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Water temperature in Winthrop Harbor (IL) in April

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Is it warm enough to swim in Winthrop Harbor in April? Average water temperature in Winthrop Harbor in April is 39.2°F and therefore is not suitable for comfortable swimming. The warmest water in Winthrop Harbor in April is 47.3°F, and the coldest is 32.7°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Winthrop Harbor

Changes water temperature in Winthrop Harbor in April 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 138.3°F39.2°F33.6°F41°F
April 238.1°F38.8°F32.7°F41.5°F
April 339.7°F39.2°F32.9°F40.6°F
April 439°F38.8°F33.1°F40.3°F
April 538.7°F39°F34°F40.8°F
April 639°F39.2°F33.6°F41.2°F
April 739.7°F39.4°F33.6°F41°F
April 839°F39.6°F34.3°F42.3°F
April 938.7°F39°F34.3°F41.7°F
April 1038.7°F40.3°F34.9°F41.2°F
April 1139°F40.1°F34.9°F41.7°F
April 1239.2°F39.7°F35.8°F42.3°F
April 1339°F40.8°F35.8°F43.9°F
April 1440.6°F42.6°F36°F44.8°F
April 1541°F42.4°F34.5°F45.1°F
Day 2025 2024 Min Max
April 1641°F43.9°F34.9°F43.9°F
April 1740.8°F43.3°F35.2°F43.3°F
April 1840.6°F42.4°F35.2°F43°F
April 1941.2°F42.6°F36.3°F42.6°F
April 2041.5°F42.8°F36.1°F42.8°F
April 2141.9°F43.3°F36°F43.3°F
April 2241.9°F43°F36°F43.5°F
April 2343.5°F45°F37°F45°F
April 2442.3°F44.1°F37.6°F44.1°F
April 2541.7°F44.4°F37.2°F44.4°F
April 2642.6°F45°F37.4°F45°F
April 2742.1°F44.6°F37.4°F44.6°F
April 2843.5°F46.8°F37.4°F46.8°F
April 2944.1°F47.3°F38.1°F47.3°F
April 3044.4°F46.4°F37.2°F46.4°F
Winthrop Harbor water temp chart in April

Average water temperature in Winthrop Harbor in April over a decade

20162017201820192020
39.4°F39°F36.9°F38.5°F39.6°F
20212022202320242025
40.6°F38.1°F41.5°F42.1°F40.6°F

Winthrop Harbor sea state in April

Chart comparing the height of waves in Winthrop Harbor in April 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 Winthrop Harbor in April

Winthrop Harbor 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 April

Where is the warm sea water in April?

Want to know where the water temperature in April 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 April. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Illinois Beach State Park39.4°F32.9°F46.6°F
Simmons Island Beach39°F32.7°F47.7°F
Tower Road Beach41.5°F34.5°F50.4°F
Glencoe41.5°F34.5°F50.4°F
Oak Creek39.6°F33.4°F46.2°F
Winnetka42.1°F34.7°F51.4°F
Wilmette41.7°F34.7°F50°F
Evanston41.7°F34.7°F48.9°F
Rogers Park41.7°F34.7°F48.9°F
Montrose Beach42.1°F34.9°F49.6°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 Winthrop Harbor 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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