South Branch Raritan River at South Branch NJ water level

Name: South Branch Raritan River at South Branch NJ water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, South Branch Raritan River, New Jersey, United States

Directions

Latest reading

Water level

2.27ft Down 0.05 ft over the last 24 hours

Measured Oct 21, 2026, 05:15 AM EDT (38 min ago)

History

7 days

Water level

What this means

The U.S. Geological Survey has the South Branch Raritan River at South Branch NJ at 2.27 ft. The agency publishes no normal range or warning level for this river yet, so there is nothing to judge the number against.

It is still going down, by 0.05 ft over the past 24 hours. The 30-day range is 2.27 ft – 2.65 ft.

Over the past seven days the change adds up to −0.21 ft.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

Key numbers

Highest on record: 15.08 ftMay 1, 2014

Paddling and fishing conditions

Compare today with the chart before you go; local outfitters often know which stage suits their stretch.

Highest crests on record

Rank	Level	Date
1	15.08 ft	May 1, 2014

Weather at the gauge

No rain in the last 3 days.

21 Wed 65° 43° – Wind 11 mph

22 Thu 67° 38° – Wind 12 mph

23 Fri 60° 46° – Wind 9 mph

24 Sat 61° 43° – Wind 4 mph

25 Sun 64° 45° – Wind 6 mph

26 Mon 67° 45° – Wind 6 mph

27 Tue 70° 52° – Wind 7 mph

Forecast: Open-Meteo

Sunrise 07:17 AM Sunset 06:11 PM Daylight 10 hr, 55 min Waxing gibbous 76%

Map

Other gauges on the South Branch Raritan River

Gauge	Level	Compared with normal	24 hours	Distance
South Branch Raritan River near High Bridge NJRiver gauge, South Branch Raritan River	5.91 ft	Below flood stage	−0.01 ft	13 mi
South Branch Raritan River at Stanton NJRiver gauge, South Branch Raritan River	2.49 ft	Below flood stage	−0.03 ft	9 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
North Branch Raritan River at South Branch NJRiver gauge, North Branch Raritan River	1.55 ft	Below flood stage	−0.02 ft	0.8 mi
North Branch Raritan River near Raritan NJRiver gauge, North Branch Raritan River	2.82 ft	Below flood stage	−0.01 ft	1.9 mi
North Branch Raritan River at North Branch NJRiver gauge, North Branch Raritan River	3.08 ft	Below flood stage	−0.02 ft	3.9 mi
Royce Brook at Hamilton Road near Manville NJRiver gauge, Royce Brook	7.4 cfs	Normal	+0.4 cfs	4.8 mi
Millstone River at Weston NJRiver gauge, Millstone River	1.73 ft	Below flood stage	−0.12 ft	5.8 mi
Raritan River at Manville NJRiver gauge, Raritan River	4.23 ft	Below flood stage	−0.04 ft	6.0 mi
Pike Run at Belle Mead NJRiver gauge, Pike Run	1.4 cfs	Normal	−0.2 cfs	6.0 mi
Lamington River at Burnt Mills NJRiver gauge, Lamington River	3.03 ft	Below flood stage	−0.02 ft	6.1 mi

Questions and answers

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of South Branch Raritan River at South Branch NJ today?

On Oct 21, 2026, 05:15 AM EDT, the water level was 2.27 ft. Down 0.05 ft over the last 24 hours.

Is South Branch Raritan River at South Branch NJ rising or falling?

Down 0.05 ft over the last 24 hours. Down 0.21 ft over the last 7 days.

Is the level of South Branch Raritan River at South Branch NJ normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

What is the highest water level ever recorded at South Branch Raritan River at South Branch NJ?

The highest level on record is 15.08 ft on May 1, 2014.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:01398102 (Agency page)
Coordinates: 40.54694, -74.69639 (WGS84)
Vertical datum: NGVD29
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	2.27 ft	2026-10-21 09:15	Provisional

Download

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How to cite

U.S. Geological Survey: South Branch Raritan River at South Branch NJ (usgs:01398102). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-jersey/south-branch-raritan-river-at-south-branch-nj

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer