Not much for woodworking stores in San Diego.
The San Diego Rockler store is good, but is about the same or slightly smaller as the one in Denver.
Two stores, Frost Hardwood Lumber and The Hardwoods & Hardware (TH&H), have a basic inventory of Festool. Neither had a demo area the last time I was there. They both hosted the Festool roadshow about a year ago. First and foremost, they are hardwood lumber suppliers.
The only local source of high-end tools was The Craftsman Studio. However, the owner retired two years ago and sold the business. The new owner moved the storefront to Washington state.
Other than that, I would go to the Balboa Park museums, the zoo, Safari Park, tour the USS Midway or take a harbor cruise.