New Hampshire River Levels & Streamflow
As of Oct 15, 2026, New Hampshire rivers are running at 134% of normal across 43 USGS gauges — the highest is 4,340 cfs on the Connecticut River At North Walpole. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in New Hampshire.
New Hampshire river map
See New Hampshire’s rivers on a live map
Every gauge, river and reservoir, one tap each:
- Rivers now — which are running high or low
- Reservoirs — how full each one is vs normal
- Rain — past 24 hrs and the 72-hr forecast, press play
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New Hampshire river conditions today
Where rivers are running versus normal, what’s spiking and what’s coming — refreshed daily from USGS and NOAA.
Streamflow levels across New Hampshire are currently 134% of normal, with the Connecticut River At North Walpole reporting the highest discharge in the state at 4,340 cfs and a gauge stage of 7.68 ft.
Meanwhile, the Diamond River Near Wentworth Location is seeing a spike today — up 3296% since yesterday and currently running near peak.
Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into New Hampshire's named rivers.
How New Hampshire’s rivers compare to normal
Every gauge placed by its own percent of normal, and three years of the statewide trend.
Where every gauge actually sits
One dot per New Hampshire streamgauge, placed by its own percent of normal. The state average is a single line through all of it.
Percent of normal compares today's discharge with the historical average for this calendar day. Tap any dot to open that gauge.
New Hampshire streamflow, three water years
Statewide percent of normal, every day since Oct 2023. The dotted line is normal.
799 daily readings from 43 reporting gauges. Percent of normal is today's statewide discharge against the historical average for the same calendar day — 100% is normal, not "good". The axis tops out at 250%: 19 readings above that — including the 582% peak in Dec 2023 — are drawn along the top edge, so a few flood days cannot flatten three years of everything else. The line breaks in 2 places where the record skips more than five days — those are gaps in reporting, not readings of zero.
New Hampshire flow report
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Connecticut River At North Walpole, Nh
1 day ago · USGS 01154500 |
4,340 cfs | 7.68 ft | · | 67°F | 223 ft | Upper Connecticut-Mascoma |
|
Connecticut River At West Lebanon, Nh
1 day ago · USGS 01144500 |
2,510 cfs | 5.10 ft | · | 65°F | 322 ft | Upper Connecticut-Mascoma |
|
Androscoggin River Near Gorham, Nh
1 day ago · USGS 01054000 |
1,510 cfs | 3.18 ft | · | 40°F | 848 ft | Upper Androscoggin |
|
Connecticut River Near Dalton, Nh
1 day ago · USGS 01131500 |
1,290 cfs | 8.18 ft | · | 45°F | 813 ft | Upper Connecticut |
|
Merrimack River At Franklin Junction, Nh
1 day ago · USGS 01081500 |
1,180 cfs | 4.61 ft | · | 68°F | 269 ft | Merrimack |
|
Diamond River Near Wentworth Location, Nh
1 day ago · USGS 01052500 |
1,090 cfs | 4.67 ft | · | 39°F | 1,315 ft | Upper Androscoggin |
|
Androscoggin River At Errol, Nh
1 day ago · USGS 01053500 |
1,050 cfs | 1.78 ft | · | 40°F | 1,249 ft | Upper Androscoggin |
|
Connecticut River At North Stratford, Nh
1 day ago · USGS 01129500 |
991 cfs | 3.90 ft | 51°F | 44°F | 885 ft | Upper Connecticut |
|
Winnipesaukee River At Tilton, Nh
1 day ago · USGS 01081000 |
923 cfs | 3.94 ft | · | 67°F | 453 ft | Merrimack |
|
Pemigewasset River At Woodstock, Nh
1 day ago · USGS 01075000 |
801 cfs | 3.84 ft | · | 42°F | 620 ft | Pemigewasset |
|
Merrimack R Nr Goffs Falls, Nh
1 day ago · USGS 01092000 |
793 cfs | 2.71 ft | · | 72°F | 115 ft | Merrimack |
|
Connecticut R Below Indian Stream Nr Pittsburg, Nh
1 day ago · USGS 01129200 |
573 cfs | 3.23 ft | 47°F | 42°F | 1,211 ft | Upper Connecticut |
|
East Branch Pemigewasset River At Lincoln, Nh
1 day ago · USGS 01074520 |
539 cfs | 5.03 ft | · | 43°F | 836 ft | Pemigewasset |
|
Saco River Near Conway, Nh
1 day ago · USGS 01064500 |
401 cfs | 2.89 ft | · | 64°F | 486 ft | Saco |
|
Pemigewasset River At Plymouth, Nh
1 day ago · USGS 01076500 |
345 cfs | · | · | 62°F | 476 ft | Pemigewasset |
|
Upper Ammonoosuc River Near Groveton, Nh
1 day ago · USGS 01130000 |
340 cfs | 2.55 ft | · | 42°F | 963 ft | Upper Connecticut |
|
Souhegan River (Site Wlr-1) Near Milford, Nh
1 day ago · USGS 01093852 |
253 cfs | 4.50 ft | 54°F | 71°F | 275 ft | Merrimack |
|
Contoocook R Bl Hopkinton Dam At W Hopkinton, Nh
1 day ago · USGS 01085500 |
250 cfs | 1.97 ft | · | 69°F | 361 ft | Contoocook |
|
Contoocook River Near Henniker, Nh
1 day ago · USGS 01085000 |
226 cfs | 5.76 ft | · | 68°F | 492 ft | Contoocook |
|
Ashuelot River At Hinsdale, Nh
1 day ago · USGS 01161000 |
225 cfs | 3.48 ft | · | 70°F | 205 ft | Middle Connecticut |
|
Ammonoosuc River At Bethlehem Junction, Nh
1 day ago · USGS 01137500 |
216 cfs | 2.26 ft | · | 46°F | 1,185 ft | Upper Connecticut |
|
Ashuelot River At West Swanzey, Nh
1 day ago · USGS 01160350 |
200 cfs | 5.85 ft | · | 69°F | 456 ft | Middle Connecticut |
|
Suncook River At North Chichester, Nh
1 day ago · USGS 01089500 |
165 cfs | 3.57 ft | · | 69°F | 388 ft | Merrimack |
|
Souhegan River At Merrimack, Nh
1 day ago · USGS 01094000 |
141 cfs | 2.88 ft | · | 72°F | 172 ft | Merrimack |
|
Sugar River At West Claremont, Nh
1 day ago · USGS 01152500 |
106 cfs | 1.32 ft | · | 65°F | 358 ft | Upper Connecticut-Mascoma |
|
Baker River Near Rumney, Nh
1 day ago · USGS 01076000 |
105 cfs | · | · | 59°F | 509 ft | Pemigewasset |
|
Contoocook River At Peterborough, Nh
1 day ago · USGS 01082000 |
78 cfs | 1.77 ft | · | 67°F | 751 ft | Contoocook |
|
Bearcamp River At South Tamworth, Nh
1 day ago · USGS 01064801 |
65 cfs | 4.08 ft | · | 63°F | 553 ft | Saco |
|
Ashuelot River Near Gilsum, Nh
1 day ago · USGS 01157000 |
64 cfs | 2.48 ft | 54°F | 65°F | 810 ft | Middle Connecticut |
|
Warner River At Davisville, Nh
1 day ago · USGS 01086000 |
56 cfs | 3.63 ft | · | 69°F | 393 ft | Contoocook |
|
Smith River Near Bristol, Nh
1 day ago · USGS 01078000 |
56 cfs | 2.31 ft | 58°F | 65°F | 472 ft | Pemigewasset |
|
Winnicut River At Greenland, Nh
1 day ago · USGS 01073785 |
53 cfs | 5.20 ft | · | 69°F | 4 ft | Piscataqua-Salmon Falls |
|
Isinglass R At Rochester Neck Rd, Nh
1 day ago · USGS 01072870 |
51 cfs | 3.68 ft | 52°F | 67°F | 112 ft | Piscataqua-Salmon Falls |
|
Lamprey River Near Newmarket, Nh
1 day ago · USGS 01073500 |
48 cfs | 1.23 ft | · | 69°F | 38 ft | Piscataqua-Salmon Falls |
|
Piscataquog River Near Goffstown, Nh
1 day ago · USGS 01091500 |
43 cfs | 3.34 ft | · | 71°F | 179 ft | Merrimack |
|
Ashuelot River Below Surry Mt Dam, Nh
1 day ago · USGS 01158000 |
43 cfs | 5.09 ft | · | 65°F | 502 ft | Middle Connecticut |
|
Spicket River Near Methuen, Nh
1 day ago · USGS 01100561 |
36 cfs | 3.88 ft | · | 75°F | 109 ft | Merrimack |
|
South Branch Piscataquog River Near Goffstown, Nh
1 day ago · USGS 01091000 |
32 cfs | 3.32 ft | 52°F | 69°F | 335 ft | Merrimack |
|
Beaver Brook At North Pelham, Nh
1 day ago · USGS 010965852 |
26 cfs | 6.07 ft | · | 71°F | 156 ft | Merrimack |
|
Cocheco River Near Rochester, Nh
1 day ago · USGS 01072800 |
24 cfs | 2.86 ft | · | 67°F | 133 ft | Piscataqua-Salmon Falls |
|
Exeter River At Haigh Road, Nh
1 day ago · USGS 01073587 |
19 cfs | 4.32 ft | · | 70°F | 64 ft | Piscataqua-Salmon Falls |
|
Oyster River Near Durham, Nh
1 day ago · USGS 01073000 |
6 cfs | 1.13 ft | · | 68°F | 69 ft | Piscataqua-Salmon Falls |
|
Spicket River At North Salem, Nh
1 day ago · USGS 01100505 |
1 cfs | 2.20 ft | · | 71°F | 194 ft | Merrimack |
About New Hampshire streamflow
What are river levels like in New Hampshire right now?
As of October 15, 2026, New Hampshire rivers are running at 134% of normal across 43 USGS streamgauges, and the Connecticut River At North Walpole is reporting the highest discharge at 4,340 cfs. The full sortable gauge table is below.
Which New Hampshire river is running highest right now?
As of October 15, 2026, the highest discharge in New Hampshire is 4,340 cfs on the Connecticut River At North Walpole. See the sortable gauge table for the full statewide ranking.
Are New Hampshire rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means New Hampshire rivers are running higher than the seasonal average for the date, below 100% means lower (a dry spell or drought). Each gauge also shows its own percent of median.
Where does the New Hampshire streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the New Hampshire data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a New Hampshire gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.