Think your pooch is so talented because she can catch a Frisbee with her mouth? Prepare to be humbled this Saturday from 9am to 2pm at the 2nd Annual Dog Surfing World Championship at Linda Mar Beach in Pacifica. A kennel full of breeds from dachshund to lab will be riding the waves, either solo, tandem with another dog or a homo sapien. Free. For even wilder rides head out to the Berkeley Marina this Friday and Saturday afternoon and applaud the airborne contestants at the 2017 US National Windsurfing Festival, tacking their way across the Bay’s stiff summer marine breezes. Free.