Hello "jimbo", maybe I can help a little. I have done four Mexican cruises, two of them in winter. One in Jan. , one in Feb. You will find the weather nice and warm once you are south of San Diego. There is an area where the cold water of the california coast meets the warm water off mexico that can get a little bumpy, but no big deal. At that time of year, the weather for California comes from the gulf of Alaska. If there happens to be one of those storms when you leave, it could be pretty choppy, but I think you should be fine.