Visiting a friend in Seattle early August and have a few days to fish. Can anybody point me in the right direction? I'm looking to fish for trout, preferably in smaller water.

Seattle is basically a giant metropolitan region of Washington. There are a ton of good rivers all around that area so it depends where in or around Seattle you'll be. I'm not familiar with the city side of Pudget Sound so I cant point you to anywhere specific, but any of those rivers should be excellent fishing. The PNW is a fly fishing paradise, just make sure you have a good roll cast.