Total streamflow across the Atascosa River was last observed at 4 cfs, and is expected to yield approximately 8 acre-ft of water today; about 113% of normal. Average streamflow for this time of year is 4 cfs, with recent peaks last observed on 2023-04-08 when daily discharge volume was observed at 2,920 cfs.

Maximum discharge along the river is currently at the Atascosa Rv At Whitsett reporting a streamflow rate of 3.7 cfs. However, the streamgauge with the highest stage along the river is the Atascosa Rv Nr Mccoy with a gauge stage of 4.89 ft. This river is monitored from 2 different streamgauging stations along the Atascosa River, the highest being situated at an altitude of 265 ft, the Atascosa Rv Nr Mccoy.