Surprisingly few large boats are winterized on the hard in the Pacific Northwest, as is standard practice in other areas where the water freezes (New England, the Great Lakes). We have the luxury of not having to; the relatively steady ~50 F water temperature prevents engines from freezing or harbors icing over. And we have the option of year-round sailing – although much of the winter is pretty rainy and dark, we always have some stretches of sunny, 45-55F weather (positively balmy!).
Yet there are some advantages to storing your boat on land (“on the hard”) – less bottom paint wear, no dock line chafe, etc. So this year we went this route, given we’re traveling for the winter and won’t be able to use our boat. Debating the pros/cons of storing in the water vs on the hard, it was hard to find much information specific to the PNW.
Even though many boats never leave the dock in the winter, their owners still choose to leave them in the water, paying significantly higher moorage costs. This is perplexing, but I guess it boils down to convenience – it takes a bit of work to winterize a boat, and there isn’t a huge surplus of winter storage yards in the Seattle area.