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Awareness of evapotranspiration (ET) and crop coefficient (K c ) is necessary for irrigation management in coffee crops. ET and K c spatial variabilities are disregarded in traditional methods. Methods based on radiometric measurements have potential to obtain these spatialized variables. The K c curve and spatial variability of actual evapotranspiration (ET a ) were determined using images from Landsat 8 satellite. We used images of young and adult coffee plantations from OLI (Operational Landdoi:10.1590/1678-992x-2017-0158 fatcat:36vcx3flejfahm56msalp6sm6i