From one stranded so.cal boater to an othe you basically have two choices 1) drive pretty far north for some winter boating or 2)get your fix in ocean and wait for spring. Kernville, the kern river in general is awsome, but not untill the spring. The river has everything 1-6 a few creeks that feed into it (brush creek being my favorite) and it even has an oldschool play park. The Kings River and the Kaweah aren't that bad a drive either, but not untill spring. As for the ocean, if you are in O.C. try surfing San Onofre. It is a state beach, so you have to pay to get in, but there is a section of the beach just for kayaking. Head to the very southern most section where the parking lot ends and surf to your hearts content. It is right in front of the huge nuclear power plant (no joke) you can't miss it. I'm a bit of a river snob myself and but the ocean can be alot of fun.
drop a line if you ever want to go play in the surf email@example.com