In this paper, we introduce the novel notion of a relative Bridgeland stability condition, in the context of a wrapped Fukaya category of a marked surface with respect to part of its boundary. This construction can be shown to have nice functorial properties and behave well under certain decompositions of surfaces. We use this method to reduce the calculation of stability conditions on the Fukaya category of any fully stopped surface into simpler cases, and in particular we show that any stability condition on such a category is of the type described by Haiden, Katzarkov and Kontsevich, ie. given by the structure of a flat surface; there are no exotic non-geometric stability conditions.