Tensile failure of metals often occurs through void nucleation, growth and coalescence. This work is concerned with the study of plastic nanovoid cavitation in face-centeredcubic (FCC) crystals at ﬁnite temperature. In particular, the Quasicontinuum (QC) method,suitably extended to ﬁnite temperatures, is taken as the basis for the analysis. We speciﬁcallyfocus on nanovoids in copper single crystals deforming in uniaxial and triaxial tension. Thecomplex structure of dislocations around the nanovoid and the evolution of stress, deformationand temperature of the sample is described in the present work.