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Glastonbury Marina

Willimantic River near Glastonbury, CT

River24.9 mi

Around here

Around Willimantic River

Wilderness Lake Campground & Resort2 miMoosemeadow Camping Resort5.2 mi5 mi

Data Source: Recreation.gov · Source: USGS GNIS · Public land: USGS PAD-US

About this river

Willimantic River is a 24.9 mile river near Glastonbury Marina in Connecticut. Streamflow is measured at the USGS gauge Willimantic River near Coventry, CT (site 01119500). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.

Typical flow by month

1932 to 2026

Willimantic River typically runs highest in March, at a median 339 cfs, and lowest in September, at 45 cfs. The highest flow on record for any single day is 12,900 cfs, in 1938.

Show the numbers
Typical flow by month at Willimantic River near Coventry, CT, in cfs
MonthTypical (cfs)Usual range (cfs)
January195128 to 308
February209135 to 328
March339237 to 486
April322228 to 472
May219158 to 320
June12078 to 197
July6237 to 113
August4928 to 87
September4528 to 87
October6638 to 131
November12373 to 239
December187105 to 313

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 95 years of record. Statistics published by the US Geological Survey for Willimantic River near Coventry, CT (site 01119500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

Boat access nearby

One mapped launch sits in the mapped area of Willimantic River. Ramp data comes from the USGS national boat-ramp inventory.

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