Can't comment much on Windy's accuracy in SEAK's narrower channels (especially odd spots like Lincoln Rock), but for me and friends it has been excellent for the outside, and for crossing the Dixon.
Its very granular forecast is so much more useful than NOAA's area forecasts - enabling us to make correct go-nogo decisions in weather that sounded very iffy on NOAA. I find it very good in BC as well.
Predictwind is similarly good in my experience.
Dream Catcher (Nordic Tug 37-065) Poulsbo WA
Previously: New Moon (Bounty 257), Cindy Sea (C-Dory 22 Cruiser)
"Cruising in a Big Way"