Buy George Benson's "Cruising the Northwest Coast". He did it in a modified Coronado 25. Stayed inshore and anchored out in hooks protected from the prevailing strong NW winds almost every night.
Play the weather
and be content to stay in harbor, inshore and/or motor
a lot. Winter is actually a good time to go north as there are many periods of southerly and/or light winds. Do have to be very cognizant of the weather as the Lows blow through on one to two week intervals and you don't want to be going north, or anywhere out there actually, when one hits. Also a lot of the anchorages
which are safe hide outs in Northerlies are untenable in southerly winds. I've made the trip down three times and North from Santa Cruz
to SF once. Two of the southerly trips in January/February had strong NWesterlies that I wouldn't want to be going the opposite direction in. That last trip south in March had strong NWesterlies forecast
for a week that forced me into Monterey with rigging
problems. And then had a week of no wind
so powered all the way to Oceanside there after. The sail up from Santa Cruz
to SF in March was in light southerly wind
window that lasted for three weeks.
For sailing the Pacific Coast in Winter YOU HAVE TO BE WILLING TO PLAY THE WEATHER AND STAY IN PORT IF CONDITiONS DICTATE. Last winter, not the one just ending, was a particularly bad year to be out there. Needed to get the boat in a new slip by the end of March. Waited for a good weather window for three months to get a decent 5 day forecast
. The Lows blew through one after another with only a couple of days, and sometimes no days, in between almost three months. T\A couple of years before alked with a couple in Seattle
heading to Alaska
from SoCal in a Tartan 43 in the winter. They said they had a great time mostly sailing in favorable winds. The T43 is particularly good sailor to windward, FWIW.