Is 70 too cold for Lake Michigan?

How warm does Lake Michigan need to be to swim? The National Centers for Environmental Information and the National Oceanic and Atmospheric Administration says that 70 to 78 degrees Fahrenheit is the range where most folks feel 'comfortable' swimming.



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Though not as warm as the oceans, temperatures of Lake Michigan do rise to the high 60s in July and August to make swimming enjoyable, and definitely refreshing! Rarely do temperatures make it to the 70s, unless air temperatures stay up in the 90's for many continuous days.

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Lake Superior is the world's largest freshwater lake by area (31,700 mi2 /82,100 km2). It is also the coldest and deepest of the Great Lakes, with a maximum depth of 406 meters (1,332 feet).

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Those who brave the frigid feat and swim in the winter are nicknamed “ice monsters.” Lake Michigan continuously cools throughout winter, and with March averaging an annual low of 32.9 degrees, it's the chilliest month for open-water swimming.

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A north-northeast wind has pushed the warmer surface water along the Michigan shore back toward the middle of Lake Michigan and brought up colder water from well beneath the surface. This process is called upwelling.

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The National Centers for Environmental Information and the National Oceanic and Atmospheric Administration says that 70 to 78 degrees Fahrenheit is the range where most folks feel 'comfortable' swimming.

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According to the National Center for Cold Water Safety, water temperatures below 70 degrees Fahrenheit should be treated with caution. Water temperatures between 50 and 60 degrees Fahrenheit makes it difficult to control your breathing, and anything lower than 40 degrees is painfully cold.

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Use caution when swimming in Lake Michigan. The bottom is uneven with holes and deep drop-offs. These inshore holes are very dangerous to small children and non-swimmers. The only beach with lifeguards is West Beach.

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The answer is no. Being immersed in, rather than atop, cold water feels different. As fall turns into winter and the thermometer drops, the increasingly cold water starts to feel good, even warm. Wetsuits would only get in the way of this descent into conditions that have become delightful.

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About Harmful Bacteria coli in the water along Lake Michigan's shoreline is a strong indication that the water was recently contaminated by sewage or animal fecal waste. These wastes may contain many types of harmful disease-causing organisms.

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If you're ready to play in Lake Michigan, know that water temperatures can vary quite a bit along a stretch of coastline. In West Michigan, the beach near Duck Lake State Park in Muskegon County is warmest spot. The water temperature there is a balmy 70 degrees.

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For example, Lake Michigan takes most of the summer to heat up and reaches its warmest point by late summer or early fall. Then, as we head into winter, the lake retains much of the heat that it gained during the summer.

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Lake Michigan water temperatures Lake Michigan sees its warmest water temperatures typically from late-June through mid-September. It's not uncommon to have surface water temperatures in the 70s and sometimes even low 80s along the West Michigan lakeshore in that same time frame.

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According to Leinbach, Michigan's shores simply have science on their side. The winds generally go from west to east in this country, and that means that the warm water in the summer gets pushed to the Michigan side of the lake, he explained. So the water is warmer for swimming and playing and things like that.

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