Current sea water temperature:
+31.8°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: | 36.2°F |
| more information | |
14 days
forecast
forecast
| Green Bay |
monthly
weather
weather
| Green Bay |
Sea water temperature for the last 10 days:
| December 29 | 31.8°F | December 24 | 33.4°F |
| December 28 | 31.6°F | December 23 | 33.8°F |
| December 27 | 32.2°F | December 22 | 34.3°F |
| December 26 | 32.5°F | December 21 | 34.7°F |
| December 25 | 33.1°F | December 20 | 34.7°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
January
January
| 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: 23:37
December 30, tuesday
0000
16°F
SE
13 mph
13 mph
0300
14°F
E
12 mph
12 mph
0600
12°F
E
11 mph
11 mph
0900
14°F
E
9 mph
9 mph
1200
16°F
E
12 mph
12 mph
1500
18°F
E
11 mph
11 mph
1800
19°F
E
8 mph
8 mph
2100
21°F
E
8 mph
8 mph
