Connecticut River River Levels

Last Updated: December 29, 2025

The Connecticut River is the longest river in New England, stretching for 410 miles from its source in New Hampshire to its mouth at Long Island Sound.


Summary

Total streamflow across the Connecticut River was last observed at 26,233 cfs, and is expected to yield approximately 52,033 acre-ft of water today; about 20% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 131,623 cfs, with recent peaks last observed on 2014-04-17 when daily discharge volume was observed at 548,550 cfs.

Maximum discharge along the river is currently at the Connecticut River At Thompsonville reporting a streamflow rate of 13,300 cfs. This is also the highest stage along the Connecticut River, with a gauge stage of 8.94 ft at this location. This river is monitored from 10 different streamgauging stations along the Connecticut River, the highest being situated at an altitude of 1,211 ft, the Connecticut R Below Indian Stream Nr Pittsburg.

River Details

Last Updated 2025-12-29
Discharge Volume 52,033 ACRE-FT
Streamflow 26,233.0 cfs
-14590.0 cfs (-35.74%)
Percent of Normal 19.93%
Maximum 548,550.0 cfs
2014-04-17
Seasonal Avg 131,623 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Connecticut R Below Indian Stream Nr Pittsburg
USGS 01129200
213 cfs 2.45 ft -4.48
Connecticut River At North Stratford
USGS 01129500
4920 cfs 6.4 ft -2.57
Connecticut River Near Dalton
USGS 01131500
1220 cfs 8.1 ft -0.81
Connecticut River At Wells River
USGS 01138500
1950 cfs 2.79 ft 8.33
Connecticut River At West Lebanon
USGS 01144500
2100 cfs 4.81 ft -25.27
Connecticut River At North Walpole
USGS 01154500
1910 cfs 6.19 ft -2.05
Connecticut River At Montague City
USGS 01170500
2720 cfs 6.94 ft -37.61
Connecticut R At Interstate 391 Bridge At Holyoke
USGS 01172010
10100 cfs 7.55 ft 23.93
Connecticut River At Thompsonville
USGS 01184000
13300 cfs 8.94 ft 85.5
Connecticut R At Middle Haddam
USGS 01193050
11200 cfs 1.16 ft 321.05
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Connecticut River is the longest river in the New England region of the United States, flowing roughly southward for 406 miles (653 km) through four states. It rises at the U.S. border with Quebec, Canada, and discharges at Long Island Sound. Its watershed encompasses five U.S. states and one Canadian province, 11,260 square miles (29,200 km2) via 148 tributaries, 38 of which are major rivers. It produces 70% of Long Island Sound's fresh water, discharging at 19,600 cubic feet (560 m3) per second.The Connecticut River Valley is home to some of the northeastern United States' most productive farmland, as well as a metropolitan region of approximately two million people surrounding Springfield, Massachusetts and Hartford, Connecticut.