Just a footnote to Brenda's posts.
A friend was a California delivery skipper who delivered many, many boats from Hawaii to various CAL ports, especially after the Trans-Pac races, and she said the only relatively painless way to get back was to go far north, as high as Oregon or Washington, before turning and reaching south to California. Since many (most?) catamarans do not go to weather very well, you should consider researching the route carefully.
Please do lots of weather research before, and you might find LATITUDE38 MAG
on line or the print edition in just about all California chandleries, to be very helpful.
I find GRIB files very helpful, here's a link to downloads of files onto your computer: GRIB.US