Charles River

Last Updated: April 25, 2026

Total streamflow across the Charles River was last observed at 693 cfs, and is expected to yield approximately 1,375 acre-ft of water today; about 45% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,539 cfs, with recent peaks last observed on 2024-01-14 when daily discharge volume was observed at 5,509 cfs.

Maximum discharge along the river is currently at the Charles River At Dover reporting a streamflow rate of 215 cfs. However, the streamgauge with the highest stage along the river is the Charles River At Wellesley with a gauge stage of 3.22 ft. This river is monitored from 4 different streamgauging stations along the Charles River, the highest being situated at an altitude of 129 ft, the Charles River At Medway.

The Charles River is a 80-mile long river in Massachusetts that runs from Hopkinton to Boston and empties into the Atlantic Ocean.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-24
Discharge Volume 1,375 ACRE-FT
Streamflow 693.0 cfs
Past 24 Hours: -96.6 cfs (-12.23%)
Percent of Normal 45.03%
Maximum 5,509.0 cfs
2024-01-14
Seasonal Avg 1,539 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Charles River At Medway
USGS 01103280
79 cfs 1.28 ft -7.37
Charles River At Dover
USGS 01103500
215 cfs 1.28 ft -8.57
Charles River At Wellesley
USGS 01104200
160 cfs 3.22 ft -17.06
Charles River At Waltham
USGS 01104500
186 cfs 1.54 ft -13.52
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Charles River (sometimes called the River Charles or simply the Charles) is an 80-mile-long (129 km) long river in eastern Massachusetts. From its source in Hopkinton the river's mouth is northeast of its headwaters, though it follows a highly meandering route, doubling back on itself several times and traveling through 23 cities and towns before reaching the Atlantic Ocean at Boston. The Native-American name for the Charles River was Quinobequin, meaning "meandering".