Temperature dependent polarized electroluminescence from (0001)-oriented blue and violet InGaN/GaN multiple-quantum-well (MQW) light-emitting diodes (LEDs) has been investigated. The viewing angle dependent light emission is found to be highly polarized perpendicular to the electrical field in the MQWs. The polarization ratio of 410 nm LEDs exhibits monotonic decrease with increasing temperature from room temperature to 200 °C. In contrast, the polarization ratio of 470 nm LEDs initially increases with increasing temperature and then decreases at higher temperatures. This result suggests that carrier localization in quantum-dot-like structures could relax the polarization-related optical selection rule. Meanwhile, polarization ratios of side emission from both LEDs decrease at elevated injection current levels.