About this river
Oswego River is a 2.0 mile river near Ace Charters in New York. Streamflow is measured at the USGS gauge Oswego River at Lock 7, Oswego NY (site 04249000). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1934 to 2026
Oswego River typically runs highest in April, at a median 12,800 cfs, and lowest in September, at 2,025 cfs. The highest flow on record for any single day is 37,000 cfs, in 1936.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 8,000 | 5,200 to 11,700 | |
| February | 7,500 | 4,650 to 10,700 | |
| March | 11,000 | 7,620 to 15,100 | |
| April | 12,800 | 8,430 to 17,100 | |
| May | 7,030 | 3,800 to 11,400 | |
| June | 3,935 | 2,655 to 6,880 | |
| July | 2,500 | 1,610 to 4,330 | |
| August | 2,030 | 1,330 to 3,190 | |
| September | 2,025 | 1,410 to 3,055 | |
| October | 2,670 | 1,710 to 4,580 | |
| November | 5,885 | 3,100 to 9,080 | |
| December | 8,750 | 6,240 to 11,500 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 92 years of record. Statistics published by the US Geological Survey for Oswego River at Lock 7, Oswego NY (site 04249000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Oswego River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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