Not the most original choice but being a yooper I’m biased towards Lake Superior. It’s cold to swim in but you get used to it and it’s always clean and clear. There’s a lot of nice beaches in Marquette too.
There’s a Superior beach in the Keweenaw peninsula in particular that’s my favorite though. It has beautiful “singing sands” and is shallow so it’s usually warmer water and has a really nice turquoise hue, almost Caribbean-like. And hardly anyone is ever there, only locals really know about it.
Love Lake Superior, the natural beauty along the North Shore and around the Apostle Islands is unmatched by anything else in the region. Blessed to have spent so much time there in my youth.
Biased cuz of where I grew up, but Lake Michigan for sure. Yeah we got lake effect snow from the lake, but Lake Michigan also blocks severe weather from the Wisconsin/Illinois direction. Plus the land out by Lake Michigan is extremely lush, we're talking Fruit Ridge/other farming areas, but also all the woodland regions near the lake too -- most places within an hour of Lake Michigan are just gorgeous. And ofc the sand dunes, beaches, rivers connected to the lake, harbour towns, etc.