In recent times, micro-hydrodynamic herringbone grooved bearings (HGBs) have been broadly used for various high-performance electronic devices, such as high-speed CD-ROM drive, hard disk drive, laser scanner, copier equipment, etc. The herringbone grooves have excellent stiffness, load carrying capacity and leakage-free due to the groove pumping effect to realize long bearing life and reliability. However, bearings usually experience a substantial variation in temperature owing to viscous heating dissipation during operations. This significantly affects lubricant viscosity and the bearing performance caused by rises in oil film temperature. In this work, the characteristics including the lubricant film pressure, load carrying capacity and friction torque are predicted using the computational fluid dynamics (CFD) software ANSYS/Fluent^® for a micro-hydrodynamic HGB with consideration of frictional heat source in lubricant films at different eccentricity ratios and rotating speeds. The simulation results of the velocity and pressure distributions revealed that the temperature effect on the bearings performance can result in deterioration of the load capacity thanks to a reduction in the pressure distribution for some operating cases.