By leveraging the unique regional refinement capabilities of the Energy Exascale Earth System Model (E3SM), applications  of E3SM to coastal problems span across most components of the model and across numerous DOE funded projects.  New modeling capabilities have become available to the DOE community (e.g. tide capabilities, benthic BGC, unified earth surface meshes) and many more are under active development.  In this work we provide a brief overview of capabilities that are available to the DOE coastal research community that resulted from numerous DOE projects (e.g. E3SM, ICoM, InteRFACE, SciDAC) and discuss a sample of capabilities that are being developed in these same projects and a few new start projects (e.g. DOE Early Career projects), including water isotope and numerical tracers in the coupled system, a new river model, two-way coupling between E3SM’s land, river, and ocean components, and river transport of nutrients and sediments. Ultimately, the goal of these developments is to strengthen E3SM's ability to provide actionable science for DOE mission needs by linking changes in climate with evolving coastal risks due to extremes.