The next few days are looking really good. Our weather has been known to change overnight, though. I would probably bring shorts, but also bring pants and a light jacket or sweater. You could check out www.theweathernetwork.com right before you come for a better idea.
Thank you everyone for your replys. I book marked the sites so I can check them during the week. We actually leave next Saturday and I hope the 80's hold out for the following week.
We are spending a week at Sherkston Shores. I hope it is a nice resort.
Just a note: if you like volkswagens, old new vintage and busses, there is a car rally at the falls on Sat 22 and a car show in the area Sun 23. There is a car rally for PT cruisers at the falls also on Sat 22