Hurricanes benefit wetland accretion by augmenting the delivery of mineral sediment, an essential process allowing marshes to offset submergence due to rising sea levels. Using Hurricane Gustav as a control, we examined eight synthetic storms with varying characteristics (track, speed, intensity, size) to evaluate sediment exchange between the inner shelf and the bay and bay-to-marsh interfaces. All storms showed net landward sediment transport from the inner shelf to the bay to the marsh—storms with closer proximity, higher intensity, and slower forward speed positively correlated with net sediment exchange; storm size had little impact. Except for very slow-moving storms, most scenarios cause net bay erosion as more sediment is conveyed to landward wetlands than is replenished from erosion of the inner shelf. This sediment deficit suggests a future deepening of the bay, which will worsen due to accelerating sea-level rise.