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Nine oceanographic stations in Monterey Bay were occupied on at least weekly intervals from 21 September 1971 through 28 January 1972. During this period the three oceanic seasons described by previous investigators were observed. Measured thermal conditions were compared to previously derived long­ term mean values. The magnitude of the short-period thermal fluctuations was comparable to that noted in earlier investigations. The changes in seasonal thermal structure were greater and more rapid than climatology implied. Unusually weak upwelling in August 1971 was followed in October by stronger than normal upwelling. This resulted in an interruption in the Oceanic Period and delayed the start of the Davidson Current regime in the bay. The network of regularly occupied stations was more extensive than had been previously possible. Quasi-synoptic observations between two offshore stations indicated north­ south geostrophic current velocity components on the order of 2 to 14 cm/sec. http://archive.org/details/anoceanographici1094516274 Lieutenant, United States Coast Guard Approved for public release; distribution is unlimited.