Many strategies to avoid the harmful effects of ambient high temperature can be applied on specific feed manipulations as wet feed. The present study was conducted to investigate the impact of using wet feed in hottest different times of day to alleviate the negative effects of heat stress during summer season in Upper Egypt. Hundred and twenty Japanese quail chicks (one-day old) were reared in batteries and assigned to four groups (30 birds /each). The chicks of first group (C) were full-fed ad libitum fed dry mash feed. While, the first, second and third treatment (T1, T2 and T3) was fed on wet feed (1 part of feed to 1 part of water) for different periods during the noon (the highest recorded temperature hours during the day): 1000-1300h, 1300-1600h and 1000-1600h, respectively. All experimental chicks were raised under similar environmental and managerial conditions. The results showed that the third and fourth groups (T2; 1300-1600h or T3; 1000-1600h) had superior body weight, feed conversation, dressed carcass and mortality percentages compared to the other groups (control group, C and second group, T1). Otherwise, insignificant differences observed in feed consumption, plumage conditions and some blood parameters. It could be concluded that birds fed wet feed during all hottest period of day (1000-1600h) may help to decrease peaks of heat production, enhance evaporative activity and reduces heat load, resulting in positive effects on growth performance and health status of the birds reared in hot climate. Consequently, it could be recommended to present the feed for growing Japanese quail as wet form at hottest time of day under summer conditions.