We have measured the internal wave field seaward of the continental shelf break off Vancouver Island, British Columbia, with an array of four moored temperature sensors and numerous STD casts. These measurements have been analyzed for their energy content at the semidiurnal tidal frequency, and the results compared with a theory of generation of internal tides at a shelf break. A peak in amplitude is observed at a depth slightly greater than that predicted by the theory. The observed phase change across this peak is consistent with seaward propagation of energy from the shelf break.