Its hard to say, and it seems like it varies lake to lake. But I think if fish are up spawning shallow, they aren't going to run out deep because of a day or two of colder weather. I think it makes it tougher but you can still catch em. I was impressed with some of the fish I saw caught this past weekend despite a much worse cold front thank it looks like will be this weekend. If I could fish this weekend, I would.