Cockermouth River below Hardy Brook, at Groton water level

Name: Cockermouth River below Hardy Brook, at Groton 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, Cockermouth River, New Hampshire, United States

Directions

Below flood stage

Water level

1.46ft Down 0.06 ft over the last 24 hours

Measured Oct 21, 2026, 01:00 AM EDT (1 hour ago)

Flow: 11.0 cfs

History

7 days

Water level Minor flood stage

What this means

The Cockermouth River below Hardy Brook, at Groton is at 1.46 ft, in the normal range.

It is 8.04 ft below the flood stage of 9.50 ft.

It has dropped 0.06 ft over the past 24 hours. In the last month it has stayed between 1.46 ft and 2.04 ft.

Fall is often low-water season on rivers, until steadier rain returns.

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

Key numbers

Highest on record: 11.82 ftOctober 30, 2017

Floating and fishing near Cockermouth River below Hardy Brook, at Groton

Normal flows mean predictable rapids and good access at most put-ins.

Flood stage here is 9.50 ft, 8.04 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

12.00 ft: Major flooding occurs. Comparable to July 2019 flood.
10.00 ft: Moderate flooding occurs. Sculptured Rocks Road flooded north of Groton.
9.50 ft: Minor flooding occurs. North Shore Road from Grey Rocks Road to Cross Road flooded in Hebron. Braley Road north of Groton Road also flooded in Hebron.
9.00 ft: Flooding occurs in Grey Rocks Conservation area.
1.46 ft: Right now

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

Highest crests on record

Rank	Level	Date
1	11.82 ft	October 30, 2017
2	11.17 ft	August 28, 2011
3	9.75 ft	December 23, 2022
4	9.25 ft	December 18, 2023

Weather at the gauge

The forecast is not available right now.

Sunrise 07:10 AM Sunset 05:56 PM Daylight 10 hr, 46 min Waxing gibbous 75%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Baker River near RumneyRiver gauge, Baker River	0.61 ft	Below flood stage	−0.09 ft	6 mi
Pemigewasset River at PlymouthRiver gauge, Pemigewasset River	0.95 ft	Below flood stage	−0.09 ft	8 mi
Smith River near BristolRiver gauge, Smith River	2.05 ft	Below flood stage	−0.07 ft	10 mi
Pemigewasset River at WoodstockRiver gauge, Pemigewasset River	2.61 ft	Below flood stage	−0.08 ft	20 mi
Merrimack River at Franklin JunctionRiver gauge, Merrimack River	4.59 ft	Below flood stage	−0.02 ft	21 mi
Ompompanoosuc River at Union VillageRiver gauge, Ompompanoosuc River	48.9 cfs	Normal	−5.1 cfs	22 mi
Winnipesaukee River at TiltonRiver gauge, Winnipesaukee River	2.70 ft	Below flood stage	−0.16 ft	22 mi
Connecticut River at West LebanonRiver gauge, Connecticut River	4.60 ft	Below flood stage	−0.34 ft	24 mi

Questions and answers

What is flood stage for the Cockermouth River below Hardy Brook, at Groton?

The official flood stage is 9.50 ft. The level is currently 8.04 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 Cockermouth River below Hardy Brook, at Groton today?

On Oct 21, 2026, 01:00 AM EDT, the water level was 1.46 ft. Down 0.06 ft over the last 24 hours.

Is Cockermouth River below Hardy Brook, at Groton rising or falling?

Down 0.06 ft over the last 24 hours. Down 0.30 ft over the last 7 days.

Is the level of Cockermouth River below Hardy Brook, at Groton normal?

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

What is the highest water level ever recorded at Cockermouth River below Hardy Brook, at Groton?

The highest level on record is 11.82 ft on October 30, 2017.

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:01077400 (Agency page)
Coordinates: 43.70389, -71.83333 (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	1.46 ft	2026-10-21 05:00	Provisional
Flow	11.0 cfs	2026-10-21 05:00	Provisional

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How to cite

U.S. Geological Survey: Cockermouth River below Hardy Brook, at Groton (usgs:01077400). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/new-hampshire/cockermouth-river-below-hardy-brook-at-groton

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