Abstract: This article deals with ocean currents and storm surges in a shallow sea from the point of view of atmosphere-ocean interaction.With ignoring heat transfer at the air-sea interface,a four layer quasi-balanced dynamical model for a satisfactory simulation of the structure of atmospheric and oceanic planetary layers is proposed.The velocity structures of both atmospheric and oceanic planetary boundary layers are obtained by an analytical approach.In addition,a formula to calculate the surface wind at sea is derived and discussed briefly.Based on the ocean current profiles thus obtained,an equation for numerical prediction of shallow water storm surges is separately given,in which physical factors such as baroclinity of atmosphere,roughness of sea surface,bottom configuration and dependences of coefficients of eddy viscosity in both fluid mediums upon the height or the depth are taken into account.The equation may be solved numerically under appropriate lateral boundary conditions and initial conditions,if the observed or the predicted air pressure and temperature over the Sea and the surface water temperature as well as other physical parameters are known.