This data the coastal Wilmette water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.
Water temperature in Wilmette today is 71.6°F. Based on our historical data over a period of ten years, the warmest water in this day in Wilmette was recorded in 2012 and was 74.1°F, and the coldest was recorded in 2019 at 63.5°F. Water temperature in Wilmette is expected to drop to 68.5°F in the next 10 days. September average water temperature in Wilmette is 68.4°F, the minimum temperature is 56.8°F, and the maximum is 75°F.
The swimming season in Wilmette lasts from July to September. During those months, Wilmette water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Wilmette in winter reaches 36.7°F, in spring 42.8°F, in summer the average temperature rises to 68.2°F, and in autumn it is 58.5°F.
September 5, 2025 |
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today temp |
71.6°F |
September 4, 2025 |
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yesterday temp |
71.4°F |
Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Wilmette. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Wilmette. Data in table shown for September 5, 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
1' 3" | 1' 7" | 1' 10" | 1' 8" |
0.37 m | 0.48 m | 0.56 m | 0.52 m |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
1' 11" | 1' 10" | 1' 10" | 1' 8" |
0.58 m | 0.56 m | 0.57 m | 0.5 m |
Data in a table show Wilmette temperature today (September 5, 2025). For more information and forecast for a few days, go to the weather forecast Wilmette.
0-3 h | 3-6 h | 6-9 h | 9-12 h |
---|---|---|---|
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61.7°F | 61.2°F | 59.7°F | 60.4°F |
12-15 h | 15-18 h | 18-21 h | 21-24 h |
---|---|---|---|
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63°F | 65.8°F | 66.4°F | 61.7°F |
You may also be interested in other sections of our site for Wilmette: Sunrise and Sunset, Tides
These figures shows the average, minimum and maximum monthly water temperature in Wilmette. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Wilmette on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve
Month | Avr | Min | Max | |
---|---|---|---|---|
January | 35.6°F | 30.4°F | 41.9°F | cold |
Water temperature in Wilmette in January | ||||
February | 33.8°F | 30.6°F | 38.3°F | cold |
Water temperature in Wilmette in February | ||||
March | 36.5°F | 31.1°F | 45.1°F | cold |
Water temperature in Wilmette in March | ||||
April | 41.7°F | 34.7°F | 50°F | cold |
Water temperature in Wilmette in April | ||||
May | 50.4°F | 42.1°F | 63.7°F | cold |
Water temperature in Wilmette in May | ||||
June | 61.2°F | 49.8°F | 72.1°F | cold |
Water temperature in Wilmette in June | ||||
July | 70.7°F | 59.7°F | 77.9°F | warm |
Water temperature in Wilmette in July | ||||
August | 72.9°F | 66.4°F | 77.4°F | warm |
Water temperature in Wilmette in August | ||||
September | 68.4°F | 56.8°F | 75°F | warm |
Water temperature in Wilmette in September | ||||
October | 58.5°F | 46.4°F | 69.3°F | cold |
Water temperature in Wilmette in October | ||||
November | 48.6°F | 39.6°F | 57.2°F | cold |
Water temperature in Wilmette in November | ||||
December | 40.6°F | 32.5°F | 46.4°F | cold |
Water temperature in Wilmette in December |