This study evaluated the effects of drinking water temperature during the summer period on growth performance, meat quality, and serum biochemical traits in growing broilers. A total of 360 Cobb 500 broilers with uniform body weight aged 21 days were assigned to 3 treatments and 8 replicates of 15 birds cach. Three groups were treated with drinking water, including ordinary room temperature tap water, and two fixed temperature water of 15.4°C and 24.3°C. The duration of the trial ranged from 22 to 35 days. Before the commencement of the study, all the broilers (400-day-old chicks) were fed commercial pre- starter (3050 kcal/kg ME, 22.50% CP) and starter (3100 kcal/kg ME, 20.50% CP) diet for the first 7 days and the next 14 days. The finisher dict containing 3200 kcal/kg of ME and 18.5% CP was fed up during the trial period. Results showed that the body weight gain (BWG) and feed intake (FI) were influenced (P < 0.01) by the drinking water temperature of 15.4°C and 24.3°C as compared to ordinary tap water. The highest body weight and feed intake were observed in the 15.4°C drinking water temperature group. But no consistent difference in BWG between the 15.4°C and 24.3°C water temperature group was observed. The treatments did not alter the color of the meat except for yellowness and other meat quality parameters. Moreover, no differences were found in the fatty acid composition of breast and thigh meat. Significantly (P < 0.05) lower glucose and higher alanine aminotransferase concentration in serum were found in the group treated with 15.4°C water. These results indicated that drinking water temperature below the ambient level during summer can effectively improve the growth performance, meat quality and maintaining homeostasis balance.