The tidal forecasting model is a harmonic analysis tidal forecasting system based on the Foreman (1992) with model-predicted tidal parameters. Five tidal constituents M2, S2, N2, K1 and O1 are included in this system. Two choices are available in this system: the first is to forecast tidal elevation and current at a selected site for a selected period, and the second is to forecast the snapshot of the distribution of water level and tidal currents over the entire Satilla River for a selected time.