World sea water temperatures

Water temperature in Ephraim (WI) in May

Is it warm enough to swim in Ephraim in May? Average water temperature in Ephraim in May is 43°F and therefore is not suitable for comfortable swimming. The warmest water in Ephraim in May is 54.3°F, and the coldest is 35.8°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Ephraim

Changes water temperature in Ephraim in May 2025, 2024

To get an accurate forecast for the water temperature in Ephraim for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Ephraim, 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 142.1°F43.7°F36.3°F43.7°F
May 241.5°F44.2°F36°F44.2°F
May 341.9°F47.7°F36.3°F47.7°F
May 443.5°F45.9°F37.6°F45.9°F
May 544.4°F45.9°F35.8°F45.9°F
May 642.6°F46.8°F36.3°F46.8°F
May 745.3°F46.2°F36.3°F46.2°F
May 845.1°F48°F37.2°F48°F
May 945.5°F46.8°F36.3°F46.8°F
May 1045.5°F46.6°F37.2°F46.6°F
May 1146°F48°F37.4°F48°F
May 1247.8°F47.8°F35.8°F47.8°F
May 1343.5°F49.6°F35.8°F49.6°F
May 1443°F48.4°F37.4°F48.7°F
May 1542.8°F47.5°F36.1°F47.5°F
Day 2025 2024 Min Max
May 1640.6°F46.9°F36.7°F46.9°F
May 1741.5°F45.5°F36.7°F46°F
May 1841.9°F48.6°F37°F48.6°F
May 1942.8°F51.1°F37.8°F51.1°F
May 2042.1°F50.2°F39.7°F50.2°F
May 2142.4°F51.4°F40.5°F51.4°F
May 2245°F51.8°F39.9°F51.8°F
May 2345.5°F50.5°F40.1°F50.5°F
May 2443.7°F49.1°F40.8°F50.2°F
May 2546.4°F50.9°F40.1°F50.9°F
May 2648.7°F50.4°F41°F50.4°F
May 2748.2°F50°F41.4°F50.5°F
May 2847.3°F50°F41.4°F50°F
May 2946.8°F50°F42.1°F51.3°F
May 3048.6°F54.3°F41.9°F54.3°F
May 3149.1°F52.2°F42.6°F52.2°F
Ephraim water temp chart in May

Average water temperature in Ephraim in May over a decade

20162017201820192020
44.8°F42.1°F41.7°F41°F42.8°F
20212022202320242025
45.9°F41.9°F40.3°F48.6°F44.6°F

Ephraim sea state in May

Chart comparing the height of waves in Ephraim 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 Ephraim in May

Ephraim water temperature during other months:

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

Temperatura da água do Lago 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
Ellison Bay43°F35.4°F54.7°F
Rowleys Bay42.4°F35.4°F53.8°F
Jacksonport42.1°F34.7°F52.5°F
Whitefish Dunes41.7°F34.3°F52.5°F
Cave Point41.7°F34.3°F52.5°F
Cedar River44.6°F32.9°F57.6°F
Marinette47.1°F35.4°F58.3°F
Washington Island41.2°F35.1°F53.8°F
Sturgeon Bay43.2°F33.8°F52.5°F
Oconto50.7°F37.2°F64.6°F

Wisconsin 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 Ephraim 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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