The Adaptive Ecosystem Climatology (AEC) is a system for rapidly merging oceanographic observations with numerical simulations to provide an online decision-support tool (with analysis and visualization capabilities) for ecological forecasting. The Naval Research Laboratory detachment at Stennis Space Center has developed the AEC to provide a flexible tool for eco-forecasting applications. The AEC melds observations collected by oceanographers, amateur observers, e.g., boaters, fishermen, beachgoers, students, crowdsourcing, Earth Observation (EO) satellites, archived in situ data, and output from a state-of-the-art, data assimilative, coupled bio-optical-physical ocean model system. The AEC mitigates the shortcomings of the components and combines their strengths to enhance decision-making activities for end-user organizations. Using the visualization and analysis tools available on the AEC portal, the satellite and model climatologies can be displayed and manipulated, and the data files can be downloaded by users, for direct input into external management models, such as ecosystem, oil trajectory, or fisheries models.