Oswego River River Levels

Last Updated: February 20, 2026

The Oswego River is a 23-mile-long river located in upstate New York that flows into Lake Ontario.


Summary

Total streamflow across the Oswego River was last observed at 4,990 cfs, and is expected to yield approximately 9,898 acre-ft of water today; about 60% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 8,367 cfs, with recent peaks last observed on 2011-05-01 when daily discharge volume was observed at 27,000 cfs.

Maximum discharge along the river is currently at the Oswego River At Lock 7 reporting a streamflow rate of 4,990 cfs. However, the streamgauge with the highest stage along the river is the Oswego River At Harrisville Nj with a gauge stage of 10.36 ft. This river is monitored from 2 different streamgauging stations along the Oswego River, the highest being situated at an altitude of 254 ft, the Oswego River At Lock 7.




15-Day Weather Outlook


River Details

Last Updated 2026-02-20
Discharge Volume 9,898 ACRE-FT
Streamflow 4,990.0 cfs
+450.0 cfs (+9.91%)
Percent of Normal 59.64%
Maximum 27,000.0 cfs
2011-05-01
Seasonal Avg 8,367 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Oswego River At Lock 7
USGS 04249000
4990 cfs 4.4 ft 9.91
Oswego River At Harrisville Nj
USGS 01410000
59 cfs 10.36 ft 5.21
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Oswego River is a 23.7-mile-long (38.1 km) tributary of the Wading River in the southern New Jersey Pine Barrens in the United States.