The IWMO evolved from a small group meeting of the Princeton Ocean Model (POM) http://www.ccpo.odu.edu/POMWEB/, but it is open to the ocean modeling community at large. The IWMO focuses on all aspects of ocean and coupled air-wave-sea, ice and current-sediment modeling: processes, analysis and prediction. The earth system is inter-connected on a broad range of temporal and spatial scales, and we welcome coastal, regional and basin-scale studies, as well as interdisciplinary topics. As in the past workshops, we particularly encourage participation from young scientists – graduate students and postdocs – and will again host the Outstanding Young Scientist Awards competition. Attendants of IWMO2018 will be allowed to submit papers to a Special Issue of Ocean Dynamics.