A computer model for the computation of refraction of ocean directional wave spectra has been developed. The model is applied to wave propagation through a circular current whirl. Both refraction diagrams and computed directional wave spectra are presented. Wave heights are computed for points outside the whirl. Relative changes in wave heights are found to be within ¿20%. The computations reveal two areas of crossing seas on the lee side of the whirl. Between these areas is an area of reduced wave heights and nearly unidirectional waves. ¿American Geophysical Union 1987