Hi Powerkiter, As far as I'm aware, Fish feed all the time. In cold weather and cold snaps, fish will still take a fly.
Yesterday, at Ellerdine Lakes in Shropshire, I had one fish in four hours. I'd missed two takes, though these were lightning fast. The fish here are taking fry patterns in white and green, they are also hitting Orange??
Prep yourself for the cold, lots of layers, so if you get too hot you can take a layer off. If you don't have enough layers on, you'll soon find out though, freezing your n@ts off.
Enjoy the day and get out there.
Regards
Stuart