It should be pointed out that this paper reports observations conducted ininterruptdly during a 10 day period on anomalous distribution of physical properties of sea water. The experimental results obtained on the coastal region west off Cabo Frio (RJ), during the mentioned period showed the dominance of advectives and difusal processes causing changes in the distribution of temperature and salinity on sea surface layer. The anomaly recorded may be indicated by clouds of the "cumulus" type formed by penetrating convection, a fact which may be confirmed by comparing photographic data obtained by ERTS satellite.