In this paper, we will study the influence of nonlinear waves (breaking waves) on the EM signature (X-band) of a sea surface in bistatic case (forward propagation). Indeed, we will start the temporal numerical analysis of the scattering coefficient σHH of breaking waves in low-grazing-angle. Then we will explain in details the different scattering mechanism of breaking waves. In this work, we will consider the sea surface as a perfect conductor.