A coastal erosion study involving detailed modelling of the nearshore reef systems protecting the Torres Strait Islands. The project used detailed XBeach modelling to simulate different reef and dune schematisations. Coral reefs were schematised in XBeach using a varying bed roughness, with parametres to represent friction flow and wave dissipation coefficients. Each island type was modelled for 1 in 25, 100 and 500-year return period storm event, which showed islands with small fringing reefs may have twice the impact of large storms than those with extensive systems.