Assabet River at Maynard, MA
River level and flood forecast · Middlesex County
The river is 2.2 ft below flood stage (5 ft).
Forecast to fall to 2.4 ft by Thu, Oct 15, 8 AM.
Flow: 224 cubic feet per second (USGS).
Much higher than normal for October 13.
Usual for October 13: 30 to 103 cubic feet per second (the middle half of 85 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 Assabet River at Maynard to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 7 ft |
| Moderate flood stage | 6 ft |
| Flood stage | 5 ft |
| Action stage | 4.5 ft |
| Record crest (August 20, 1955) | 8.94 ft |
What floods at each level
From the National Weather Service, highest first.
- 7 ftSignificant flooding will affect interests along the river in Maynard, Concord and Hudson. Roadways may become impassable due to flood waters and some properties may need to be evacuated. Follow the directions of local emergency management officials.
- 6 ftFlooding is likely in low lying sections along the river including portions of Maynard, Hudson and Concord. Water may approach homes along the river and may force several localized road closures.
- 5 ftMinor lowland and backyard flooding is likely along reaches of the river in Maynard, Concord as well as Hudson. Several river roads may also become covered in water.
Highest crests on record
- 8.94 ft — August 20, 1955
- 8.15 ft — March 19, 1968
- 8.11 ft — January 26, 1979
- 7.17 ft — April 7, 1987
- 7.14 ft — March 16, 2010
Recent crests: 5.6 ft (January 12, 2024) · 5.94 ft (December 20, 2023) · 5.14 ft (March 15, 2023) · 5.27 ft (September 3, 2021) · 5.13 ft (November 28, 2018)
Highest flow on record
4,250 cubic feet per second — August 20, 1955. From the USGS's yearly peaks since 1942.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MAYM3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.