The tidal phase at which ocean internal waves are generated is examined by using two sets of data. The first data set, consisting of 21 times series of internal-wave packets located with respect to the continental shelf edge on satellite images, clearly indicates generation near flood tide. In the second data set, observations of thermal oscillations shoreward of a sill can be modeled either as generated shortly after ebb tide on the seaward side of the sill or slightly before flood on the shoreward side. The absence in both sets of observations of evidence of internal waves over the sill or seaward of the sill points to flood generation at the sill as well as at the shelf. The shelf edge is found to be the most likely site of tidal generation of internal waves observed over the shelf.