Determining the characteristics of each watershed in terms of hydrological status is essential for climate studies of each region. Measuring rainfall, temperature and other atmospheric parameters, as well as determining the state of drought and monitoring it, will play a significant role in understanding the conditions of the watershed. In this regard, the current research was conducted with the aim of determining drought conditions in the Atrak River sub-basin using the SWAT model. The highest rate of drought in the future according to the SRI index will be equal to 15 and under scenario 3, which is 5 units more than the base period. According to the SSWI index, the highest occurrence of drought in the future is predicted to be equal to the number 10, which occurs under scenario 3. In general, under all scenarios and in the entire studied area, agricultural drought has a lower number of occurrences than hydrological drought. Based on the results, in all scenarios, the average number of hydrological and agricultural droughts will increase compared to the base period. The longest period of hydrological drought in the next 30 years is equal to 70 months, which occurs in scenario 4. It should be noted that the longest period of agricultural drought is calculated as 70 months, which takes place under scenario 4. The results showed that the response of hydrological and agricultural droughts to climate changes will not be the same, and agricultural droughts react more to climate changes.