World sea water temperatures

Water temperature in Wilmette (IL) in May

Is it warm enough to swim in Wilmette in May? Average water temperature in Wilmette in May is 50.4°F and therefore is not suitable for comfortable swimming. The warmest water in Wilmette in May is 63.7°F, and the coldest is 42.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Wilmette

Changes water temperature in Wilmette in May 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
May 149.1°F44.2°F42.1°F49.1°F
May 250°F45.1°F43.3°F50.2°F
May 349.6°F47.5°F43.2°F51.3°F
May 449.1°F48.2°F44.2°F53.1°F
May 548.7°F50.2°F43.9°F53.4°F
May 649.6°F52°F43.9°F54.1°F
May 750.4°F54.3°F44.4°F54.3°F
May 850.4°F54.9°F45°F54.9°F
May 950.4°F55.4°F45.7°F57.4°F
May 1050.9°F54.9°F45.7°F57°F
May 1151.1°F55.6°F44.8°F55.6°F
May 1251.4°F55°F45°F55°F
May 1350.4°F56.1°F45.1°F56.1°F
May 1450°F55.6°F45.9°F55.6°F
May 1549.8°F55°F46.2°F55°F
Day 2025 2024 Min Max
May 1652.3°F54.5°F46.4°F55.2°F
May 1751.4°F54.9°F46.2°F54.9°F
May 1853.1°F57.6°F45.9°F57.6°F
May 1954.1°F57.9°F46.4°F57.9°F
May 2053.4°F58.1°F45.9°F58.1°F
May 2153.1°F58.8°F46.2°F58.8°F
May 2250.7°F58.8°F46.6°F58.8°F
May 2351.4°F59.4°F48.4°F59.4°F
May 2451.3°F58.5°F48.7°F58.5°F
May 2552.3°F59.5°F48.4°F59.5°F
May 2653.8°F58.6°F48.7°F62.1°F
May 2753.1°F57.4°F48.7°F63.5°F
May 2852.3°F60.6°F48.7°F63.5°F
May 2952.5°F59°F48.9°F62.8°F
May 3054.3°F57.9°F48.6°F62.4°F
May 3155.4°F58.3°F48.9°F63.7°F
Wilmette water temp chart in May

Average water temperature in Wilmette in May over a decade

20162017201820192020
48.6°F48.2°F50.7°F50.5°F47.3°F
20212022202320242025
52.9°F51.1°F50.4°F55.2°F51.4°F

Wilmette sea state in May

Chart comparing the height of waves in Wilmette in May 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 Wilmette in May

Wilmette 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 in Lake Michigan in May

Where is the warm sea water in May?

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

AvrMinMax
Winnetka50.7°F42.3°F63.7°F
Glencoe50.2°F41.9°F62.8°F
Evanston50.2°F42.3°F64.2°F
Rogers Park50.2°F42.3°F64.2°F
Montrose Beach50.7°F42.6°F64.8°F
Foster Beach50.7°F42.6°F64.8°F
Highland Park49.8°F41.5°F61.5°F
Lake Forest49.3°F41.4°F60.4°F
Oak Street Beach51.8°F43.7°F65.7°F
North Avenue Beach51.8°F43.7°F65.7°F

Illinois photo gallery

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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 Wilmette 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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