Quote:
Originally Posted by Acajack
I think it's pretty easy to find swimmable water that's as warm if not warmer in the Great Lakes in mid-summer than the ocean beaches are in, for example, Los Angeles County.
If we're talking the SE US then it's a different story.
But if the beaches of legend in LA are considered swimmable in the summer with the average temperatures there, then the Great Lakes are definitely swimmable too.
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Yeah, Lake Erie being the shallowest and southernmost is the warmest and is warmer than anywhere on the Pacific coast, and is just as warm and often warmer than the Atlantic off of New Jersey and anywhere north of there.
If the winter is mild and the Lake doesn't freeze, in a hot summer, the waters off of Presque Isle in PA get into the mid-80sF by late July to mid September.
Quote:
Originally Posted by Crawford
Yes, but this is misleading. The Great Lakes under discussion are not the swimmable Great Lakes.
Lake Erie, in particular, is very warm and swimmable much of the summer, but is easily the crappiest, least scenic and most polluted lake. The "pretty" Great Lakes (basically Lake Superior and northern third of Lake Michigan, and a bit of Lake Huron, arguably) as depicted in this thread are generally pretty cold.
As a general rule, you can have scenic Great Lakes, or you can have swimmable Great Lakes. Pretty rare to have both.
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This is 100% total —. If you're talking about swimming in Lake Erie near Toledo or somewhere, then sure, I wouldn't swim near where a swampy river enters a body of water either, unless I felt like having an algae bath. However, Toledo and Ohio do need to get their act together and stop poisoning their own drinking water.
But that is not true for most of Lake Erie. Lake Erie being so polluted is a notion that belongs back in the 1980s at best. Because it is the shallowest, it is certainly more susceptible to algal blooms (particularly on its western end where it is a vast shallow zone), but also because it is shallowest, it cycles its water MUCH faster than the other Lakes. Lake Erie
completely turns its water over every 25 years. Some large zones of the lake cycle their water within a couple months.
As you can see form the bathymetry map above, there is good reason why the waters in the western basin can easily become polluted. That's not the case for eastern Lake Erie. The water is remarkably clear and clean, owing in some part to the inudation of invasive zebra mussels that arrived in the 1990s, but also beacuse Cleveland stopped dumping their — (literally) and toxics into the Lake in the 70s and 80s.
I've taught an environmental health course to grad students specifically about Lake Erie water quality and advise the PA Sea Grant program on ecosystem/human health research. Plus, I'm an avid sailor, kayaker, and fisherman on Lake Erie and spend a significant portion of my life on Lake Erie. To suggest that it's not swimmable is not living in reality. 4-5M visitors per year to Presque Isle State Park wouldn't happen if Lake Erie was somehow crappy, polluted, and unswimmable.
100% total — hyperbolic Crawford post.