South Branch Raritan River at South Branch NJ

Somerset County, New Jersey · USGS gauge 01398102 · NWS SBNN4 · South Branch Raritan River flood status · New Jersey river levels

Nearby: river levels near Pottersville · river levels near Manville

Is South Branch Raritan River at South Branch NJ flooding right now?

South Branch Raritan River at South Branch NJ measured 2.64 ft on 2026-09-11 01:15:00 UTC. No NWS minor flood stage is published for this gauge.

Gauge height
2.64 ft
as of 57 min ago
Streamflow
data refreshed 10 min ago

The highest crest on record was 15.08 ft on Thu, May 1, 2014.

No National Weather Service flood stage is published for this gauge, so no flood category can be shown — why some gauges have no flood stage.

Highest crests on record

StageDate
15.08 ft2014-05-01

Nearby gauges

GaugeDistanceCounty
North Branch Raritan River at South Branch NJ0.8 miSomerset County
North Branch Raritan River near Raritan NJ1.9 miSomerset County
Holland Brook at Readington NJ1.9 miSomerset County
North Branch Raritan River at North Branch NJ3.8 miSomerset County
SB Raritan River at Black Point Rd at Neshanic Sta NJ3.9 miSomerset County
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast