Country: Canada
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Athapapuskow Lake water level history

Daily records since 1948 · Level today: 291.859 m

Highest on record
292.340 m
Aug 1, 1966
Lowest on record
291.392 m
Apr 28, 1949
Today
291.859 m
Oct 23, 2026
Years of data
78
since 1948

In short

Across 18 complete years, 1949 had the lowest average level (291.576 m) and 1996 the highest (291.996 m).

On average the lake is lowest in November (291.744 m) and highest in July (291.933 m).

Athapapuskow Lake level, all years

Loading chart…

Measured Normal range for the date (middle 50% of past years)

Each year's lowest and highest level

291.3291.6291.9292.1292.41948195819681978198819982008201820261948: lowest 291.42 m (1948-12-24), highest 291.86 m (1948-06-29), average 291.63 m, 191 days measured1949: lowest 291.39 m (1949-04-28), highest 291.86 m (1949-07-26), average 291.58 m, 358 days measured1950: lowest 291.46 m (1950-05-07), highest 291.89 m (1950-12-31), average 291.67 m, 360 days measured1951: lowest 291.67 m (1951-12-27), highest 292.05 m (1951-07-17), average 291.86 m, 332 days measured1952: lowest 291.57 m (1952-12-27), highest 291.91 m (1952-07-01), average 291.69 m, 344 days measured1953: lowest 291.58 m (1953-01-01), highest 291.83 m (1953-07-14), average 291.68 m, 279 days measured1954: lowest 291.67 m (1954-01-03), highest 291.91 m (1954-06-20), average 291.80 m, 116 days measured1955: lowest 291.58 m (1955-11-22), highest 292.08 m (1955-05-29), average 291.78 m, 42 days measured1956: lowest 291.54 m (1956-12-17), highest 291.80 m (1956-07-22), average 291.64 m, 53 days measured1957: lowest 291.49 m (1957-12-14), highest 291.84 m (1957-07-05), average 291.66 m, 91 days measured1958: lowest 291.50 m (1958-01-18), highest 291.81 m (1958-08-01), average 291.69 m, 104 days measured1959: lowest 291.68 m (1959-12-21), highest 292.08 m (1959-07-01), average 291.84 m, 93 days measured1960: lowest 291.57 m (1960-11-24), highest 291.97 m (1960-06-30), average 291.70 m, 99 days measured1961: lowest 291.59 m (1961-10-27), highest 291.85 m (1961-07-13), average 291.69 m, 68 days measured1962: lowest 291.63 m (1962-01-28), highest 292.09 m (1962-06-18), average 291.78 m, 100 days measured1963: lowest 291.65 m (1963-11-23), highest 292.11 m (1963-06-30), average 291.85 m, 66 days measured1964: lowest 291.71 m (1964-02-20), highest 292.08 m (1964-10-26), average 291.85 m, 57 days measured1965: lowest 291.76 m (1965-12-30), highest 292.15 m (1965-07-24), average 291.93 m, 55 days measured1966: lowest 291.71 m (1966-05-17), highest 292.34 m (1966-08-01), average 291.90 m, 55 days measured1967: lowest 291.62 m (1967-11-22), highest 291.99 m (1967-07-23), average 291.79 m, 57 days measured1968: lowest 291.64 m (1968-01-06), highest 291.82 m (1968-07-08), average 291.71 m, 55 days measured1969: lowest 291.73 m (1969-08-30), highest 291.90 m (1969-05-10), average 291.83 m, 57 days measured1970: lowest 291.75 m (1970-10-24), highest 292.18 m (1970-07-22), average 291.88 m, 57 days measured1971: lowest 291.74 m (1971-09-21), highest 291.91 m (1971-12-29), average 291.82 m, 56 days measured1972: lowest 291.76 m (1972-04-14), highest 291.96 m (1972-07-12), average 291.85 m, 57 days measured1973: lowest 291.67 m (1973-11-17), highest 292.15 m (1973-07-07), average 291.84 m, 54 days measured1974: lowest 291.71 m (1974-12-07), highest 292.06 m (1974-06-12), average 291.84 m, 57 days measured1975: lowest 291.70 m (1975-03-21), highest 292.19 m (1975-06-28), average 291.83 m, 55 days measured1976: lowest 291.58 m (1976-04-17), highest 292.13 m (1976-08-07), average 291.81 m, 56 days measured1977: lowest 291.65 m (1977-04-15), highest 291.95 m (1977-07-22), average 291.81 m, 55 days measured1978: lowest 291.69 m (1978-04-21), highest 291.83 m (1978-12-30), average 291.76 m, 54 days measured1979: lowest 291.72 m (1979-12-28), highest 292.04 m (1979-06-28), average 291.82 m, 57 days measured1980: lowest 291.71 m (1980-01-03), highest 291.84 m (1980-12-12), average 291.79 m, 55 days measured1981: lowest 291.64 m (1981-10-10), highest 291.91 m (1981-06-20), average 291.79 m, 57 days measured1982: lowest 291.68 m (1982-01-02), highest 292.03 m (1982-06-25), average 291.85 m, 127 days measured1983: lowest 291.78 m (1983-12-31), highest 292.12 m (1983-07-22), average 291.92 m, 352 days measured1984: lowest 291.70 m (1984-03-24), highest 292.01 m (1984-06-25), average 291.84 m, 330 days measured1985: lowest 291.71 m (1985-11-24), highest 292.19 m (1985-07-04), average 291.93 m, 365 days measured1986: lowest 291.75 m (1986-01-02), highest 292.07 m (1986-06-12), average 291.86 m, 346 days measured1987: lowest 291.70 m (1987-11-14), highest 291.91 m (1987-06-02), average 291.82 m, 365 days measured1988: lowest 291.65 m (1988-12-10), highest 291.90 m (1988-07-19), average 291.79 m, 366 days measured1989: lowest 291.63 m (1989-11-16), highest 291.77 m (1989-07-09), average 291.69 m, 365 days measured1990: lowest 291.65 m (1990-10-02), highest 291.97 m (1990-06-15), average 291.77 m, 365 days measured1991: lowest 291.69 m (1991-01-06), highest 291.94 m (1991-07-05), average 291.78 m, 365 days measured1992: lowest 291.76 m (1992-01-02), highest 292.06 m (1992-07-17), average 291.90 m, 366 days measured1993: lowest 291.84 m (1993-11-22), highest 292.16 m (1993-07-31), average 291.93 m, 365 days measured1994: lowest 291.80 m (1994-11-01), highest 292.04 m (1994-07-22), average 291.90 m, 365 days measured1995: lowest 291.82 m (1995-02-04), highest 292.03 m (1995-08-19), average 291.91 m, 365 days measured1996: lowest 291.87 m (1996-10-11), highest 292.28 m (1996-06-21), average 292.00 m, 366 days measured1997: lowest 291.90 m (1997-01-01), highest 292.05 m (1997-05-31), average 291.95 m, 151 days measured2026: lowest 291.87 m (2026-10-09), highest 291.94 m (2026-09-27), average 291.90 m, 30 days measured
291.3291.6291.9292.1292.4194819681988200820261948: lowest 291.42 m (1948-12-24), highest 291.86 m (1948-06-29), average 291.63 m, 191 days measured1949: lowest 291.39 m (1949-04-28), highest 291.86 m (1949-07-26), average 291.58 m, 358 days measured1950: lowest 291.46 m (1950-05-07), highest 291.89 m (1950-12-31), average 291.67 m, 360 days measured1951: lowest 291.67 m (1951-12-27), highest 292.05 m (1951-07-17), average 291.86 m, 332 days measured1952: lowest 291.57 m (1952-12-27), highest 291.91 m (1952-07-01), average 291.69 m, 344 days measured1953: lowest 291.58 m (1953-01-01), highest 291.83 m (1953-07-14), average 291.68 m, 279 days measured1954: lowest 291.67 m (1954-01-03), highest 291.91 m (1954-06-20), average 291.80 m, 116 days measured1955: lowest 291.58 m (1955-11-22), highest 292.08 m (1955-05-29), average 291.78 m, 42 days measured1956: lowest 291.54 m (1956-12-17), highest 291.80 m (1956-07-22), average 291.64 m, 53 days measured1957: lowest 291.49 m (1957-12-14), highest 291.84 m (1957-07-05), average 291.66 m, 91 days measured1958: lowest 291.50 m (1958-01-18), highest 291.81 m (1958-08-01), average 291.69 m, 104 days measured1959: lowest 291.68 m (1959-12-21), highest 292.08 m (1959-07-01), average 291.84 m, 93 days measured1960: lowest 291.57 m (1960-11-24), highest 291.97 m (1960-06-30), average 291.70 m, 99 days measured1961: lowest 291.59 m (1961-10-27), highest 291.85 m (1961-07-13), average 291.69 m, 68 days measured1962: lowest 291.63 m (1962-01-28), highest 292.09 m (1962-06-18), average 291.78 m, 100 days measured1963: lowest 291.65 m (1963-11-23), highest 292.11 m (1963-06-30), average 291.85 m, 66 days measured1964: lowest 291.71 m (1964-02-20), highest 292.08 m (1964-10-26), average 291.85 m, 57 days measured1965: lowest 291.76 m (1965-12-30), highest 292.15 m (1965-07-24), average 291.93 m, 55 days measured1966: lowest 291.71 m (1966-05-17), highest 292.34 m (1966-08-01), average 291.90 m, 55 days measured1967: lowest 291.62 m (1967-11-22), highest 291.99 m (1967-07-23), average 291.79 m, 57 days measured1968: lowest 291.64 m (1968-01-06), highest 291.82 m (1968-07-08), average 291.71 m, 55 days measured1969: lowest 291.73 m (1969-08-30), highest 291.90 m (1969-05-10), average 291.83 m, 57 days measured1970: lowest 291.75 m (1970-10-24), highest 292.18 m (1970-07-22), average 291.88 m, 57 days measured1971: lowest 291.74 m (1971-09-21), highest 291.91 m (1971-12-29), average 291.82 m, 56 days measured1972: lowest 291.76 m (1972-04-14), highest 291.96 m (1972-07-12), average 291.85 m, 57 days measured1973: lowest 291.67 m (1973-11-17), highest 292.15 m (1973-07-07), average 291.84 m, 54 days measured1974: lowest 291.71 m (1974-12-07), highest 292.06 m (1974-06-12), average 291.84 m, 57 days measured1975: lowest 291.70 m (1975-03-21), highest 292.19 m (1975-06-28), average 291.83 m, 55 days measured1976: lowest 291.58 m (1976-04-17), highest 292.13 m (1976-08-07), average 291.81 m, 56 days measured1977: lowest 291.65 m (1977-04-15), highest 291.95 m (1977-07-22), average 291.81 m, 55 days measured1978: lowest 291.69 m (1978-04-21), highest 291.83 m (1978-12-30), average 291.76 m, 54 days measured1979: lowest 291.72 m (1979-12-28), highest 292.04 m (1979-06-28), average 291.82 m, 57 days measured1980: lowest 291.71 m (1980-01-03), highest 291.84 m (1980-12-12), average 291.79 m, 55 days measured1981: lowest 291.64 m (1981-10-10), highest 291.91 m (1981-06-20), average 291.79 m, 57 days measured1982: lowest 291.68 m (1982-01-02), highest 292.03 m (1982-06-25), average 291.85 m, 127 days measured1983: lowest 291.78 m (1983-12-31), highest 292.12 m (1983-07-22), average 291.92 m, 352 days measured1984: lowest 291.70 m (1984-03-24), highest 292.01 m (1984-06-25), average 291.84 m, 330 days measured1985: lowest 291.71 m (1985-11-24), highest 292.19 m (1985-07-04), average 291.93 m, 365 days measured1986: lowest 291.75 m (1986-01-02), highest 292.07 m (1986-06-12), average 291.86 m, 346 days measured1987: lowest 291.70 m (1987-11-14), highest 291.91 m (1987-06-02), average 291.82 m, 365 days measured1988: lowest 291.65 m (1988-12-10), highest 291.90 m (1988-07-19), average 291.79 m, 366 days measured1989: lowest 291.63 m (1989-11-16), highest 291.77 m (1989-07-09), average 291.69 m, 365 days measured1990: lowest 291.65 m (1990-10-02), highest 291.97 m (1990-06-15), average 291.77 m, 365 days measured1991: lowest 291.69 m (1991-01-06), highest 291.94 m (1991-07-05), average 291.78 m, 365 days measured1992: lowest 291.76 m (1992-01-02), highest 292.06 m (1992-07-17), average 291.90 m, 366 days measured1993: lowest 291.84 m (1993-11-22), highest 292.16 m (1993-07-31), average 291.93 m, 365 days measured1994: lowest 291.80 m (1994-11-01), highest 292.04 m (1994-07-22), average 291.90 m, 365 days measured1995: lowest 291.82 m (1995-02-04), highest 292.03 m (1995-08-19), average 291.91 m, 365 days measured1996: lowest 291.87 m (1996-10-11), highest 292.28 m (1996-06-21), average 292.00 m, 366 days measured1997: lowest 291.90 m (1997-01-01), highest 292.05 m (1997-05-31), average 291.95 m, 151 days measured2026: lowest 291.87 m (2026-10-09), highest 291.94 m (2026-09-27), average 291.90 m, 30 days measured
Lowest to highest that yearYear average2026 so far

One bar per year from the lowest to the highest daily level, with the year's average. Years with no bar have no daily record in the agency archive.

Lowest years

Years ranked by their lowest daily level.

  • 1949291.392 m on Apr 28
  • 1950291.459 m on May 7
  • 1952291.569 m on Dec 27
  • 1989291.634 m on Nov 16
  • 1988291.653 m on Dec 10

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)291.897291.866Oct 9291.944Sep 27
1997 (151 days)291.946291.898Jan 1292.054May 31
1996291.996291.867Oct 11292.282Jun 21
1995291.912291.815Feb 4292.030Aug 19
1994291.899291.804Nov 1292.035Jul 22
1993291.933291.843Nov 22292.158Jul 31
1992291.895291.758Jan 2292.061Jul 17
1991291.781291.685Jan 6291.936Jul 5
1990291.774291.654Oct 2291.973Jun 15
1989291.687291.634Nov 16291.767Jul 9
1988291.786291.653Dec 10291.896Jul 19
1987291.821291.700Nov 14291.913Jun 2
1986291.864291.746Jan 2292.066Jun 12
1985291.930291.709Nov 24292.195Jul 4
1984291.836291.695Mar 24292.012Jun 25
1983291.920291.776Dec 31292.120Jul 22
1982 (127 days)291.847291.681Jan 2292.026Jun 25
1981 (57 days)291.788291.639Oct 10291.911Jun 20
1980 (55 days)291.793291.715Jan 3291.842Dec 12
1979 (57 days)291.822291.718Dec 28292.037Jun 28
1978 (54 days)291.763291.691Apr 21291.834Dec 30
1977 (55 days)291.806291.648Apr 15291.953Jul 22
1976 (56 days)291.809291.578Apr 17292.133Aug 7
1975 (55 days)291.827291.700Mar 21292.187Jun 28
1974 (57 days)291.836291.709Dec 7292.056Jun 12
1973 (54 days)291.843291.669Nov 17292.145Jul 7
1972 (57 days)291.849291.755Apr 14291.959Jul 12
1971 (56 days)291.824291.736Sep 21291.910Dec 29
1970 (57 days)291.877291.748Oct 24292.184Jul 22
1969 (57 days)291.835291.727Aug 30291.904May 10
1968 (55 days)291.709291.639Jan 6291.816Jul 8
1967 (57 days)291.792291.623Nov 22291.986Jul 23
1966 (55 days)291.896291.712May 17292.340Aug 1
1965 (55 days)291.932291.755Dec 30292.145Jul 24
1964 (57 days)291.852291.706Feb 20292.078Oct 26
1963 (66 days)291.849291.654Nov 23292.114Jun 30
1962 (100 days)291.775291.633Jan 28292.093Jun 18
1961 (68 days)291.694291.587Oct 27291.849Jul 13
1960 (99 days)291.704291.569Nov 24291.965Jun 30
1959 (93 days)291.837291.675Dec 21292.081Jul 1
1958 (104 days)291.689291.502Jan 18291.806Aug 1
1957 (91 days)291.655291.492Dec 14291.840Jul 5
1956 (53 days)291.636291.538Dec 17291.800Jul 22
1955 (42 days)291.779291.575Nov 22292.081May 29
1954 (116 days)291.797291.669Jan 3291.910Jun 20
1953 (279 days)291.679291.578Jan 1291.831Jul 14
1952291.692291.569Dec 27291.907Jul 1
1951291.863291.669Dec 27292.047Jul 17
1950291.668291.459May 7291.889Dec 31
1949291.576291.392Apr 28291.855Jul 26
1948 (191 days)291.633291.419Dec 24291.864Jun 29

Levels in metres. Partial years show the number of days with data.

Monthly averages

MonthAverageLowestHighest
January291.758291.413291.959
February291.763291.419291.962
March291.761291.419291.971
April291.768291.392291.986
May291.842291.444292.157
June291.914291.541292.282
July291.933291.660292.337
August291.888291.652292.340
September291.827291.608292.175
October291.778291.526292.078
November291.744291.450292.069
December291.749291.419291.995

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Daily levels as CSV (9,056 rows; credit the original agencies listed below)