BillD is correct.
In most but not all deep non-bottom aerated ponds in central and northern regions, mid-summer bottom water temperatures in these deep ponds is commonly 50F-55F. In very deep lakes the bottom water can be close to 39F-40F year round. Very deep lakes can be unique. Most water bodies completely mix twice a year, some only once a year and a few of the deepest lakes or smaller deep ones with very little wind action never or very rarely completely mix top to bottom. These types of lakes have special limnological names.
Last edited by Bill Cody; 12/01/19 04:31 PM.
