Waveriders are being considered more and more as potential aerospace vehicles. There are several questions, however, regarding these configurations that must be answered before they can be considered viable designs. The most significant problems are related to aerothermal heating, propulsion integration, and off-design performance. This paper presents off-design performance predictions for two generic waveriders. The results are from a numerical method based on the nonlinear, inviscid Euler equations. Comparisons to experimental data are also shown.