Bainbridge Island now boasts six small, artisanal wineries. Four use grapes grown in the warm climate of eastern Washington, while two grow grapes right here on Bainbridge, in the cool climate of Puget Sound. Since the wineries are small and owner-operated, they are only all open for tasting at the wineries on select weekends (though some are open additional days as well). Upcoming open weekends include: May 23-25, July 11/12, August 8/9. Hours are 12 - 5, and tastings are cheap or free. More to come!
Three of the wineries also operate tasting rooms that are located within walking distance of the ferry terminal: Eagle Harbor Wine Company and Eleven (these two share a tasting room, open Wed - Sun 12-5) and Victor Alexander (Open Thu - Sun 1-6).
And here's a map showing all the locations.
Note: these maps may not get you all the way to the winery in all cases. When the wineries are open, there will be signs directing you to the exact locations.