All data are in degrees Fahrenheit

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Water temperature in Chicago

Detailed information about the current water temperature in Chicago. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Water temperature in Chicago now

73.6

°F

September 2, 23:45

Trend:

increasing

Yesterday:

73.2°F

Tomorrow:

73.9°F

Sunrise:

06:17

Sunset:

19:23

Day Length:

13 h. 6 min.

Chicago in September

Minimum:

33.1°F

Average:

36.3°F

Maximum:

38.2°F

Water temperature in Chicago today

As of now, in Chicago, the water temperature is 73.6°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 2.3°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent water temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 74.8°F on 2021, while the historical minimum was 64.0°F on 2019.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 72.8°F, the minimum temperature may reach 71.5°F, and the maximum might stay at 73.9°F.

Daily water temperature in Chicago

Date Current Year

actual* / forecast**

last year 10 years average
Aug 19 73.3°F 76.0°F 73.9°F
Aug 20 73.4°F 75.7°F 74.0°F
Aug 21 73.5°F 74.6°F 73.9°F
Aug 22 73.4°F 72.9°F 73.4°F
Aug 23 73.4°F 73.7°F 73.1°F
Aug 24 73.2°F 74.1°F 73.3°F
Aug 25 73.2°F 73.3°F 73.4°F
Aug 26 73.2°F 72.6°F 73.2°F
Aug 27 73.7°F 71.6°F 73.1°F
Aug 28 73.8°F 70.1°F 73.0°F
Aug 29 74.0°F 69.5°F 72.6°F
Aug 30 73.9°F 69.5°F 72.5°F
Aug 31 73.2°F 70.7°F 72.4°F
Sep 1 73.2°F 70.3°F 71.9°F
Sep 2 73.6°F 69.9°F 71.4°F
Sep 3 73.9°F 69.9°F 71.6°F
Sep 4 73.8°F 69.6°F 71.5°F
Sep 5 73.1°F 68.7°F 70.8°F
Sep 6 72.7°F 67.8°F 70.4°F
Sep 7 72.6°F 67.0°F 70.3°F
Sep 8 72.1°F 66.3°F 69.8°F
Sep 9 71.5°F 66.3°F 69.2°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Water temperature in Chicago by month

In Chicago, there are only 15 days through the year when the water is warm enough to be comfortable for swimming.
The warmest water in Chicago was recorded on July 18, 2026, reaching a 78.7°F. While the coldest temperature occurred on January 14, 2018, dipping to 32.0°F. The average readings by season are 36.7°F in Winter, 43.4°F in Spring, 68.9°F in Summer, and 59.3°F in Autumn.