The man behind the WaveCastr surf forecasts at WetSand.com, Nathan Todd Cool, takes surf forecasting one step further, showing how you can make surf forecasts with simple calculations and free, publicly available data. The WetSand WaveCastr Guide to Surf Forecasting explains in easy to understand terms the science behind waves, winds, water temperatures, tidal swings, and more. Learn how to predict when swells will arrive, how big waves will be, and telltale signs of common hazards. Find out how to predict winds, forecast temperature fluctuations, and foresee anomalies like upwelling, and coastal eddies. Discover how to track tropical cyclones and how seasonal phenomena affect them. A first of its kind, this informative resource will lead you from start to finish through the steps necessary to make surf forecasts, and refine them over time. Written for both the novice and experienced water sport enthusiast, this book is truly a must-have for those who love to participate with the power of the ocean.