I would say the walleye bite usually tapers off around the first week in August.That is when most guys switch over to perch.The reason the walleye bite tapers off,is the water temp increases to point that they seek out the deepest colder water and become more lathergic.The schools of walleye that are out by Astabula now will start migrating back west as the water cools.That may take some time till they reach Huron though.There used to be good fishing around Huron in October,but recently the fishing didn't get good till mid November last year.They used to have a big,popular walleye tournament in early October.The last two years,bad weather and poor fishing made them not having the tourney this year.