I identify and then aim to resolve a tension between the psychological and existential conceptions of boredom. The dominant view in psychology is that boredom is an emotional state that is adaptive and self-regulatory. In contrast, in the philosophical phenomenological tradition, boredom is often considered as an existentially important mood. I leverage the predictive processing framework to offer an integrative account of boredom that allows us to resolve these tensions. This account explains the functional aspects of boredom-as-emotion in the psychological literature, offering a principled way of defining boredom’s function in terms of prediction-error-minimisation. However, mediated through predictive processing, we can also integrate the phenomenological view of boredom as a mood; in this light, boredom tracks our grip on the world – revealing a potentially fundamental (mis)attunement.