I think it depends a lot, on a lot of factors, but the short answer is yes, probably. I have a wirehair and unlike labs or Chessies, their coats are far from "standardized;" I've seen them totally indistinguishable from Shorthairs, complete with short, thin hair, to those that are apparently "slick" but actually have thick double coats just without furnishings, and wooly mammoths and everything in between. Mine has really long hair and is shaggy enough to be mistaken for a Griff but he doesn't have super thick hair.
Also, whether or not you can get the dog dry, and where you have the dog sitting (a boat with an unfinished metal floor is a lot colder than a boat with a flat floor,) your access to a heater, etc...I know one DD owner that glued a sheet of pink foam insulation on the bottom of his kayak where his dog sits and throws a bathmat on top of it.
Also, check what the water temp is. I went out on a day when it was in the low teens and was surprised to see my dog walking into the water pretty nonchalantly...I went to pick up the dekes and the water was probably 55 or 60 degrees, despite the ice forming over smaller ponds.