San Francisco’s only protected anchorage, closed to powerboats. Directly in front of Ghirardelli Square. $10 per night, need to book ahead online
Good holding; can get a bit crowded, The pier dampens the waves, but does not totally block them, so you get some wave action.
Be prepared to be disturbed by swimmers early in the morning. There have been reports of these swimmers being belligerent, but I have had no negative interactions.