What climate change. I'm still waiting for it to get warm enough to go swimming here in Kona.
Pilot charts are historical data collected over more than a century. They tell you what you might expect to get not what you'll get. Forecasting is pretty good for bad weather along the coast so should have plenty of warning to duck in along the coast or head
offshore. In the winter, the lows come through with significant regularity. Doubt you'd get much more than 5 days of consistant good sailing weather so would probably have to duck in at least once on the passage
and quite possibly more often. The bars in the harbor/river entrances are not to be be trifled with. If you think you are going to want run and hide, do it right now. Once the waves hit, crossing the bar is life threatening in a big way. Summer has little incidence of truly bad weather. But the bad winter weather coming in off the Pacific hits with great regularity into April. Don't expect to be warm for any part of the trip. There is precious little difference in the temperature off the California
Coast in June than January. You will have more chance of getting southerly winds through March than anytime till the following January. A few years ago when I delivered my boat up from Santa Cruz
to Alameda, the winds blew out of the south for more than two weeks in March.