DUDE, there is SOOOOO much weed in San Diego... You don't need to ask here.... go down to PB and just start hitting up random hippies on the boardwalk.
I knew of at least 50 different connects when I lived there. Just head down to fallbrook, head out into the avocado groves and wait for a mexican to pop out of the bushes with a giant brown paper bag full of weed.
You shouldnt have a problem finding weed there, everyone smoke weed there. =)
PS .... No, I'm not giving ya any of my old connects when I lived there, so please don't ask, this site is for growing, not for the sale of it! =)