I used to fish the surf near San Diego when I would visit my parents in the area. Used a 7 weight rod with a 225 grain sink tip line. Flies should also be heavily weighted. Many fly patterns include orange to suggest the roe of the sand crabs that the perch feed on. Here is a good article on fly patterns that will give you some ideas.

There used to be a really good website, www.fliflicker.com, which had a great forum and a collection of fly pattern articles, but it seems to have vanished. You might try searching it with the "wayback machine" to see if you can unearth some of its information.