Current sea water temperature:
+34.7°F
| Minimum sea water temperature in December: | 42.3°F |
| Maximum sea water temperature in December: | 31.6°F |
| Average sea water temperature in December: | 36.4°F |
| more information | |
14 days
forecast
forecast
| Green Bay |
monthly
weather
weather
| Green Bay |
Sea water temperature for the last 10 days:
| December 18 | 34.7°F | December 13 | 35.2°F |
| December 17 | 34.7°F | December 12 | 35.8°F |
| December 16 | 34.7°F | December 11 | 36.3°F |
| December 15 | 34.7°F | December 10 | 36.9°F |
| December 14 | 34.7°F | December 9 | 37.2°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:
2025
2024
2023
The average sea water temperature in July of 2025 was 75.8°F. The highest and lowest sea temperatures during the month were 81.1°F and 73.0°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.6°F. The highest and lowest sea temperatures during the month were 76.8°F and 68.0°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
December
December
| 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: 19:47
December 18, thursday
2100
32°F
E
17 mph
17 mph
December 19, friday
0000
28°F
E
18 mph
18 mph
0300
23°F
SE
21 mph
21 mph
0600
18°F
SE
20 mph
20 mph
0900
14°F
SE
19 mph
19 mph
1200
19°F
SE
17 mph
17 mph
1500
23°F
SE
12 mph
12 mph
1800
19°F
NE
6 mph
6 mph
