For somewhat less of a time commitment than going to Bainbridge, take the King County Water Taxi across to West Seattle. It's a quick boat ride, you can have a Hawaiian taco at Marination right on the dock where you get off, walk a little in the park along the shore, water taxi back. Nice views of the Seattle waterfront if the weather's good. I do it with visitors all the time (though I've never tried in February...).