Yes sir, it is such a level of realism that we are talking about here. Of course, other than the fact that Geralt’s beard will grow over the course of time, developer CD Projekt also has their fair share of surprises for interested gamers. CD Projekt’s communications chief, Michał Platkow-Gilewski, shared more on Geralt’s beard, “The beard grows as time passes and when Geralt moves between locations. The beard has several “states” and these states determine its length – the longest is really long but it’s not Gandalf-long.”
Do bear in mind that it is not a lovely pair of scissors that stop the growth of Geralt’s beard, but rather the application of Witcher 3’s free Beard and Hairstyle DLC.