I was up at our cabin in Poe Valley, a few miles up the road from the campground in Poe Paddy....Penns was way to warm at that point to even think about fishing.....
here is the latest post from the guys at FFP. Just click on the streams link in the bottom left and then Penns Creek from there. http://flyfishersparadise.com/
Penn's got some much needed rain on Friday night 7/27 and fishing was good Saturday morning. I did not take a water temp - but it seemed like the creek was in fine shape - the nights have been relitively cool up there for now...