Ashuelot River near Gilsum water level

Name: Ashuelot River near Gilsum 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, Ashuelot River, New Hampshire, United States

Directions

Below flood stage

Water level

2.82ft Down 0.07 ft over the last 24 hours

Measured Oct 21, 2026, 03:30 AM EDT (44 min ago)

Flow: 98.0 cfs
Water temperature: 47 °F

History

7 days

Water level Minor flood stage

What this means

Water levels are unremarkable at Ashuelot River near Gilsum, where the gauge shows 2.82 ft.

It is 6.68 ft below the flood stage of 9.50 ft.

It is still going down, by 0.07 ft over the past 24 hours. The 30-day range is 2.71 ft – 2.94 ft.

Fall is often low-water season on rivers, until steadier rain returns. The water temperature at the gauge is 47 °F.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Highest on record: 11.36 ftJuly 11, 2023

Paddling and fishing conditions

Most paddlers and anglers will find the river in good shape at this stage.

For reference, flood stage is 9.50 ft.

What happens at each level

12.00 ft: Major flooding occurs. Properties between Maine Street and Church Street in Gilsum cut off by floodwaters if coinciding high flows on Hayward Brook.
11.50 ft: Route 10 near Kinson State Wildlife Area in Marlow vulnerable to flooding.
11.00 ft: Moderate flooding occurs. Water up to Main Street in Gilsum.
10.50 ft: Gilsum Road between Southwoods Road and New Hampshire Route 12A flooded.
10.00 ft: In Gilsum, Riverside Road flooded and homes cut-off. Howard Road bridge inaccessible from Old Marlow Road.
9.50 ft: Water up to Spring Street in Gilsum.
9.00 ft: Water encroaches on Riverside Road in Gilsum and Greenes Landing Road in Marlow.
8.50 ft: Water approaches properties along Old Marlow Road in Gilsum.
2.82 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	11.36 ft	July 11, 2023

Weather at the gauge

The forecast is not available right now.

Sunrise 07:10 AM Sunset 05:58 PM Daylight 10 hr, 48 min Waxing gibbous 75%

Map

Other gauges on the Ashuelot River

Gauge	Level	Compared with normal	24 hours	Distance
Ashuelot River below Surry Mount Dam, near KeeneRiver gauge, Ashuelot River	120 cfs	Normal	+5.0 cfs	3.7 mi
Ashuelot River above The Branch, at KeeneRiver gauge, Ashuelot River	65.54 ft	Below flood stage	−0.01 ft	8 mi
Ashuelot River at West SwanzeyRiver gauge, Ashuelot River	6.01 ft	Below flood stage	−0.03 ft	12 mi
Ashuelot River at HinsdaleRiver gauge, Ashuelot River	3.83 ft	Below flood stage	−0.06 ft	21 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Cold River at High Street, at AlsteadRiver gauge, Cold River	1.84 ft	Below flood stage	±0	9 mi
Connecticut River at North WalpoleRiver gauge, Connecticut River	6.96 ft	Below flood stage	−0.14 ft	10 mi
Williams River near RockinghamRiver gauge, Williams River	2.35 ft	Below flood stage	−0.10 ft	15 mi
Contoocook River at PeterboroughRiver gauge, Contoocook River	1.72 ft	Below flood stage	−0.06 ft	20 mi
Contoocook River near HennikerRiver gauge, Contoocook River	6.11 ft	Below flood stage	+0.23 ft	22 mi
Black River at North SpringfieldRiver gauge, Black River	97.8 cfs	Normal	−10.2 cfs	24 mi

Questions and answers

What is flood stage for the Ashuelot River near Gilsum?

The official flood stage is 9.50 ft. The level is currently 6.68 ft below it.

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 Ashuelot River near Gilsum today?

On Oct 21, 2026, 03:30 AM EDT, the water level was 2.82 ft. Down 0.07 ft over the last 24 hours.

Is Ashuelot River near Gilsum rising or falling?

Down 0.07 ft over the last 24 hours. Steady over the last 7 days.

Is the level of Ashuelot River near Gilsum normal?

Below flood stage. Judged against the official flood stage for this gauge.

What is the highest water level ever recorded at Ashuelot River near Gilsum?

The highest level on record is 11.36 ft on July 11, 2023.

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.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:01157000 (Agency page)
Coordinates: 43.03925, -72.27009 (WGS84)
Vertical datum: NAVD88
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	2.82 ft	2026-10-21 07:30	Provisional
Flow	98.0 cfs	2026-10-21 07:30	Provisional
Water temperature	47 °F	2026-10-21 07:30	Provisional

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How to cite

U.S. Geological Survey: Ashuelot River near Gilsum (usgs:01157000). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-hampshire/ashuelot-river-near-gilsum

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