Follow this link to get daily temperature readings of Lake Michigan around the Manitowoc area, and across the lake in Ludington and Pentwater, MI.
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 90s for many continuous days.
If Lake Michigan is still too chilly for your taste, head to the warmer inland waters of Lake Winnebago. Since it's smaller, it tends to warm more quickly than Lake Michigan.
Our beaches are some of the nicest and cleanest you'll find anywhere. You can choose whether or not to join the crowds at the highly populated spots---or find a private beach that's less busy. Sunning, swimming, or building that special sand castle--Wisconsin beaches offer it all!