Swimming is a my favorite physical sport, so it's great that I can surf with just my body.
What's holding you back? Jump in and have some fun!
Caution! Wetsuit may be required. I've got to move to a warmer climate.
sidenote: For the European readership. Even though San Francisco is at latitude 37 46 00 N, roughly the same as Marsala, Sicily or Cartagena, Spain, the ocean is cold. The California current (surface current) brings water down from Alaska. Brrrrr.