Charles River River Levels

Last Updated: February 21, 2026

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


Summary

Total streamflow across the Charles River was last observed at 258 cfs, and is expected to yield approximately 512 acre-ft of water today; about 21% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 1,208 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 Wellesley reporting a streamflow rate of 131 cfs. This is also the highest stage along the Charles River, with a gauge stage of 3.14 ft at this location. 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.




15-Day Weather Outlook


River Details

Last Updated 2026-02-21
Discharge Volume 512 ACRE-FT
Streamflow 258.0 cfs
+18.0 cfs (+7.5%)
Percent of Normal 21.36%
Maximum 5,509.0 cfs
2024-01-14
Seasonal Avg 1,208 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Charles River At Medway
USGS 01103280
100 cfs 1.49 ft 55.52
Charles River At Dover
USGS 01103500
127 cfs 1.05 ft 6.72
Charles River At Wellesley
USGS 01104200
131 cfs 3.14 ft 8.26
Charles River At Waltham
USGS 01104500
108 cfs 1.23 ft 12.73
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".