Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Yantic River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Yantic River, the highest being situated at an altitude of ft, the .
The Yantic River forms at the confluence of the Deep River, Sherman Brook, and Exeter Brook about 4 miles (6.4 km) east of Colchester, Connecticut. It runs for 14.2 miles (22.9 km) and flows into the Shetucket River in Norwich, forming the Thames River. The Yantic River is a popular whitewater paddling destination with a mix of quickwater and Class I-III whitewater. It passes through the towns of Lebanon, Bozrah, and Norwich.