Earlier quoted context omitted.
Winter surfing in January/February in -20C (-4F) is a thing in my region.
I know two guys who surf on Lake Michigan and Superior. They mostly go in the late Fall/early Winter because the waves are bigger, but the water is absolutely freezing.
Ice Balls
https://www.pinterest.com/pin/563161128374171906/
Unnavigable Surf(Lake Erie)
http://www.cbc.ca/news/canada/windsor/photographer-dave-sand...
edit: need a thesaurus