In this paper, a preliminary description of the characteristics of wind speed at 10 m in the meteorological station San Julián Aero, Santa Cruz, Argentina was performed. The analysis was conducted in order to assess the wind power generation capacity in the region. A comprehensive quality control process of the wind data series was carried out where it was found periods of malfunction and instrumental changes, so that the series resulted not homogeneous. Daily and annual cycle of each period, as well as their distributions and extreme values associated with the characteristics speed of the wind turbines were described. On the other hand, to explore whether the variability of the wind at10 m is representative of the variability of wind speed at the height of the rotor, wind speed data at 40 m, 50 m and 60 m measured at a nearby tower the surface station were studied. Different MCP (measure-correlate-predict) methods were applied to determine the degree of directional correlation between the data in the tower vs surface data obtaining significant values in all cases, suggesting that it could taken the daily mean wind speed at 10 m as representative to estimate the variability of the wind at the required height to generate wind power. The results show the difficulty of making any study of wind variability and/or extreme values with short series because they are sensitive to the record length, type and quality of the instruments and also to changes in location and height of the measuring instrumental and nearby obstacles.