15 pages., via online journal., This study aimed to analyse the mediating role of farmers' time perspective in water resources exploitation behaviour/s (WREB). The study was descriptive correlational and causal relational and was carried out using a survey. The statistical population consisted of farmers in the eastern area of Lake Urmia (N = 232 295), of whom 386 persons were selected using a stratified random sampling method. The instrument was a questionnaire, whose validity was confirmed by a panel of experts. Its reliability was also verified by performing the Cronbach's alpha test (0.60 ≥ α ≥ 0.94). The causal framework is presented based on the findings. In such a condition, self‐efficacy, psychological needs and time perspective had the highest total causal effect on farmers' WREB. Moreover, the results confirmed the mediating role of time perspective (as a personal variable) and time norms (as a social variable) in WREB. Therefore, the proper conduct of farmers' WREB needs to provide a futuristic perspective, which is also confirmed by social norms.