Left Hammond, Indiana on May 31st last year and traveled to the Mackinac straights. We anchored out or stayed at free docks, the water
temp was 34f to 37f we needed a little heat but no air conditioning
. Your trip is going to be about 3 weeks later but I can't imagine the water
warming up enough to need AC at night. During the day open up the boat and get the air circulating if the sun is warming it.
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