San Francisco is my hometown.

Like most tourists, you should go to Golden Gate Park, walk the Golden Gate Bridge, and of course, see all of the history in that amazing town (Museums, Piers, cultural areas, etc..)

It is a BEAUTIFUL city, and you are going at a great time. The fog should be not so prevalent, and it should be decently warm.

Give me an idea of what you like and I can help you a bit more...