Total streamflow across the Flat River was last observed at 55 cfs, and is expected to yield approximately 109 acre-ft of water today; about 15% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 375 cfs, with recent peaks last observed on 2025-02-13 when daily discharge volume was observed at 7,090 cfs.

Maximum discharge along the river is currently at the Flat River At Bahama reporting a streamflow rate of 55.1 cfs. This is also the highest stage along the Flat River, with a gauge stage of 1.53 ft at this location. This river is monitored from 3 different streamgauging stations along the Flat River, the highest being situated at an altitude of 353 ft, the Flat River At Bahama.