World sea water temperatures

Water temperature in Waukegan (IL) in September

Is it warm enough to swim in Waukegan in September? Average water temperature in Waukegan in September is 68°F and therefore suitable for comfortable swimming. The warmest water in Waukegan in September is 74.8°F, and the coldest is 55°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Waukegan

Changes water temperature in Waukegan in September 2025, 2024

To get an accurate forecast for the water temperature in Waukegan for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Waukegan, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
September 170.9°F74.3°F65.7°F74.8°F
September 271.1°F73.8°F66.7°F73.8°F
September 371.1°F73.4°F65.8°F73.4°F
September 470.5°F73.4°F64.4°F73.4°F
September 569.4°F73.4°F63.9°F73.4°F
September 668.4°F73.2°F62.6°F73.6°F
September 767.6°F72.5°F64.8°F73°F
September 867.5°F71.6°F64.6°F72.1°F
September 965.8°F70.9°F63.5°F71.2°F
September 1066.6°F70.5°F64.8°F72.5°F
September 1167.5°F70.9°F65.3°F72.3°F
September 1268.4°F70.7°F65.8°F71.2°F
September 1368.4°F71.4°F64.2°F71.4°F
September 1468.9°F71.4°F64.2°F71.4°F
September 1569.8°F71.8°F63.1°F71.8°F
Day 2025 2024 Min Max
September 1670°F72.5°F62.4°F72.5°F
September 1770.3°F72.7°F62.8°F72.7°F
September 1870.7°F72.3°F63°F72.3°F
September 1971.8°F72.5°F63.1°F72.5°F
September 2071.1°F73.4°F63°F73.4°F
September 2170.9°F73°F62.1°F73°F
September 2270.5°F72.7°F61.5°F72.7°F
September 2370.2°F70.5°F61.5°F70.7°F
September 2469.6°F70°F61.3°F71.2°F
September 2568.9°F70°F61.5°F71.1°F
September 2669.1°F70°F61.2°F70.9°F
September 2769.1°F69.8°F58.3°F70.2°F
September 2869.4°F69.4°F56.3°F70°F
September 2969.3°F69.3°F55°F69.3°F
September 3069.8°F69.4°F55.6°F69.8°F
Waukegan water temp chart in September

Average water temperature in Waukegan in September over a decade

20162017201820192020
68.9°F68.5°F67.6°F63.7°F66.9°F
20212022202320242025
69.1°F68.7°F68.9°F71.6°F

Waukegan sea state in September

Chart comparing the height of waves in Waukegan in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Waukegan in September

Waukegan water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Water temperature at Lake Michigan in September

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Illinois Beach State Park68°F59.7°F74.1°F
Lake Forest67.8°F49.8°F74.3°F
Highland Park67.8°F50.5°F74.3°F
Winthrop Harbor67.8°F61°F73.6°F
Glencoe68°F53.2°F74.7°F
Simmons Island Beach67.6°F61.3°F73.4°F
Winnetka68.2°F55.9°F75°F
Wilmette68.4°F56.8°F75°F
Evanston68.7°F60.6°F75.4°F
Rogers Park68.7°F60.6°F75.4°F

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Waukegan is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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