Average annual water temperature on the coast in Lake Michigan is 48°F, by the seasons: in winter 38°F, in spring 38°F, in summer 62°F, in autumn 54°F.
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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.
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.
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.
It is always more risky to swim in one of the Great Lakes, Lake Michigan has the best beaches, can get “warm” [low to mid 70s] in July and August and even stay that way for a couple of weeks in September, so it is Great Lake that is often swum in. However, it also accounts for the most drownings.
When the lake is deep, and the angle of incoming light is smaller, Lake Michigan's color appears deep blue. This is because the light travels down with little obstructions and dissipates far below the surface. The light then appears darker in the visible spectrum.
Erie is the most southerly, shallow, and biologically diverse of all of the Great Lakes. Its shallow depth makes it the warmest Great Lake and a favourite destination for summer recreationists and migrating birds.
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.
Lower Michigan is surrounded by water on the north, east and west. Any wind from those directions will blow air over the water and then over Lower Michigan. The cold water will cool the air and keep us in a chill. It's a nice cooling effect on a hot summer day, but it's a frigid effect in April and May.
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.
Lake Michigan has the longest stretch from north to south of all the Great Lakes, giving it a very diverse climate, which allows for a wide variety of plant and animal species. The lake boasts a variety of natural habitats, including tallgrass prairies, wide savannas, and the world's largest freshwater sand dunes.
The blue in Lake Michigan and Lake Huron is sediment brought to the surface when strong winds churned the lakes. The green in Lake Erie and in Lake Huron's Saginaw Bay is algae, which builds on the surface when winds are calm.
Lake Michigan: No more than 1 MI serving per month. Portage Lake in Houghton County: No more than 2 MI servings per month. Gull Lake in Kalamazoo County: No more than 2 MI servings per month. Higgins Lake in Roscommon County: No more than 4 MI servings per month.
Swift Currents At Lake Michigan Are The Real DangerThe shapes of these waves are what contribute to rip tides, which are one of the most dangerous things swimmers can encounter in the water. Lake Michigan's riptide and longshore tides are unparalleled when it comes to danger among all the Great Lakes.
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.