Aroostook River

Last Updated: April 19, 2026

Total streamflow across the Aroostook River was last observed at 34,100 cfs, and is expected to yield approximately 67,637 acre-ft of water today; about 137% of normal. River levels are high. Average streamflow for this time of year is 24,968 cfs, with recent peaks last observed on 2018-04-28 when daily discharge volume was observed at 63,100 cfs.

Maximum discharge along the river is currently at the Aroostook River At Washburn reporting a streamflow rate of 23,400 cfs. However, the streamgauge with the highest stage along the river is the Aroostook River Near Masardis with a gauge stage of 12.45 ft. This river is monitored from 2 different streamgauging stations along the Aroostook River, the highest being situated at an altitude of 542 ft, the Aroostook River Near Masardis.

The Aroostook River, located in Maine, is approximately 110 miles long and flows into the St.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-19
Discharge Volume 67,637 ACRE-FT
Streamflow 34,100.0 cfs
Past 24 Hours: +1900.0 cfs (+5.9%)
Percent of Normal 136.57%
Maximum 63,100.0 cfs
2018-04-28
Seasonal Avg 24,968 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Aroostook River Near Masardis
USGS 01015800
10700 cfs 12.45 ft 3.88
Aroostook River At Washburn
USGS 01017000
23400 cfs 9.84 ft 6.85
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Aroostook River is a 112-mile-long (180 km) tributary of the Saint John River in the U.S. state of Maine and the Canadian province of New Brunswick. Its basin is the largest sub-drainage of the Saint John River.