Check out this video by Thomas Patterson. It's lively out there! I was surprised to find out that it was just off Alki Point in Seattle. Looks like a real blast! I guess we really do get some waves out there sometimes. But no matter how hard and long the wind blows here in the South Sound the waves don't seem to get over a couple feet. A coworker once told me she and her husband encountered 8 ft waves coming out of Quartermaster Harbor just across the channel in Vashon Island. She said their sailboat was knocked down so hard that they came up with seaweed hanging off the masthead. Yeah, right! A quick look at Bowditch online suggests that that could only happen in a gale. And then what the hell are you doing out there sailing in the first place?!
The area just west of Seattle benefits from a 15-20 mile fetch when the wind is blowing from the south. I'm guessing that if you wanted to catch some waves locally you would paddle out farther north just west of Discovery Park, after it's been really blowing for a day. I'll make a note to try that someday.
I found a whole cache of Thomas Patterson's videos following a link in a message posted on the SKSB-NW message forum. Take a look.