Don't go too far as there's the picturesque Lombard Street nearby that is worth visiting for some great pictures.

Want to see sea lions in the wild? Come to Pier 39. They are always there. Watch out for the angry ones!
The sea lions camped out in PIER 39’s West Marina have been endearingly coined The PIER’s “Sea Lebrities.” The boisterous pinnipeds started arriving in droves in January 1990, shortly after the 1989 Loma Prieta earthquake. At first, they numbered from 10-50, but due to a plentiful herring supply, available dock space and the marina’s protected environment, the population grew to more than 300 within a few months.
Each winter, the population can increase up to 900 sea lions, most of which are male. During the summer months, the sea lions migrate south to the Channel Islands for the breeding season, but in recent years a small group stays year-round at PIER 39’s K-Dock.