Ashuelot River River Levels

Last Updated: December 4, 2025

The Ashuelot River is a 64-mile-long river in southwestern New Hampshire.


Summary

Total streamflow across the Ashuelot River was last observed at 493 cfs, and is expected to yield approximately 978 acre-ft of water today; about 21% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 2,399 cfs, with recent peaks last observed on 2021-07-20 when daily discharge volume was observed at 11,380 cfs.

Maximum discharge along the river is currently at the Ashuelot River At Hinsdale reporting a streamflow rate of 232 cfs. However, the streamgauge with the highest stage along the river is the Ashuelot River Above The Branch with a gauge stage of 65.13 ft. This river is monitored from 5 different streamgauging stations along the Ashuelot River, the highest being situated at an altitude of 810 ft, the Ashuelot River Near Gilsum.

River Details

Last Updated 2025-12-04
Discharge Volume 978 ACRE-FT
Streamflow 493.2 cfs
-24.8 cfs (-4.79%)
Percent of Normal 20.56%
Maximum 11,380.0 cfs
2021-07-20
Seasonal Avg 2,399 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Ashuelot River Near Gilsum
USGS 01157000
21 cfs 1.99 ft -24.26
Ashuelot River Below Surry Mt Dam
USGS 01158000
61 cfs 5.26 ft -1.94
Ashuelot River Above The Branch
USGS 01158110
21 cfs 65.13 ft -43.4
Ashuelot River At West Swanzey
USGS 01160350
180 cfs 5.74 ft -3.74
Ashuelot River At Hinsdale
USGS 01161000
232 cfs 3.73 ft -4.13
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Ashuelot River is a tributary of the Connecticut River, approximately 64 miles (103 km) long, in southwestern New Hampshire in the United States. It drains a mountainous area of 425 square miles (1,101 km2), including much of the area known as the Monadnock Region. It is the longest tributary of the Connecticut River within New Hampshire.