What makes Southern California so special is the sheer variety of waves, in a days drive you can go from heavy beach breaks down near the Mexican boarder, drive through the bustle of LA and get spat out the other side into a land of perfect point breaks.
It’s impossible to generalise wave wise but you can roughly split the area up, although all sorts of waves exist in all the areas. From Santa Barbara to Malibu there are some classic point breaks, Rincon and Malibu being the most famous. Then generally speaking in LA it’s all about beach breaks, some of them classic.
Then heading south there are some classic reefs, Trestles being the most famous, and those around San Diego, are world famous. The southern end also gets a lot more of the classic southern hemisphere swells so is the place to base yourself in the summer season.