About this river
Stony Brook is a 6.0 mile river near Princeton Canoe & Kayak Rental in New Jersey. Streamflow is measured at the USGS gauge Stony Brook at Princeton NJ (site 01401000). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1954 to 2025
Stony Brook typically runs highest in March, at a median 74 cfs, and lowest in September, at 4.2 cfs. The highest flow on record for any single day is 5,600 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 42 | 24 to 84 | |
| February | 53 | 27 to 106 | |
| March | 74 | 43 to 138 | |
| April | 55 | 31 to 96 | |
| May | 26 | 13 to 60 | |
| June | 9.9 | 5.2 to 25 | |
| July | 6.4 | 2.4 to 18 | |
| August | 6.3 | 2.1 to 16 | |
| September | 4.2 | 1.9 to 14 | |
| October | 6.7 | 2.7 to 19 | |
| November | 17 | 7.0 to 45 | |
| December | 42 | 20 to 83 |
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 71 years of record. Statistics published by the US Geological Survey for Stony Brook at Princeton NJ (site 01401000). 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 Stony Brook'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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