Estimation of ocean surface winds from space is an important field in remote sensing research, with applications such as hurricane forecasting, wind energy mapping, estimation of oil spill drift patterns, validation, and development of numerical weather forecasting models (NWP) and several other applications. In this study, using meteorological buoys and a C-band cross-polarization image of the Sentinel-1 mission, wind speed at sea surface was estimated without the need for wind direction. To evaluate the results, a number of buoys were selected as control points and a number as checkpoints. The comparison results showed that the sigma0 obtained from the Sentinel-1 mission image has a linear correlation of 67.26% with the wind speed measured by the buoys in the study area.