Country: Canada
United StatesCanadaUnited Kingdom

Grand Lake water level history

Daily records since 1965 · Level today: 0.792 m

Highest on record
6.831 m
May 6, 2018
Lowest on record
0.619 m
Oct 17, 1968
Today
0.792 m
Oct 23, 2026
Years of data
62
since 1965

In short

Across 54 complete years, 1985 had the lowest average level (1.386 m) and 2008 the highest (2.100 m).

On average the lake is lowest in September (1.156 m) and highest in May (3.115 m).

Grand Lake level, all years

Loading chart…

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

Each year's lowest and highest level

024571965197319811989199720052013202120261965: lowest 0.78 m (1965-08-11), highest 2.41 m (1965-05-04), average 1.31 m, 270 days measured1966: lowest 0.78 m (1966-08-13), highest 3.07 m (1966-04-27), average 1.47 m, 358 days measured1967: lowest 0.81 m (1967-02-23), highest 4.11 m (1967-05-14), average 1.52 m, 331 days measured1968: lowest 0.62 m (1968-10-17), highest 4.25 m (1968-04-22), average 1.43 m, 366 days measured1969: lowest 0.84 m (1969-09-08), highest 4.46 m (1969-05-14), average 1.66 m, 304 days measured1970: lowest 0.97 m (1970-03-21), highest 4.27 m (1970-05-06), average 1.70 m, 365 days measured1971: lowest 0.88 m (1971-08-03), highest 4.57 m (1971-05-08), average 1.52 m, 355 days measured1972: lowest 0.74 m (1972-02-13), highest 5.22 m (1972-05-20), average 1.82 m, 351 days measured1973: lowest 0.79 m (1973-10-09), highest 6.44 m (1973-05-02), average 1.97 m, 353 days measured1974: lowest 0.85 m (1974-09-03), highest 5.02 m (1974-05-05), average 1.75 m, 365 days measured1975: lowest 0.68 m (1975-09-02), highest 4.33 m (1975-05-14), average 1.56 m, 365 days measured1976: lowest 1.06 m (1976-01-14), highest 4.78 m (1976-04-08), average 2.06 m, 366 days measured1977: lowest 0.82 m (1977-09-12), highest 4.86 m (1977-04-29), average 1.90 m, 359 days measured1978: lowest 0.76 m (1978-10-03), highest 4.51 m (1978-05-13), average 1.52 m, 319 days measured1979: lowest 0.97 m (1979-01-01), highest 5.66 m (1979-05-03), average 2.01 m, 365 days measured1980: lowest 0.79 m (1980-03-14), highest 3.53 m (1980-04-19), average 1.59 m, 366 days measured1981: lowest 0.99 m (1981-02-02), highest 4.33 m (1981-04-12), average 2.01 m, 365 days measured1982: lowest 0.91 m (1982-07-17), highest 4.95 m (1982-05-01), average 1.70 m, 345 days measured1983: lowest 0.88 m (1983-09-19), highest 5.11 m (1983-04-29), average 1.84 m, 365 days measured1984: lowest 0.82 m (1984-10-19), highest 5.18 m (1984-05-03), average 1.88 m, 366 days measured1985: lowest 0.71 m (1985-11-05), highest 3.08 m (1985-05-08), average 1.39 m, 365 days measured1986: lowest 0.97 m (1986-01-21), highest 3.86 m (1986-04-28), average 1.64 m, 365 days measured1987: lowest 0.80 m (1987-03-14), highest 5.03 m (1987-04-08), average 1.42 m, 365 days measured1988: lowest 0.89 m (1988-10-05), highest 3.24 m (1988-04-19), average 1.52 m, 326 days measured1989: lowest 0.79 m (1989-03-05), highest 3.95 m (1989-05-10), average 1.46 m, 365 days measured1990: lowest 0.97 m (1990-01-01), highest 3.90 m (1990-05-01), average 1.86 m, 365 days measured1991: lowest 0.80 m (1991-08-05), highest 4.88 m (1991-04-29), average 1.77 m, 348 days measured1992: lowest 0.81 m (1992-10-08), highest 3.51 m (1992-05-06), average 1.62 m, 362 days measured1993: lowest 0.88 m (1993-03-05), highest 4.48 m (1993-04-26), average 1.75 m, 361 days measured1994: lowest 0.75 m (1994-09-05), highest 5.18 m (1994-04-20), average 1.80 m, 323 days measured1995: lowest 0.74 m (1995-09-22), highest 3.79 m (1995-04-25), average 1.64 m, 335 days measured1996: lowest 0.95 m (1996-09-12), highest 4.56 m (1996-04-30), average 1.93 m, 366 days measured1997: lowest 0.77 m (1997-08-15), highest 4.90 m (1997-05-06), average 1.64 m, 346 days measured1998: lowest 0.96 m (1998-08-08), highest 4.61 m (1998-04-23), average 1.75 m, 365 days measured1999: lowest 0.92 m (1999-07-27), highest 3.41 m (1999-04-25), average 1.75 m, 365 days measured2000: lowest 0.83 m (2000-09-11), highest 4.65 m (2000-04-13), average 1.71 m, 327 days measured2001: lowest 0.82 m (2001-10-13), highest 4.68 m (2001-04-29), average 1.41 m, 365 days measured2002: lowest 0.69 m (2002-09-03), highest 4.18 m (2002-04-22), average 1.54 m, 365 days measured2003: lowest 0.79 m (2003-09-23), highest 4.46 m (2003-04-30), average 1.80 m, 365 days measured2004: lowest 0.79 m (2004-10-12), highest 3.56 m (2004-04-23), average 1.57 m, 365 days measured2005: lowest 0.90 m (2005-08-31), highest 5.79 m (2005-05-03), average 2.05 m, 364 days measured2006: lowest 0.82 m (2006-10-02), highest 3.46 m (2006-04-22), average 1.89 m, 365 days measured2007: lowest 0.76 m (2007-09-24), highest 4.01 m (2007-05-02), average 1.61 m, 349 days measured2008: lowest 1.10 m (2008-09-27), highest 6.22 m (2008-05-03), average 2.10 m, 366 days measured2009: lowest 0.97 m (2009-09-27), highest 4.91 m (2009-04-28), average 1.92 m, 352 days measured2010: lowest 0.94 m (2010-08-25), highest 4.33 m (2010-04-12), average 1.90 m, 364 days measured2011: lowest 1.09 m (2011-02-16), highest 4.91 m (2011-05-08), average 2.08 m, 316 days measured2012: lowest 0.96 m (2012-09-14), highest 3.86 m (2012-03-27), average 1.72 m, 366 days measured2013: lowest 1.10 m (2013-01-29), highest 3.76 m (2013-04-28), average 1.90 m, 365 days measured2014: lowest 0.91 m (2014-10-02), highest 5.26 m (2014-04-26), average 2.03 m, 365 days measured2015: lowest 0.99 m (2015-03-15), highest 4.79 m (2015-04-26), average 1.77 m, 365 days measured2016: lowest 0.91 m (2016-10-11), highest 3.95 m (2016-04-14), average 1.78 m, 366 days measured2017: lowest 0.85 m (2017-09-03), highest 5.37 m (2017-05-08), average 1.87 m, 365 days measured2018: lowest 0.94 m (2018-09-25), highest 6.83 m (2018-05-06), average 1.89 m, 365 days measured2019: lowest 0.96 m (2019-08-27), highest 6.62 m (2019-04-25), average 2.02 m, 365 days measured2020: lowest 0.79 m (2020-09-15), highest 4.34 m (2020-04-17), average 1.71 m, 366 days measured2021: lowest 0.98 m (2021-09-02), highest 4.18 m (2021-04-04), average 1.67 m, 365 days measured2022: lowest 0.99 m (2022-09-21), highest 4.49 m (2022-04-21), average 1.91 m, 365 days measured2023: lowest 1.29 m (2023-06-03), highest 4.83 m (2023-04-22), average 2.02 m, 365 days measured2024: lowest 0.91 m (2024-11-10), highest 3.74 m (2024-04-17), average 1.63 m, 366 days measured2025: lowest 0.80 m (2025-10-04), highest 3.95 m (2025-05-02), average 1.65 m, 365 days measured2026: lowest 0.82 m (2026-09-26), highest 1.43 m (2026-01-02), average 1.14 m, 79 days measured
02457196519811997201320261965: lowest 0.78 m (1965-08-11), highest 2.41 m (1965-05-04), average 1.31 m, 270 days measured1966: lowest 0.78 m (1966-08-13), highest 3.07 m (1966-04-27), average 1.47 m, 358 days measured1967: lowest 0.81 m (1967-02-23), highest 4.11 m (1967-05-14), average 1.52 m, 331 days measured1968: lowest 0.62 m (1968-10-17), highest 4.25 m (1968-04-22), average 1.43 m, 366 days measured1969: lowest 0.84 m (1969-09-08), highest 4.46 m (1969-05-14), average 1.66 m, 304 days measured1970: lowest 0.97 m (1970-03-21), highest 4.27 m (1970-05-06), average 1.70 m, 365 days measured1971: lowest 0.88 m (1971-08-03), highest 4.57 m (1971-05-08), average 1.52 m, 355 days measured1972: lowest 0.74 m (1972-02-13), highest 5.22 m (1972-05-20), average 1.82 m, 351 days measured1973: lowest 0.79 m (1973-10-09), highest 6.44 m (1973-05-02), average 1.97 m, 353 days measured1974: lowest 0.85 m (1974-09-03), highest 5.02 m (1974-05-05), average 1.75 m, 365 days measured1975: lowest 0.68 m (1975-09-02), highest 4.33 m (1975-05-14), average 1.56 m, 365 days measured1976: lowest 1.06 m (1976-01-14), highest 4.78 m (1976-04-08), average 2.06 m, 366 days measured1977: lowest 0.82 m (1977-09-12), highest 4.86 m (1977-04-29), average 1.90 m, 359 days measured1978: lowest 0.76 m (1978-10-03), highest 4.51 m (1978-05-13), average 1.52 m, 319 days measured1979: lowest 0.97 m (1979-01-01), highest 5.66 m (1979-05-03), average 2.01 m, 365 days measured1980: lowest 0.79 m (1980-03-14), highest 3.53 m (1980-04-19), average 1.59 m, 366 days measured1981: lowest 0.99 m (1981-02-02), highest 4.33 m (1981-04-12), average 2.01 m, 365 days measured1982: lowest 0.91 m (1982-07-17), highest 4.95 m (1982-05-01), average 1.70 m, 345 days measured1983: lowest 0.88 m (1983-09-19), highest 5.11 m (1983-04-29), average 1.84 m, 365 days measured1984: lowest 0.82 m (1984-10-19), highest 5.18 m (1984-05-03), average 1.88 m, 366 days measured1985: lowest 0.71 m (1985-11-05), highest 3.08 m (1985-05-08), average 1.39 m, 365 days measured1986: lowest 0.97 m (1986-01-21), highest 3.86 m (1986-04-28), average 1.64 m, 365 days measured1987: lowest 0.80 m (1987-03-14), highest 5.03 m (1987-04-08), average 1.42 m, 365 days measured1988: lowest 0.89 m (1988-10-05), highest 3.24 m (1988-04-19), average 1.52 m, 326 days measured1989: lowest 0.79 m (1989-03-05), highest 3.95 m (1989-05-10), average 1.46 m, 365 days measured1990: lowest 0.97 m (1990-01-01), highest 3.90 m (1990-05-01), average 1.86 m, 365 days measured1991: lowest 0.80 m (1991-08-05), highest 4.88 m (1991-04-29), average 1.77 m, 348 days measured1992: lowest 0.81 m (1992-10-08), highest 3.51 m (1992-05-06), average 1.62 m, 362 days measured1993: lowest 0.88 m (1993-03-05), highest 4.48 m (1993-04-26), average 1.75 m, 361 days measured1994: lowest 0.75 m (1994-09-05), highest 5.18 m (1994-04-20), average 1.80 m, 323 days measured1995: lowest 0.74 m (1995-09-22), highest 3.79 m (1995-04-25), average 1.64 m, 335 days measured1996: lowest 0.95 m (1996-09-12), highest 4.56 m (1996-04-30), average 1.93 m, 366 days measured1997: lowest 0.77 m (1997-08-15), highest 4.90 m (1997-05-06), average 1.64 m, 346 days measured1998: lowest 0.96 m (1998-08-08), highest 4.61 m (1998-04-23), average 1.75 m, 365 days measured1999: lowest 0.92 m (1999-07-27), highest 3.41 m (1999-04-25), average 1.75 m, 365 days measured2000: lowest 0.83 m (2000-09-11), highest 4.65 m (2000-04-13), average 1.71 m, 327 days measured2001: lowest 0.82 m (2001-10-13), highest 4.68 m (2001-04-29), average 1.41 m, 365 days measured2002: lowest 0.69 m (2002-09-03), highest 4.18 m (2002-04-22), average 1.54 m, 365 days measured2003: lowest 0.79 m (2003-09-23), highest 4.46 m (2003-04-30), average 1.80 m, 365 days measured2004: lowest 0.79 m (2004-10-12), highest 3.56 m (2004-04-23), average 1.57 m, 365 days measured2005: lowest 0.90 m (2005-08-31), highest 5.79 m (2005-05-03), average 2.05 m, 364 days measured2006: lowest 0.82 m (2006-10-02), highest 3.46 m (2006-04-22), average 1.89 m, 365 days measured2007: lowest 0.76 m (2007-09-24), highest 4.01 m (2007-05-02), average 1.61 m, 349 days measured2008: lowest 1.10 m (2008-09-27), highest 6.22 m (2008-05-03), average 2.10 m, 366 days measured2009: lowest 0.97 m (2009-09-27), highest 4.91 m (2009-04-28), average 1.92 m, 352 days measured2010: lowest 0.94 m (2010-08-25), highest 4.33 m (2010-04-12), average 1.90 m, 364 days measured2011: lowest 1.09 m (2011-02-16), highest 4.91 m (2011-05-08), average 2.08 m, 316 days measured2012: lowest 0.96 m (2012-09-14), highest 3.86 m (2012-03-27), average 1.72 m, 366 days measured2013: lowest 1.10 m (2013-01-29), highest 3.76 m (2013-04-28), average 1.90 m, 365 days measured2014: lowest 0.91 m (2014-10-02), highest 5.26 m (2014-04-26), average 2.03 m, 365 days measured2015: lowest 0.99 m (2015-03-15), highest 4.79 m (2015-04-26), average 1.77 m, 365 days measured2016: lowest 0.91 m (2016-10-11), highest 3.95 m (2016-04-14), average 1.78 m, 366 days measured2017: lowest 0.85 m (2017-09-03), highest 5.37 m (2017-05-08), average 1.87 m, 365 days measured2018: lowest 0.94 m (2018-09-25), highest 6.83 m (2018-05-06), average 1.89 m, 365 days measured2019: lowest 0.96 m (2019-08-27), highest 6.62 m (2019-04-25), average 2.02 m, 365 days measured2020: lowest 0.79 m (2020-09-15), highest 4.34 m (2020-04-17), average 1.71 m, 366 days measured2021: lowest 0.98 m (2021-09-02), highest 4.18 m (2021-04-04), average 1.67 m, 365 days measured2022: lowest 0.99 m (2022-09-21), highest 4.49 m (2022-04-21), average 1.91 m, 365 days measured2023: lowest 1.29 m (2023-06-03), highest 4.83 m (2023-04-22), average 2.02 m, 365 days measured2024: lowest 0.91 m (2024-11-10), highest 3.74 m (2024-04-17), average 1.63 m, 366 days measured2025: lowest 0.80 m (2025-10-04), highest 3.95 m (2025-05-02), average 1.65 m, 365 days measured2026: lowest 0.82 m (2026-09-26), highest 1.43 m (2026-01-02), average 1.14 m, 79 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.

  • 19680.619 m on Oct 17
  • 19750.680 m on Sep 2
  • 20020.692 m on Sep 3
  • 19850.715 m on Nov 5
  • 19950.736 m on Sep 22

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (79 days)1.1380.822Sep 261.425Jan 2
20251.6510.802Oct 43.948May 2
20241.6280.907Nov 103.740Apr 17
20232.0181.291Jun 34.831Apr 22
20221.9140.986Sep 214.488Apr 21
20211.6720.977Sep 24.179Apr 4
20201.7060.794Sep 154.336Apr 17
20192.0190.961Aug 276.620Apr 25
20181.8920.940Sep 256.831May 6
20171.8680.853Sep 35.370May 8
20161.7750.908Oct 113.952Apr 14
20151.7660.993Mar 154.788Apr 26
20142.0290.913Oct 25.264Apr 26
20131.9041.102Jan 293.756Apr 28
20121.7220.959Sep 143.861Mar 27
2011 (316 days)2.0751.088Feb 164.908May 8
20101.9040.944Aug 254.327Apr 12
20091.9240.973Sep 274.912Apr 28
20082.1001.103Sep 276.224May 3
20071.6120.759Sep 244.010May 2
20061.8890.821Oct 23.457Apr 22
20052.0510.900Aug 315.794May 3
20041.5750.785Oct 123.564Apr 23
20031.7980.789Sep 234.460Apr 30
20021.5440.692Sep 34.180Apr 22
20011.4070.823Oct 134.679Apr 29
2000 (327 days)1.7080.828Sep 114.646Apr 13
19991.7500.919Jul 273.413Apr 25
19981.7470.956Aug 84.607Apr 23
19971.6360.767Aug 154.896May 6
19961.9260.954Sep 124.558Apr 30
19951.6370.736Sep 223.787Apr 25
1994 (323 days)1.7980.755Sep 55.184Apr 20
19931.7470.876Mar 54.477Apr 26
19921.6190.806Oct 83.508May 6
19911.7740.804Aug 54.880Apr 29
19901.8580.973Jan 13.896May 1
19891.4580.794Mar 53.952May 10
1988 (326 days)1.5250.888Oct 53.243Apr 19
19871.4230.797Mar 145.033Apr 8
19861.6360.975Jan 213.865Apr 28
19851.3860.715Nov 53.084May 8
19841.8830.823Oct 195.181May 3
19831.8450.879Sep 195.114Apr 29
19821.7000.907Jul 174.946May 1
19812.0150.995Feb 24.330Apr 12
19801.5910.786Mar 143.527Apr 19
19792.0090.969Jan 15.659May 3
1978 (319 days)1.5230.762Oct 34.511May 13
19771.9040.823Sep 124.855Apr 29
19762.0571.061Jan 144.782Apr 8
19751.5550.680Sep 24.334May 14
19741.7530.847Sep 35.020May 5
19731.9670.789Oct 96.440May 2
19721.8250.744Feb 135.215May 20
19711.5160.881Aug 34.575May 8
19701.7010.972Mar 214.267May 6
1969 (304 days)1.6620.841Sep 84.459May 14
19681.4300.619Oct 174.252Apr 22
19671.5230.811Feb 234.109May 14
19661.4740.780Aug 133.072Apr 27
1965 (270 days)1.3110.780Aug 112.414May 4

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

Monthly averages

MonthAverageLowestHighest
January1.4630.8673.016
February1.3640.7442.893
March1.5620.7864.704
April2.9771.0306.620
May3.1151.1776.831
June1.7660.8913.937
July1.4010.8412.722
August1.2550.6952.759
September1.1560.6222.737
October1.3810.6193.292
November1.7040.7153.500
December1.7330.8724.263

Download

Daily levels as CSV (21,777 rows; credit the original agencies listed below)