How early is "early" on the 17th? From Palm Springs to the Los Angeles coast mid-week you are looking at probably a 2 hour drive. To La Jolla near San Diego add 30-45 minutes more. You could probably get in a shore dive or two locally (Laguna Beach, Palos Verdes, Malibu), but Calalina is an all day trip and you’d want to be on the first ferry to the island to make it worth your while. I’d be happy to try a shore dive that day if my work schedule wasn’t too hectic, but would probably have to make the final decision the day before. (sorry) If you could reschedule for the weekend your options will open up greatly.
Rich