The Seattle Bremerton ferry operates year round.
It's a commuter ferry, so it's big and beautiful. Upper deck is highly recommended in "weather." You can go outside and get the wind on your face or, if it's just too wet, there's an area at the front that is not-quite-outside (unheated, but sheltered from driving rain).
Think North Sea Ferry without the waves, and mountains both ahead and behind.
I have a long-time friend (since we were 16) in Bremerton, so let me know if you do go there.
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