In recent years, there has been considerable effort spent on determining what (if any) effect shoaling waves have on air-sea surface fluxes. This problem has two components: the effect of wave age on fluxes in the absence of swell, and the additional affect of swell. In both situations, a lack of field data combining coincident measurements of direct fluxes and directional wave data has hindered progress.
Here we present recent eddy correlation stress and coincident directional wave spectra from the Shoaling Waves (SHOWEX) field experiment. These data are used to address both aspects of the sea state dependence in shoaling waters. The data are also shown to support a significant dependence of momentum flux on the presence swell. This latter effect is important for low wind speeds ($U < 5$ m/s) and co-linear (or opposing) wind and swell.