in Green Bay?
Based on the data about daily sea water temperature for the last three years the warmest sea in Green Bay was noticed in July, August and September.
Monthly Sea Temperatures in Green Bay, °F
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 77.0°F. The highest and lowest sea temperatures during the month were 81.7°F and 73.2°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 75.3°F. The highest and lowest sea temperatures during the month were 78.4°F and 72.0°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 67.1°F. The highest and lowest sea temperatures during the month were 71.1°F and 61.9°F.
current
weather
weather
| Green Bay |
weather in
September
September
| Green Bay |
Best time for vacation in Green Bay
Green Bay on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Green Bay
Local time: 02:14
September 14, monday
0300
50°F
S
4 mph
4 mph
0600
48°F
SW
2 mph
2 mph
0900
55°F
W
4 mph
4 mph
1200
66°F
N
7 mph
7 mph
1500
68°F
NW
14 mph
14 mph
1800
63°F
N
16 mph
16 mph
2100
63°F
N
14 mph
14 mph
September 15, tuesday
0000
66°F
N
22 mph
22 mph
