Man is a great consumer of energy. Therefore, studying and improving energy supply mechanisms is of paramount importance for society. In this area, renewable energies see themselves as a great environmental ally in contrast to fossil fuels. Some examples are: solar, wind, biomass and hydro. In this work the authors calculated the wind direction, wind speed profiles, and wind potential for a region near Cabo Frio-RJ, using data from the Cabo Frio (Nova) buoy of the National Program of Boias (PNBOIA) and data from the ERA5 reanalysis of temperature, speed, wind direction and significant wave height, for the period between 01/08/2016 and 31/07/2017. The preliminary results showed that the average absolute difference between the wind speed of PNBOIA and ERA5 was approximately 1 m/s. Furthermore, through the wind rose, it was observed that there was no significant percentage difference between the wind directions of PNBOIA and ERA5. It was concluded that this is a favorable region for the installation of wind power plants.