A familiar debate in the philosophy of sport concerns the question of whether fans should seek to be partisans (those who support particular teams or individuals) or whether they should instead adopt the impartial attitude of the purist. More recently, Kyle Fruh et al. have argued in defense of fair-weather fandom, which they understand as a form of fandom that involves adopting temporary allegiances in response to non-sporting considerations. This paper will add a new form of fandom to this discussion: (...) the foul-weather fan. While fair-weather fans adopt temporary allegiances or strengthen existing allegiances for teams when things are going well, foul-weather fans do so when things are going badly. We will argue that foul-weather fandom can be both instrumentally valuable, as it helps to protect valuable sporting institutions, and non-instrumentally valuable, as these fans display concern, empathy, or support for sporting individuals or teams that are going through tough times. We finish by discussing how a specific form of foul-weather fandom may be associated with a distinctive moral danger in putting people in positions where they may become complicit in a club’s immorality. (shrink)