From December 2002 through June 2003, surface currents were measured and analyzed near the mouth of the Kenai River in upper Cook Inlet (Figure 1). This was achieved by utilizing High Frequency (HF) radar systems manufactured by Coastal Ocean Dynamic Applications Radar (CODAR) Ocean Sensors, which operated continuously, aside from a seven-day dropout of data due to a damaged computer modem. Spatial coverage of the data return varied over the semidiurnal tidal period due to exposed beach seaward of the radar antennas during low tides, and over subtidal frequencies spatial coverage was reduced during periods of no or slight winds, presumably due to the absence of significant energy in the wave field at the Bragg wavelength.