The size of waves on the Great Lakes can indeed reach significant heights comparable to those found on the ocean, although there are some important distinctions to consider.
The Great Lakes, being freshwater bodies, generally experience shorter and steeper waves compared to the ocean. This is due to differences in the density and salinity of the water. The average significant wave heights on the Great Lakes range from about 2 to 6 feet (0.6 to 1.8 meters), but they can occasionally exceed 20 feet (6 meters) during severe storms or under specific weather conditions.
While these wave heights may not typically match the towering swells commonly associated with the open ocean, they can still be powerful and pose risks to boaters, swimmers, and shoreline infrastructure. The relatively shallow depth of the Great Lakes also contributes to the formation of shorter and more turbulent waves.
It's worth noting that Lake Superior, the largest and deepest of the Great Lakes, tends to experience the most significant wave heights due to its size and exposure to strong winds. In contrast, the smaller lakes like Lake Erie and Lake Ontario may have comparatively smaller waves.
In summary, while the Great Lakes can produce substantial waves that are comparable in size to ocean waves, there are differences in their characteristics due to the freshwater nature and shallower depths of the lakes.