About this river
Great Egg Harbor River is a 5.4 mile river near Seaview Harbor Marina in New Jersey. Streamflow is measured at the USGS gauge Great Egg Harbor River at Folsom NJ (site 01411000). The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1925 to 2025
Great Egg Harbor River typically runs highest in March, at a median 107 cfs, and lowest in September, at 44 cfs. The highest flow on record for any single day is 1,300 cfs, in 1940.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 90 | 69 to 120 | |
| February | 94 | 76 to 122 | |
| March | 107 | 83 to 144 | |
| April | 98 | 77 to 134 | |
| May | 83 | 65 to 106 | |
| June | 60 | 47 to 81 | |
| July | 50 | 37 to 72 | |
| August | 46 | 34 to 69 | |
| September | 44 | 32 to 66 | |
| October | 48 | 38 to 72 | |
| November | 66 | 52 to 93 | |
| December | 82 | 64 to 114 |
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 100 years of record. Statistics published by the US Geological Survey for Great Egg Harbor River at Folsom NJ (site 01411000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
3 mapped launches sit in the mapped area of Great Egg Harbor River. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Great Egg Harbor 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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