I literally just got out of the water after giving the hull a de-barnacleing in the middle of winter, and I'm lucky enough to live somewhere where that's possible.
That said, pictures like this of cold water sailing fascinate me.
This was my first cold weather sail ever and I've been at it for a long time. I was worried and bought new foulies, new socks, and big down-filled over-mittens. The HH ocean jacket and those mittens saved me when we crossed down the Norway.