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Diurnal behaviour of dairy cows was assessed in different thermal stress management system during summer period. Three different thermal stress alleviating measures were compared with control animals. Wetting and forced ventilation (T1), early morning and late evening concentrate feeding (T2), Vitamin E supplementation (T3) and control (T4)were the treatments. Time remained in standing position was more in control animals. Animals in T1 spent more time in lying position forrumination than other treatments. Animals in T1 which were subjected to wetting and forced ventilation experienced less thermal stress and stayed significantly more time in lying position than control. It was concluded that wetting and forced ventilation was better option to reduce thermal stress in dairy cattle.