About this river
Squannacook River is a 9.5 mile river near Nashoba Paddler, LLC in Massachusetts. Streamflow is measured at the USGS gauge Squannacook River near West Groton, MA (site 01096000). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1950 to 2026
Squannacook River typically runs highest in April, at a median 205 cfs, and lowest in September, at 17 cfs. The highest flow on record for any single day is 3,640 cfs, in 2010.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 91 | 58 to 145 | |
| February | 92 | 63 to 148 | |
| March | 162 | 109 to 263 | |
| April | 205 | 130 to 308 | |
| May | 113 | 80 to 174 | |
| June | 54 | 33 to 92 | |
| July | 26 | 17 to 42 | |
| August | 20 | 13 to 35 | |
| September | 17 | 11 to 27 | |
| October | 26 | 15 to 52 | |
| November | 59 | 29 to 120 | |
| December | 92 | 52 to 159 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 77 years of record. Statistics published by the US Geological Survey for Squannacook River near West Groton, MA (site 01096000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Squannacook River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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