The EASY project aims to build a Polycentric Infrastructure for operational coastal modelling, generating information on the weather conditions, wave climate and surface currents and downscale it to the local scale where end-users need it. The main contribution of this project is for Maritime Security by providing forecasts for meteorology, ocean currents and wave height both at regional and local scales, allowing the end-user to interact directly with the system and not just to obtain standard information. Another contribution is for coastal management, including protection of shore infrastructures and bathing water quality forecasting. The technology necessary for building such a system is already available in the countries of the Atlantic Arc, but is spread for various countries and institutions. The Polycentric Infrastructure proposed will combine those technologies creating added value. The Mercator Ocean is running a model for the whole world forecasting the circulation – currents, levels, temperature and salinity – and assimilating field data – levels and temperatures- every week. MOHID model has been applied off the Iberian coast forced by results of Mercator and by results of the Meteorological model run by MeteoGalicia for producing results at regional and local scales. In order to add value, INTECMAR will use the local models in real cases, pointing out the needs and lacks as well the improvements and success.