Current sea water temperature:
+70.9°F
| Minimum sea water temperature in August: | 77.9°F |
| Maximum sea water temperature in August: | 32.0°F |
| Average sea water temperature in August: | 70.2°F |
| more information | |
14 days
forecast
forecast
| Chicago |
monthly
weather
weather
| Chicago |
Sea water temperature for the last 10 days:
| August 5 | 70.9°F | July 31 | 72.1°F |
| August 4 | 69.6°F | July 30 | 71.1°F |
| August 3 | 68.5°F | July 29 | 70.5°F |
| August 2 | 70.3°F | July 28 | 74.1°F |
| August 1 | 72.0°F | July 27 | 74.3°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 72.8°F. The highest and lowest sea temperatures during the month were 78.8°F and 66.0°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
August
August
| Chicago |
Best time for vacation in Chicago
Chicago on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Chicago
Local time: 10:49
August 05, wednesday
1200
79°F
NE
5 mph
5 mph
1500
79°F
E
4 mph
4 mph
1800
75°F
SE
11 mph
11 mph
2100
70°F
NW
4 mph
4 mph
August 06, thursday
0000
70°F
W
5 mph
5 mph
0300
70°F
NW
5 mph
5 mph
0600
70°F
N
6 mph
6 mph
0900
70°F
N
7 mph
7 mph
