New Hampshire streamflow
Live discharge, gauge height, water temperature, and percent-of-normal readings from every USGS streamgauge in New Hampshire. Built for paddlers, anglers, water managers, and flood researchers.
Streamflow levels across New Hampshire are currently 270% of normal, with the Connecticut River At North Walpole reporting the highest discharge in the state at 38,100 cfs and a gauge stage of 17.93 ft.
Meanwhile, the Merrimack R Nr Goffs Falls is seeing a spike today — up 200% 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.
State-wide streamflow overview
The New Hampshire flow picture in four data points -- where the state sits versus historical norms, what's flowing hardest, and what's spiking fastest.
Percent of normal
100% is the historical norm. Below 70% indicates drought; above 130% can flag elevated flood risk.
Highest discharge
Gauge stage 17.93 ft
Biggest 24h spike
Now 19,200 cfs
Network coverage
USGS gauges feeding 28 named rivers in New Hampshire.
New Hampshire USGS streamgauges
Every USGS gauge Snoflo tracks in New Hampshire. Sortable, quickly filterable. Numeric columns heat-mapped from light to deep. Tap any gauge for its full hydrograph and forecast.
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Androscoggin River Near Gorham, Nh
9 hours ago · USGS 01054000 |
4,510 cfs | 5.16 ft | · | 73°F | 848 ft | Upper Androscoggin |
|
Androscoggin River At Errol, Nh
9 hours ago · USGS 01053500 |
1,790 cfs | 2.48 ft | · | 71°F | 1,249 ft | Upper Androscoggin |
|
Diamond River Near Wentworth Location, Nh
9 hours ago · USGS 01052500 |
1,160 cfs | 4.77 ft | · | 72°F | 1,315 ft | Upper Androscoggin |
|
Bearcamp River At South Tamworth, Nh
9 hours ago · USGS 01064801 |
1,360 cfs | 6.35 ft | · | 76°F | 553 ft | Saco |
|
Saco River Near Conway, Nh
9 hours ago · USGS 01064500 |
6,610 cfs | 7.18 ft | · | 77°F | 486 ft | Saco |
|
Exeter River At Haigh Road, Nh
9 hours ago · USGS 01073587 |
72 cfs | 4.88 ft | · | 77°F | 64 ft | Piscataqua-Salmon Falls |
|
Winnicut River At Greenland, Nh
9 hours ago · USGS 01073785 |
39 cfs | 4.93 ft | · | 77°F | 4 ft | Piscataqua-Salmon Falls |
|
Lamprey River Near Newmarket, Nh
9 hours ago · USGS 01073500 |
271 cfs | 2.45 ft | · | 77°F | 38 ft | Piscataqua-Salmon Falls |
|
Oyster River Near Durham, Nh
9 hours ago · USGS 01073000 |
33 cfs | 1.99 ft | · | 77°F | 69 ft | Piscataqua-Salmon Falls |
|
Isinglass R At Rochester Neck Rd, Nh
9 hours ago · USGS 01072870 |
252 cfs | 5.88 ft | 53°F | 76°F | 112 ft | Piscataqua-Salmon Falls |
|
Cocheco River Near Rochester, Nh
9 hours ago · USGS 01072800 |
451 cfs | 5.23 ft | · | 76°F | 133 ft | Piscataqua-Salmon Falls |
|
Smith River Near Bristol, Nh
9 hours ago · USGS 01078000 |
1,320 cfs | 6.07 ft | 58°F | 76°F | 472 ft | Pemigewasset |
|
Pemigewasset River At Plymouth, Nh
9 hours ago · USGS 01076500 |
9,140 cfs | 8.34 ft | · | 76°F | 476 ft | Pemigewasset |
|
Baker River Near Rumney, Nh
9 hours ago · USGS 01076000 |
1,600 cfs | 3.78 ft | · | 73°F | 509 ft | Pemigewasset |
|
Pemigewasset River At Woodstock, Nh
9 hours ago · USGS 01075000 |
2,450 cfs | 5.50 ft | · | 72°F | 620 ft | Pemigewasset |
|
East Branch Pemigewasset River At Lincoln, Nh
9 hours ago · USGS 01074520 |
1,370 cfs | 6.39 ft | · | 73°F | 836 ft | Pemigewasset |
|
Spicket River Near Methuen, Nh
9 hours ago · USGS 01100561 |
29 cfs | 3.76 ft | · | 78°F | 109 ft | Merrimack |
|
Beaver Brook At North Pelham, Nh
9 hours ago · USGS 010965852 |
47 cfs | 6.31 ft | · | 77°F | 156 ft | Merrimack |
|
Souhegan River (Site Wlr-1) Near Milford, Nh
9 hours ago · USGS 01093852 |
441 cfs | 5.11 ft | 51°F | 77°F | 275 ft | Merrimack |
|
Spicket River At North Salem, Nh
9 hours ago · USGS 01100505 |
0 cfs | 2.05 ft | · | 78°F | 194 ft | Merrimack |
|
Souhegan River At Merrimack, Nh
9 hours ago · USGS 01094000 |
724 cfs | 4.28 ft | · | 78°F | 172 ft | Merrimack |
|
Merrimack R Nr Goffs Falls, Nh
9 hours ago · USGS 01092000 |
19,200 cfs | 8.44 ft | · | 78°F | 115 ft | Merrimack |
|
South Branch Piscataquog River Near Goffstown, Nh
9 hours ago · USGS 01091000 |
549 cfs | 5.13 ft | 52°F | 75°F | 335 ft | Merrimack |
|
Piscataquog River Near Goffstown, Nh
9 hours ago · USGS 01091500 |
1,050 cfs | 5.84 ft | · | 77°F | 179 ft | Merrimack |
|
Piscataquog River Bl Everett Dam, Nh
8 years ago · USGS 01090800 |
8 cfs | 4.67 ft | · | 66°F | 335 ft | Merrimack |
|
Soucook River, Nh
3 years ago · USGS 01089100 |
22 cfs | 3.61 ft | · | 63°F | 269 ft | Merrimack |
|
Suncook River At North Chichester, Nh
9 hours ago · USGS 01089500 |
639 cfs | 4.65 ft | · | 77°F | 388 ft | Merrimack |
|
Merrimack River At Franklin Junction, Nh
9 hours ago · USGS 01081500 |
15,800 cfs | 12.93 ft | · | 78°F | 269 ft | Merrimack |
|
Winnipesaukee River At Tilton, Nh
9 hours ago · USGS 01081000 |
1,090 cfs | 4.24 ft | · | 77°F | 453 ft | Merrimack |
|
Contoocook River At Peterborough, Nh
9 hours ago · USGS 01082000 |
411 cfs | 2.97 ft | · | 74°F | 751 ft | Contoocook |
|
Nubanusit Bk Blw Macdowell Dam Nr Peterborough Nh, Nh
8 years ago · USGS 01083000 |
31 cfs | 2.52 ft | · | 75°F | 902 ft | Contoocook |
|
North Branch River Near Antrim, Nh
14 years ago · USGS 01084000 |
61 cfs | 2.36 ft | · | 59°F | 892 ft | Contoocook |
|
Contoocook River Near Henniker, Nh
9 hours ago · USGS 01085000 |
2,740 cfs | 9.35 ft | · | 76°F | 492 ft | Contoocook |
|
Contoocook R Bl Hopkinton Dam At W Hopkinton, Nh
10 hours ago · USGS 01085500 |
3,040 cfs | 5.88 ft | · | 77°F | 361 ft | Contoocook |
|
Warner River At Davisville, Nh
9 hours ago · USGS 01086000 |
1,300 cfs | 6.77 ft | · | 77°F | 393 ft | Contoocook |
|
Blackwater River Near Webster, Nh
8 years ago · USGS 01087000 |
19 cfs | 1.91 ft | · | 66°F | 453 ft | Contoocook |
|
Ammonoosuc River At Bethlehem Junction, Nh
9 hours ago · USGS 01137500 |
756 cfs | 3.72 ft | · | 73°F | 1,185 ft | Upper Connecticut |
|
Connecticut River Near Dalton, Nh
9 hours ago · USGS 01131500 |
9,090 cfs | 13.39 ft | · | 73°F | 813 ft | Upper Connecticut |
|
Upper Ammonoosuc River Near Groveton, Nh
9 hours ago · USGS 01130000 |
1,820 cfs | 4.47 ft | · | 73°F | 963 ft | Upper Connecticut |
|
Connecticut River At North Stratford, Nh
9 hours ago · USGS 01129500 |
3,980 cfs | 5.95 ft | 49°F | 74°F | 885 ft | Upper Connecticut |
|
Connecticut R Below Indian Stream Nr Pittsburg, Nh
9 hours ago · USGS 01129200 |
719 cfs | 3.46 ft | 48°F | 72°F | 1,211 ft | Upper Connecticut |
|
Connecticut River At North Walpole, Nh
9 hours ago · USGS 01154500 |
38,100 cfs | 17.93 ft | · | 77°F | 223 ft | Upper Connecticut-Mascoma |
|
Sugar River At West Claremont, Nh
9 hours ago · USGS 01152500 |
1,670 cfs | 3.70 ft | · | 77°F | 358 ft | Upper Connecticut-Mascoma |
|
Connecticut River At West Lebanon, Nh
9 hours ago · USGS 01144500 |
28,900 cfs | 13.94 ft | · | 77°F | 322 ft | Upper Connecticut-Mascoma |
|
Ashuelot River At Hinsdale, Nh
9 hours ago · USGS 01161000 |
1,840 cfs | 5.86 ft | · | 78°F | 205 ft | Middle Connecticut |
|
Ashuelot River At West Swanzey, Nh
9 hours ago · USGS 01160350 |
1,570 cfs | 8.42 ft | · | 78°F | 456 ft | Middle Connecticut |
|
S Br Ashuelot River At Webb, Nh
14 years ago · USGS 01160000 |
25 cfs | 2.02 ft | · | 58°F | 696 ft | Middle Connecticut |
|
Ashuelot River Above The Branch, Nh
7 months ago · USGS 01158110 |
21 cfs | 69.82 ft | · | 78°F | 476 ft | Middle Connecticut |
|
Otter Brook Below Otter Brook Dam, Nh
8 years ago · USGS 01158600 |
12 cfs | 5.92 ft | · | 64°F | 692 ft | Middle Connecticut |
|
Ashuelot River Below Surry Mt Dam, Nh
9 hours ago · USGS 01158000 |
618 cfs | 7.24 ft | · | 74°F | 502 ft | Middle Connecticut |
|
Ashuelot River Near Gilsum, Nh
9 hours ago · USGS 01157000 |
434 cfs | 4.67 ft | 53°F | 75°F | 810 ft | Middle Connecticut |
Explore New Hampshire's named rivers
Rivers across New Hampshire with USGS gauge coverage. Tap any one to see every gauge that reports on it -- great for paddlers, anglers, and watershed researchers narrowing in on a specific drainage.
About New Hampshire streamflow
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.