I think the jacket is probably fine even if it might be kind of a dated cut. Kinda hard to evaluate fit with the wonkily cropped photos. Always better to have a full body shot taken straight on if you're looking for fit advice.
besides that, I think tweed is sort of a fish out of water in OC. tweed seems like such a cold climate fabric to me. I'm from NB, btw. I think you should look into cotton or linen sport coats for more of a dandy-surfer vibe.