Souhegan River at Milford, NH
River level and flood forecast · Hillsborough County
The river is 5.2 ft below flood stage (9 ft).
Forecast to rise to 4.1 ft Wed 8 AM, below the 9 ft flood stage.
Flow: 99 cubic feet per second (USGS).
Higher than normal for October 13.
Usual for October 13: 16 to 71 cubic feet per second (the middle half of 20 years).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 11:14 AM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Souhegan River at Milford to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 12 ft |
| Moderate flood stage | 11 ft |
| Flood stage | 9 ft |
| Action stage | 8 ft |
| Record crest (April 16, 2007) | 12.49 ft |
What floods at each level
From the National Weather Service, highest first.
- 12.5 ftIn Milford numerous locations along route 101A are impacted including Granite Town Plaza, Brookstone Manor Apartments, Route 101A, and Keyes Memorial Park. Significant flooding occurs at the Boys and Girls Club. Access is blocked to the lowest lying buildings on North River Road. Homes flood at the end of Bridge Street. The first main floors of buildings near the stone bridge flood. Swaths of farmland are inundated. In Wilton affected areas include Monadnock Water, Intervale Road, and Route 31.
- 11 ftFloodwaters encroach on low lying businesses and residences off of Route 101A/Elm Street. This includes Brookstone Manor apartments. A portion of Route 101A floods. Floodwaters inundate a portion of the Milford Drive In. In Wilton, floodwaters affect low lying properties on Intervale road as well as Monadnock Water.
- 10 ftFloodwaters inundate a portion of Route 101A in Milford and spread into property of the Milford water utilities department and Granite Town Plaza. Floodwaters encroach on low lying properties in Wilton including some on Intervale Road and Monadnock Water.
- 9.5 ftWater begins to flood a portion of Route 101A in Milford. Water begins to flood the property of the Milford water utilities department, properties on Intervale Road in Wilton, and the Monadnock Water parking lot.
- 9 ftFloodwaters begin to spill into the Milford Drive. Floodwaters encroach on properties on Intervale Road in Wilton and the Monadnock Water parking lot.
Highest crests on record
- 12.49 ft — April 16, 2007
- 11.17 ft — October 30, 2017
- 9.93 ft — April 14, 2010
- 9.82 ft — December 18, 2023
- 9.76 ft — December 23, 2022
Recent crests: 8.8 ft (May 10, 2025) · 9.82 ft (December 18, 2023) · 9.76 ft (December 23, 2022) · 11.17 ft (October 30, 2017) · 9.2 ft (March 7, 2011)
Highest flow on record
6,950 cubic feet per second — April 16, 2007. From the USGS's yearly peaks since 1994.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MFDN3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.