See above. The low pressure systems coming down from the Gulf of Alaska
can really hammer the West Coast
. You can avoid the worst of them by sailing into the area of the Pacific High, but then you need to motor
for many days to get through that. Once through, you have to bash north into the remnants of these lows, and the prevailing northerlies. Otherwise you sail north, around the top of the High, then west to the Strait of Juan de Fuca. The problem with that plan is you are likely to encounter hurricane-force lows
as they sweep over and around the high and towards the coast.
There is no forecast
that will be accurate enough to let you avoid these lows -- the whole trip will take 2 or 3 weeks (or more) and you are vulnerable for the entire second half of it. The best you can do is to run and hide inside the Pac High if you see a really bad low approaching. And then you're many miles and days off-course with that painful northward slog to get through.
Or you could get lucky. I wouldn't depend on that happening though.