About this river
South River is a 2.8 mile river near Griggstown Canoe And Kayak Rental in New Jersey. Streamflow is measured at the USGS gauge Deep Run at Old Bridge NJ (site 01406050). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2001 to 2026
South River typically runs highest in March, at a median 24 cfs, and lowest in September, at 2.8 cfs. The highest flow on record for any single day is 2,120 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 17 | 11 to 30 | |
| February | 20 | 13 to 35 | |
| March | 24 | 15 to 46 | |
| April | 21 | 14 to 34 | |
| May | 16 | 9.2 to 26 | |
| June | 8.3 | 4.4 to 20 | |
| July | 4.8 | 2.4 to 11 | |
| August | 3.5 | 1.3 to 9.7 | |
| September | 2.8 | 0.5 to 8.9 | |
| October | 5.5 | 1.7 to 15 | |
| November | 10 | 4.8 to 21 | |
| December | 18 | 9.8 to 34 |
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 25 years of record. Statistics published by the US Geological Survey for Deep Run at Old Bridge NJ (site 01406050). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show South 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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