Past, present and future ocean state at the water surface from a Coastal and Regional Ocean COmmunity (CROCO) numerical model configuration of the Algoa Bay region. The model is initialised once a day, and produces output at an hourly temporal resolution for a period of 5 days into the past to 5 days into the future. The provided variables are sea surface temperature (SST), sea surface height (SSH), salinity and surface currents. Boundary conditions for the model are obtained from the ~9km resolution Mercator global ocean analysis and forecast product, while surface forcing is obtained from the Global Forecast System (GFS). Our configuration represents a 'downscaling' of the Mercator global ocean product to high resolution (~500 m) over Algoa Bay, allowing for the simulation of local bay-scale processes.