Leaving out of Los Angeles it all depends on the weather. It is in the 70s in LA right now, so a cruise could probably be nice & warm, but you are only going to Ensenada and maybe Catalina, so it is hard to say.
You are not really leaving the same climatological area as California. - Check the weather for San Diego or Tijuana ahead of time and it should tell you.
I am the editor, but I also speculate, ask questions and play devil's advocate. I reserve the right to change my mind.