Predicting tropical cyclone structure and evolution remains challenging. Particularly, the surface wave interactions with the
continental shelf and their impact on tropical cyclones have received very little attention. Through a series of state-of-the-art
high-resolution, fully-coupled ocean-wave and atmosphere-ocean-wave experiments, we show here, for the first time, that
in presence of continental shelf waves can cause substantial cooling of the sea surface. Through whitecapping there is a
transfer of momentum from the surface which drives deeper vertical mixing. It is the waves and not just the wind which become
the major driver of stratified coastal ocean ahead-of-cyclone cooling. In the fully-coupled atmosphere-ocean-wave model a
negative feedback is found. The maximum wind speed is weaker and the damaging footprint area of hurricane-force winds is
reduced by up to 50% due to the strong wave induced ocean cooling ahead. Including wave-ocean coupling is important to
improve land falling tropical cyclone intensity predictions for the highly populated and vulnerable coasts.