The proposed paper seeks to utilize the Melnikov broaching prediction methods developed for prediction in regular seas and apply them to irregular seaways in a multi-fidelity approach. The Irregular Wave Melnikov (IWM) method initially identifies points of potential instability through the inception of high-run. Then, a snapshot of the irregular wave profile along the ship’s hull is taken. A regular wave is fit to this irregular wave snapshot and the parameters of the regular wave are then used to perform a Melnikov analysis. The result of the Melnikov analysis to this regular wave fit can provide a physics-based complement to the identified periods of high-run which could aid in broaching prediction. At the current stage of development, the IWM method has achieved a broaching identification accuracy of about 70% in irregular seas.