Current sea water temperature:
+72.7°F
| Minimum sea water temperature in July: | 77.9°F |
| Maximum sea water temperature in July: | 32.0°F |
| Average sea water temperature in July: | 68.2°F |
| more information | |
14 days
forecast
forecast
| Chicago |
monthly
weather
weather
| Chicago |
Sea water temperature for the last 10 days:
| July 12 | 72.7°F | July 7 | 70.0°F |
| July 11 | 72.9°F | July 6 | 68.2°F |
| July 10 | 72.3°F | July 5 | 68.2°F |
| July 9 | 72.0°F | July 4 | 69.3°F |
| July 8 | 70.7°F | July 3 | 67.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Chicago?
Based on the data about daily sea water temperature for the last three years the warmest sea in Chicago was noticed in August, July and September.
Monthly Sea Temperatures in Chicago, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.8°F. The highest and lowest sea temperatures during the month were 77.9°F and 69.1°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 73.3°F. The highest and lowest sea temperatures during the month were 76.3°F and 70.9°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 65.0°F. The highest and lowest sea temperatures during the month were 70.2°F and 59.0°F.
current
weather
weather
| Chicago |
weather in
July
July
| Chicago |
Best time for vacation in Chicago
Chicago on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Chicago
Local time: 15:46
July 12, sunday
1800
79°F
SW
7 mph
7 mph
2100
75°F
SW
5 mph
5 mph
July 13, monday
0000
75°F
SW
3 mph
3 mph
0300
72°F
SW
2 mph
2 mph
0600
72°F
S
2 mph
2 mph
0900
79°F
S
1 mph
1 mph
1200
84°F
SW
5 mph
5 mph
1500
84°F
W
7 mph
7 mph
