Aroostook River

Last Updated: May 10, 2026

Total streamflow across the Aroostook River was last observed at 20,220 cfs, and is expected to yield approximately 40,106 acre-ft of water today; about 182% of normal. River levels are high. Average streamflow for this time of year is 11,082 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 13,300 cfs. However, the streamgauge with the highest stage along the river is the Aroostook River Near Masardis with a gauge stage of 10.19 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 2026-05-09
Discharge Volume 40,106 ACRE-FT
Streamflow 20,220.0 cfs
Past 24 Hours: -1840.0 cfs (-8.34%)
Percent of Normal 182.46%
Maximum 63,100.0 cfs
2018-04-28
Seasonal Avg 11,082 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Aroostook River Near Masardis
USGS 01015800
6920 cfs 10.19 ft -9.66
Aroostook River At Washburn
USGS 01017000
13300 cfs 7.52 ft -7.64
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.