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Attawapiskat River in Ontario

River48.9 mi
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Around Attawapiskat River

10 mi

About this river

Attawapiskat River is a 48.9 mile river. Streamflow is measured at the Water Survey of Canada gauge Attawapiskat River below Attawapiskat Lake (site 04FB001). Reach geometry comes from Natural Resources Canada's National Hydro Network.

Typical flow by month

1965 to 2024

Attawapiskat River typically runs highest in May, at a median 18,487 cfs, and lowest in March, at 1,866 cfs. The highest flow on record for any single day is 60,741 cfs, in 1985.

Show the numbers
Typical flow by month at Attawapiskat River below Attawapiskat Lake, in cfs
MonthTypical (cfs)Usual range (cfs)
January3,4332,630 to 3,964
February2,4161,904 to 2,868
March1,8661,635 to 2,148
April1,8741,577 to 2,092
May18,48710,700 to 25,586
June17,49011,773 to 24,138
July9,9067,637 to 13,252
August7,2044,926 to 11,115
September7,6814,370 to 11,548
October9,0055,818 to 13,455
November7,5935,619 to 12,272
December5,0853,779 to 6,242

Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 42 years of record. Statistics published by the US Geological Survey for Attawapiskat River below Attawapiskat Lake (site 04FB001). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.

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