Hi Texasman,
Dolphins are sighted all along the coast of San Pedro from time to time. The beaches I frequent are down south. The dolphins probably chase the predatory fish that chase sardines and certainly I normally saw dolphins when sardines were plentiful.
Dolphins seem to know exactly when you need to see them though, so predictions are very difficult. Most of my sightings have been early in the morning.
If you go on any tours or boat outings you may see them too. It is so exciting to have a pod of dolphins swim along side your boat. Good luck and have a wonderful time.