World Resorts USA Chicago Weather

Chicago sea water temperature

Current sea water temperature:
+61.3°F
Minimum sea water temperature in June: 72.3°F
Maximum sea water temperature in June: 32.0°F
Average sea water temperature in June: 59.7°F

Sea water temperature for the last 10 days:

June 25 61.3°F June 20 60.4°F
June 24 60.8°F June 19 59.2°F
June 23 60.4°F June 18 58.5°F
June 22 61.2°F June 17 60.6°F
June 21 61.3°F June 16 61.3°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.

Best time for vacation in Chicago

Sunniest months:
September 17 days
August 16 days
June 15 days
Warmest months:
July 80.4 °F
August 79.9 °F
June 74.3 °F
Warmest sea temp:
August 70.3 °F
July 68.2 °F
September 66.1 °F
Coldest months:
January 28.1 °F
February 31.1 °F
December 35.7 °F
Rainiest months:
June 7 days
May 6 days
July 5 days
Windiest months:
November 12.2 mph
January 12.0 mph
February 11.6 mph

Chicago on a weather map

Chicago
+66°F
SW 6 mph
Feels like: +66°F
Precip.: 10%
Places in USA:
Name
°F
+64°F
+77°F
+86°F
+61°F
+77°F
+84°F
+72°F
+73°F
+68°F
+63°F
+54°F
+77°F
+77°F
+79°F
+66°F
24 Hours Forecast
Chicago
Local time: 02:06
June 26, friday
0300
66°F
SW
6 mph
0600
66°F
SW
6 mph
0900
66°F
W
11 mph
1200
63°F
SW
6 mph
1500
61°F
SW
6 mph
1800
61°F
SW
7 mph
2100
61°F
SW
8 mph
June 27, saturday
0000
61°F
SW
8 mph
Units of measurement: °C / °F