1) The document provides seasonal forecasts for autumn solar photovoltaic (PV) energy potential in key regions globally based on solar irradiance data from 1981-2011. 2) It identifies regions where solar irradiance is most abundant and variable, and where seasonal forecast skill is highest one month in advance, such as Spain, East Australia, and Indonesia. 3) An example operational forecast for autumn 2011 predicts areas likely to have above, below, or normal solar irradiance that season.