Great Lakes Still Very CoolAugust 3rd, 2014 at 9:20 pm by Bill Steffen under Bill's Blog, Weather
This graph (from NOAA Coastwatch) shows the water temperature of Lake Michigan for the past 5 1/2 years. This is the coldest that we have seen Lake Michigan in August in recent years. The average surface water temperature of Lake Michigan is roughly 11° F cooler than it was in the first week of August in 2012. You can check out the temperature graph for Lake Superior (which looks to be about 15° cooler than 2012), Lake Huron, Lake Erie and Lake Ontario. Here’s the current Lake Michigan beach water temperatures.