India possesses 5 per cent of the World’s total water resources. According to K. L. Rao (1975), there are about 10,360 rivers of at least 1.6 km length each with average annual flow of 1869 km3. From the geographical perspective, only 69000 corers km3 (32 %) surface water is used, due to uneven distribution and other hindrances (Gurjar, 2008). The study region ‘Upper Krishna Basin’ extends between 15˚44´ to 18˚ 03´16´´ North latitude and 73˚ 33´ to 75˚ 16´30´´ East longitudes. The main objective of present research paper is to study spatio-temporal variation of surface water availability in sub basins of upper Krishna basin in Maharashtra. River Krishna basin is divided into two major basins namely western and eastern upper Krishna basin. Total area of upper Krishna basin is 20,400 km², out of it western part of upper Krishna covers 15,116 km² and eastern part of upper Krishna coverage is 5284 km². In western part of the study region, water availability is more than 99 per cent in Krishna NW and Krishna SW sub-basin. In eastern part of study region, Yerala and Agarani sub-basins are highly water deficit basins and the surface water availability is only 01 per cent.