Say hi to Matt Nelson, an awesomely crazy dude who likes to surf during the winter on Niagara's North Shore and the Great Lakes. As you can see, he gets icicles everywhere, including his eyelashes. You have to check out these videos of him and other silver surfers.
Coldest I ever surfed was 16 degrees (including windchill) in NY. We were filming a webshow and we needed to get this shot, and it was the only day when there was going to be any kind of waves. Despite a 5/3 wetsuit with hood, gloves, and booties, it was miserable. Couldn't feel my hands or feet after just a few minutes, and I got incredibly sick afterwards.
That said, I look at these guys with icicles in their eyes and I think, "That is fucking insane." I kneel to these guys.