The Brazilian Navy operated a directional wave meter WAVERIDER DATAWELL off shore of the Arraial do Cabo South coast, Rio de Janeiro, Brazil, at 82-m water column, from august, 1998 to October, 1999. The preliminary results of the directional wave processing are presented. The short-term time series were consisted and then submitted to directional spectra procedures. Time hystories of wave parameters, such as significant height, period peak, mean direction and spreading at the peak period were synthesized on histograms and joint occurrence diagrams. The results show that most of the energy comes from SSE to SSW, with periods varying from 11 to 13 seconds. A second peak of energy comes from ESE to SSE with periods varying from 7 to 9 seconds. The spreading of the southerly waves, farthermost generated, were slightly greater than of the SE ones. It can be, possibly, related to a bigger space-time variability of the winds in their respective generation zone.