This paper deals with the granulometric study of the sand of 15 beaches of the Ubatuba shoreline. The parameters studied were those suggested by Folk and Ward (SUGUIO, 1973): mean size (Mz), inclusive graphic standard deviation (σI), inclusive graphic skewness (Ski) and graphic kurtosis (Kg). The data shows that fine sand is the predominant size class in most of the beaches. The frequency distribution curves show negative skewness and are either meso or leptokurtic.