How high is the Cockermouth River Below Hardy Brook, at Groton, NH right now?

The Cockermouth River Below Hardy Brook, at Groton, NH is currently flowing at 46 cubic feet per second with a gage height of 1.82 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Cockermouth River Below Hardy Brook, at Groton, NH normal for this time of year?

Current flow is classified as normal for October 28. Today's discharge is at the 54th percentile compared to the long-term historical record at this gauge.

Is the Cockermouth River Below Hardy Brook, at Groton, NH at flood stage?

No — the gage height is 7.68 feet below the NWS flood-stage threshold of 9.5 feet.

What is the historical median flow for the Cockermouth River Below Hardy Brook, at Groton, NH on October 28?

The long-term median discharge for this date is 39 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 4 to unavailable cfs.

Where is the Cockermouth River Below Hardy Brook, at Groton, NH stream gauge located?

The Cockermouth River Below Hardy Brook, at Groton, NH stream gauge is operated by the USGS in Grafton County, NH on the Cockermouth River. USGS site number 01077400 (coordinates 43.7039, -71.8333).

Cockermouth River Below Hardy Brook, at Groton, NH

USGS Site No: 01077400 • Cockermouth River • Grafton County, NH

Cockermouth River Below Hardy Brook, at Groton, NH on the Cockermouth River is currently at 46 cfs (Normal — 54th percentile for this date) . Gage height: 1.82 ft.

Reading from 4 months ago

CFS Discharge

1.82

Gage Height (ft)

Normal

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	4
25th	Low threshold	15
50th (Median)	Normal (median)	39
75th	High threshold	84	Today: 46 cfs
95th	Very High threshold	0

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	51	—
May 27, 2026	61	—
May 26, 2026	89	—
May 25, 2026	149	—
May 24, 2026	58	—
May 23, 2026	44	—
May 22, 2026	47	—
May 21, 2026	51	—
May 20, 2026	57	—
May 19, 2026	66	—
May 18, 2026	77	—
May 17, 2026	99	—
May 16, 2026	155	—
May 15, 2026	492	—
Apr 21, 2026	105	—
Apr 20, 2026	152	—
Apr 19, 2026	178	—
Apr 18, 2026	116	—
Apr 17, 2026	224	—
Apr 16, 2026	66	—
Apr 15, 2026	78	—
Apr 14, 2026	60	—
Apr 13, 2026	51	—
Apr 12, 2026	44	—
Apr 11, 2026	54	—
Apr 10, 2026	50	—
Apr 9, 2026	53	—
Apr 8, 2026	56	—
Apr 7, 2026	67	—
Apr 6, 2026	101	—

Station Information

USGS Site No: 01077400
State: NH
County: Grafton County
Coordinates: 43.7039, -71.8333
Drainage Area: 21 mi²
Datum (ft): 608.4
HUC Code: 01070001

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 8.5 ft
Flood Stage: 9.5 ft
Moderate Flood: 10.0 ft
Major Flood: 12.0 ft

Currently 7.68 ft below flood stage.

Recent Extremes

Max discharge: 580 cfs

May 10, 2025
Min discharge: 0 cfs

Sep 14, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Baker River Near Rumney, NH
6.4 mi · 177 cfs

Normal
Pemigewasset River at Plymouth, NH
8.3 mi · 914 cfs

Normal
Smith River Near Bristol, NH
10.4 mi · 108 cfs

Normal
Pemigewasset River at Woodstock, NH
20.3 mi · 364 cfs

Normal
Merrimack River at Franklin Junction, NH
21.4 mi · 3,570 cfs

High