Winnetka water temp
This data the coastal Winnetka 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.
Current water temperature in Winnetka
Water temperature in Winnetka today is 72°F. Based on our historical data over a period of ten years, the warmest water in this day in Winnetka was recorded in 2012 and was 73.9°F, and the coldest was recorded in 2019 at 63.7°F. Water temperature in Winnetka is expected to drop to 68.4°F in the next 10 days. September average water temperature in Winnetka is 68.2°F, the minimum temperature is 55.9°F, and the maximum is 75°F.
The swimming season in Winnetka lasts from July to September. During those months, Winnetka water temperature does not drop below 68°F and therefore suitable for comfortable swimming. The average water temperature in Winnetka in winter reaches 36.5°F, in spring 43.2°F, in summer the average temperature rises to 68.2°F, and in autumn it is 58.3°F.
Winnetka water temperature now
| September 5, 2025 |
|---|
| today temp |
| 72°F |
| September 4, 2025 |
|---|
| yesterday temp |
| 71.8°F |
Surf Forecast in Winnetka for today
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 Winnetka. 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 Winnetka. Data in table shown for September 6, 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 |
Surf report in Winnetka
Winnetka weather forecast
Current temperature and weather
Data in a table show Winnetka temperature today (September 6, 2025). For more information and forecast for a few days, go to the weather forecast Winnetka.
| 0-3 h | 3-6 h | 6-9 h | 9-12 h |
|---|---|---|---|
 |  | |  |
| 61.7°F | 61.2°F | 59.7°F | 60.4°F |
| 12-15 h | 15-18 h | 18-21 h | 21-24 h |
|---|---|---|---|
 | | | |
| 63°F | 65.8°F | 66.4°F | 61.7°F |
You may also be interested in other sections of our site for Winnetka: Sunrise and Sunset, Tides
Winnetka water temperature by month
These figures shows the average, minimum and maximum monthly water temperature in Winnetka. 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 Winnetka 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 | 35.4°F | 30.4°F | 41.9°F | cold |
| Water temperature in Winnetka in January | ||||
| February | 33.8°F | 30.6°F | 38.3°F | cold |
| Water temperature in Winnetka in February | ||||
| March | 36.5°F | 31.1°F | 45.1°F | cold |
| Water temperature in Winnetka in March | ||||
| April | 42.1°F | 34.7°F | 51.4°F | cold |
| Water temperature in Winnetka in April | ||||
| May | 50.7°F | 42.3°F | 63.7°F | cold |
| Water temperature in Winnetka in May | ||||
| June | 61.2°F | 50°F | 71.8°F | cold |
| Water temperature in Winnetka in June | ||||
| July | 70.5°F | 59.7°F | 77.9°F | warm |
| Water temperature in Winnetka in July | ||||
| August | 72.7°F | 66.7°F | 77.4°F | warm |
| Water temperature in Winnetka in August | ||||
| September | 68.2°F | 55.9°F | 75°F | warm |
| Water temperature in Winnetka in September | ||||
| October | 58.3°F | 46.4°F | 69.1°F | cold |
| Water temperature in Winnetka in October | ||||
| November | 48.4°F | 39.2°F | 56.7°F | cold |
| Water temperature in Winnetka in November | ||||
| December | 40.3°F | 32.5°F | 46.2°F | cold |
| Water temperature in Winnetka in December | ||||
Chart monthly average water temperature in Winnetka
