Oconto River River Levels

Last Updated: December 4, 2025

The Oconto River is located in northeastern Wisconsin and flows for approximately 56 miles before emptying into Green Bay.


Summary

Total streamflow across the Oconto River was last observed at 596 cfs, and is expected to yield approximately 1,182 acre-ft of water today; about 37% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,601 cfs, with recent peaks last observed on 2019-04-20 when daily discharge volume was observed at 11,130 cfs.

Maximum discharge along the river is currently at the Oconto River Near Gillett reporting a streamflow rate of 596 cfs. However, the streamgauge with the highest stage along the river is the Oconto River Near Oconto with a gauge stage of 3.92 ft. This river is monitored from 2 different streamgauging stations along the Oconto River, the highest being situated at an altitude of 741 ft, the Oconto River Near Gillett.

River Details

Last Updated 2025-12-02
Discharge Volume 1,182 ACRE-FT
Streamflow 596.0 cfs
-59.0 cfs (-9.01%)
Percent of Normal 37.22%
Maximum 11,130.0 cfs
2019-04-20
Seasonal Avg 1,601 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Oconto River Near Gillett
USGS 04071000
596 cfs 1.71 ft 98.01
Oconto River Near Oconto
USGS 04071765
198 cfs 3.92 ft -54.48
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

Located in northeastern Wisconsin, the Oconto River is a tributary of Lake Michigan via Green Bay. The Oconto River is 56.9 miles (91.6 km) long, stretching from the confluence of its North and South branches at Suring, Wisconsin, to Green Bay at the city of Oconto. Its drainage basin covers 2,416 square miles (6,260 km2), encompassing most of Oconto County as well as portions of Shawano, Marinette, Menominee, Langlade, and Forest counties.