Classical wind-driven coastal upwelling is predominantly associated with eastern boundary systems such as the California Current. Along western boundaries, however, an alternative and comparatively understudied mechanism, eddy–topography interaction (topostrophy), can drive significant coastal upwelling. This process typically does not penetrate the strongly stratified near-surface layer during summer, but it can substantially alter temperature and nutrient conditions within the benthic boundary layer. This phenomenon, recently termed “hidden” upwelling, is investigated using coastal ship-based and moored ADCP observations, complemented by measurements from a Wirewalker and a Slocum G3 Glider equipped with LADCP. The combined dataset indicates that eddy–topography interaction is the dominant driver of hidden upwelling along the Southeast Florida Shelf (SFS). Because coral reef benthic communities are highly sensitive to temperature variability and nutrient fluxes, these findings provide new insight into subsurface physical forcing of reef ecosystem variability and have direct implications for coral reef management on the SFS.