Although a variety of cross-shore wave transformation models have been developed during recent decades, there is a lack of suitable models that can be applied to soft mud beds offshore. To address this issue, an integrated cross-shore model is introduced. This model combines the effects of wave shoaling, energy dissipation within fluid mud, and wave breaking. The constitutive equations for a viscoelastic model are adopted for the rheological behavior of fluid mud, whereas stationary mud below fluid mud is assumed to be elastic. As part of the integrated model, submodels for mud fluidization and wave transformation are developed for regular waves and then extended to irregular waves. Application of the integrated model at selected sites using available data reveals that it can reasonably predict mud fluidization and associated wave height transformation.