RIVER GAUGE · COCKERMOUTH RIVER
Cockermouth River at Groton
Grafton County, New Hampshire
Water level1.21 ft
Flow4 cfs
Last readingSep 16, 2026, 5:00 PM UTC (last recorded)
Action8.5 ft
Minor flood9.5 ft
Moderate flood10 ft
Major flood12 ft
The past week
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What floods at each level
- 12 ft
Major flooding occurs. Comparable to July 2019 flood.
- 10 ft
Moderate flooding occurs. Sculptured Rocks Road flooded north of Groton.
- 9.5 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 ft
Flooding occurs in Grey Rocks Conservation area.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Oct 29, 2017 | 11.82 ft | 7,900 cfs |
| Aug 27, 2011 | 11.17 ft | 5,260 cfs |
| Dec 22, 2022 | 9.75 ft | 3,500 cfs |
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