Ashuelot River Flow Today
As of October 8, 2026 at 3:45 AM, the Ashuelot River is flowing at 157 cfs at Hinsdale, NH — 50% of normal for the date and down 4% in 24 hours. 4 of 5 USGS gauges reported in the last 3 days; flows range from 21 to 157 cfs. ❤ Favorite
Ashuelot River map
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Ashuelot River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Hinsdale, the Ashuelot River is running 157 cfs — 50% of normal, down 4% since yesterday. Along the river, 4 of 4 reporting gauges are below normal (the typical gauge is at 46% of normal).
In the last 24 hours the river is dropping at Surry Mount Dam (-15%).
How the Ashuelot River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Gilsum810 ft 21 cfs45%
- Surry Mount Dam502 ft 29 cfs45%
- West Swanzey456 ft 97 cfs46%
- Hinsdale205 ft 157 cfs50%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Ashuelot River streamgauge, placed by its own percent of normal. The line is the typical gauge (46%).
Ashuelot River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | Elevation |
|---|---|---|---|---|---|
|
Ashuelot River Near Gilsum NH
Oct 8, 3:30 AM · USGS 01157000 |
21 cfs | 45% | -4% | 1.81 ft | 810 ft |
|
Ashuelot River Below Surry Mount Dam NH
Oct 8, 3:30 AM · USGS 01158000 |
29 cfs | 45% | -15% | 4.92 ft | 502 ft |
|
Ashuelot River Above The Branch NH
Last reported Oct 1 · USGS 01158110 |
21 cfs | · | · | 64.72 ft | 476 ft |
|
Ashuelot River At West Swanzey NH
Oct 8, 3:45 AM · USGS 01160350 |
97 cfs | 46% | 0% | 5.32 ft | 456 ft |
|
Ashuelot River At Hinsdale NH
Oct 8, 3:45 AM · USGS 01161000 |
157 cfs | 50% | -4% | 3.25 ft | 205 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the Ashuelot River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
Ashuelot River streamflow over time
Daily total flow across every monitored gauge on the river.
Maximum streamflow by year
Ashuelot River
The Ashuelot River is a 64-mile-long river in southwestern New Hampshire. The river flows through several towns, including Ashuelot, Winchester, Hinsdale, and Swanzey. The river's hydrology is largely influenced by the many dams and reservoirs along its length. The two largest reservoirs are the Highland Lake and the Surry Mountain Lake. The river has historically been used for water-powered mills, and today it is used for hydroelectric power generation. Additionally, the river provides opportunities for recreational activities such as fishing, canoeing, and kayaking. The river is also used for agricultural irrigation in some areas. The Ashuelot River is an important natural resource for the region and is home to a variety of fish species, including trout, smallmouth bass, and walleye.
Fishing near the Ashuelot River
About the Ashuelot River
How is the Ashuelot River flowing right now?
As of October 8, 2026, the Ashuelot River is flowing at 157 cfs at Hinsdale, NH, about 50% of normal for the date. Across its 5 USGS gauges, current flows range from 21 to 157 cfs. Every gauge’s live reading is in the table above.
Is the Ashuelot River running high or low?
The typical gauge on the Ashuelot River is at 46% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.