The forecast data is fed by our own wave and weather API model called Swellcloud. Running 24/7 on supercomputers in the cloud and using a blend of Global, US and European public models giving you the latest tide times, swell, surf height, swell direction, period and energy combined to give you a surf quality rating system using colours and stars. 100s more spots to be added soon - let us know where you want us to build you a forecast.