Country: Canada
United StatesCanadaUnited Kingdom

Larsen Reservoir water level history

Daily records since 1960 · Level today: 631.050 m

Highest on record
631.884 m
Jul 8, 1978
Lowest on record
626.346 m
Oct 20, 1988
Today
631.050 m
Oct 23, 2026
Years of data
67
since 1960

In short

Across 6 complete years, 2021 had the lowest average level (630.328 m) and 2020 the highest (630.825 m).

On average the lake is lowest in November (630.134 m) and highest in May (630.801 m).

Larsen Reservoir level, all years

Loading chart…

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

Each year's lowest and highest level

6266286296316321960196819761984199220002008201620261960: lowest 628.39 m (1960-03-17), highest 631.33 m (1960-03-28), average 630.49 m, 30 days measured1961: lowest 629.14 m (1961-10-31), highest 629.85 m (1961-06-06), average 629.62 m, 30 days measured1962: lowest 628.42 m (1962-01-04), highest 630.85 m (1962-04-08), average 630.54 m, 50 days measured1963: lowest 630.00 m (1963-01-08), highest 631.61 m (1963-06-09), average 631.02 m, 40 days measured1964: lowest 630.52 m (1964-03-10), highest 631.42 m (1964-04-05), average 631.04 m, 33 days measured1965: lowest 629.88 m (1965-03-30), highest 631.62 m (1965-04-02), average 631.28 m, 32 days measured1966: lowest 630.21 m (1966-11-02), highest 631.34 m (1966-03-16), average 630.77 m, 26 days measured1967: lowest 629.84 m (1967-11-09), highest 631.48 m (1967-04-05), average 630.80 m, 82 days measured1968: lowest 629.80 m (1968-01-04), highest 631.27 m (1968-08-25), average 630.50 m, 80 days measured1969: lowest 630.81 m (1969-10-28), highest 631.73 m (1969-04-10), average 631.10 m, 65 days measured1970: lowest 630.69 m (1970-10-26), highest 631.80 m (1970-05-03), average 631.04 m, 214 days measured1971: lowest 630.36 m (1971-10-15), highest 631.64 m (1971-07-11), average 630.96 m, 208 days measured1972: lowest 630.33 m (1972-02-29), highest 631.39 m (1972-03-16), average 630.96 m, 237 days measured1973: lowest 629.40 m (1973-12-14), highest 630.50 m (1973-06-05), average 630.20 m, 282 days measured1974: lowest 629.42 m (1974-02-05), highest 631.45 m (1974-04-16), average 630.54 m, 228 days measured1975: lowest 630.17 m (1975-03-08), highest 631.48 m (1975-04-20), average 630.83 m, 255 days measured1976: lowest 630.26 m (1976-12-31), highest 631.49 m (1976-06-12), average 630.92 m, 240 days measured1977: lowest 630.06 m (1977-12-31), highest 630.55 m (1977-05-25), average 630.29 m, 253 days measured1978: lowest 630.06 m (1978-01-03), highest 631.88 m (1978-07-08), average 630.77 m, 254 days measured1979: lowest 629.84 m (1979-12-31), highest 631.51 m (1979-04-19), average 630.83 m, 255 days measured1980: lowest 628.67 m (1980-12-04), highest 630.22 m (1980-04-16), average 629.67 m, 287 days measured1981: lowest 626.59 m (1981-12-30), highest 628.85 m (1981-03-31), average 628.42 m, 282 days measured1982: lowest 626.50 m (1982-03-31), highest 631.50 m (1982-04-19), average 630.72 m, 226 days measured1983: lowest 630.16 m (1983-12-31), highest 631.42 m (1983-04-11), average 630.86 m, 253 days measured1984: lowest 627.68 m (1984-12-31), highest 630.26 m (1984-03-31), average 629.64 m, 257 days measured1985: lowest 627.61 m (1985-02-04), highest 630.79 m (1985-04-29), average 630.22 m, 256 days measured1986: lowest 629.62 m (1986-01-03), highest 631.15 m (1986-05-11), average 630.85 m, 263 days measured1987: lowest 629.85 m (1987-12-29), highest 631.24 m (1987-04-01), average 630.71 m, 253 days measured1988: lowest 626.35 m (1988-10-20), highest 630.01 m (1988-06-20), average 629.09 m, 255 days measured1989: lowest 626.37 m (1989-01-01), highest 630.99 m (1989-04-23), average 629.89 m, 280 days measured1990: lowest 629.59 m (1990-01-01), highest 631.32 m (1990-07-03), average 630.72 m, 254 days measured1991: lowest 630.68 m (1991-12-31), highest 631.21 m (1991-07-05), average 630.83 m, 277 days measured1992: lowest 630.10 m (1992-12-31), highest 630.73 m (1992-04-28), average 630.53 m, 279 days measured1993: lowest 629.95 m (1993-06-28), highest 631.49 m (1993-07-22), average 630.49 m, 278 days measured1994: lowest 630.55 m (1994-12-31), highest 631.42 m (1994-03-19), average 630.88 m, 257 days measured1995: lowest 630.55 m (1995-01-01), highest 631.13 m (1995-07-08), average 630.97 m, 256 days measured1996: lowest 630.65 m (1996-12-31), highest 631.29 m (1996-04-09), average 630.94 m, 252 days measured1997: lowest 630.45 m (1997-10-21), highest 631.50 m (1997-04-01), average 630.82 m, 247 days measured1998: lowest 630.41 m (1998-02-25), highest 630.97 m (1998-07-10), average 630.72 m, 251 days measured1999: lowest 630.60 m (1999-03-01), highest 631.67 m (1999-03-27), average 630.98 m, 247 days measured2000: lowest 630.66 m (2000-05-02), highest 631.19 m (2000-07-06), average 630.85 m, 21 days measured2001: lowest 630.40 m (2001-11-07), highest 631.19 m (2001-03-31), average 630.83 m, 19 days measured2002: lowest 630.07 m (2002-11-04), highest 630.44 m (2002-04-30), average 630.28 m, 17 days measured2003: lowest 630.03 m (2003-02-28), highest 631.15 m (2003-03-31), average 630.76 m, 17 days measured2004: lowest 630.44 m (2004-03-01), highest 631.20 m (2004-05-31), average 630.85 m, 18 days measured2005: lowest 630.66 m (2005-10-30), highest 631.23 m (2005-03-30), average 630.92 m, 17 days measured2006: lowest 630.11 m (2006-11-01), highest 630.69 m (2006-05-04), average 630.45 m, 19 days measured2007: lowest 630.06 m (2007-02-28), highest 631.10 m (2007-06-30), average 630.66 m, 19 days measured2008: lowest 630.32 m (2008-11-03), highest 630.66 m (2008-03-31), average 630.53 m, 17 days measured2009: lowest 630.34 m (2009-01-13), highest 631.13 m (2009-04-30), average 630.78 m, 19 days measured2010: lowest 630.68 m (2010-03-01), highest 631.21 m (2010-03-30), average 631.04 m, 18 days measured2011: lowest 630.48 m (2011-09-30), highest 631.60 m (2011-04-04), average 631.00 m, 16 days measured2012: lowest 630.39 m (2012-10-31), highest 630.94 m (2012-05-31), average 630.68 m, 14 days measured2013: lowest 630.41 m (2013-03-01), highest 631.78 m (2013-05-31), average 630.89 m, 245 days measured2014: lowest 630.73 m (2014-03-05), highest 631.27 m (2014-06-02), average 631.05 m, 245 days measured2015: lowest 630.43 m (2015-10-29), highest 631.40 m (2015-03-12), average 630.83 m, 245 days measured2016: lowest 630.07 m (2016-09-21), highest 630.45 m (2016-03-12), average 630.27 m, 245 days measured2017: lowest 630.24 m (2017-10-31), highest 631.27 m (2017-03-20), average 630.74 m, 254 days measured2018: lowest 629.73 m (2018-11-07), highest 630.32 m (2018-04-30), average 630.04 m, 266 days measured2019: lowest 629.74 m (2019-02-28), highest 631.22 m (2019-10-02), average 630.76 m, 206 days measured2020: lowest 630.42 m (2020-12-19), highest 631.17 m (2020-03-10), average 630.82 m, 366 days measured2021: lowest 630.09 m (2021-12-18), highest 630.63 m (2021-05-30), average 630.33 m, 365 days measured2022: lowest 630.07 m (2022-03-14), highest 631.36 m (2022-05-14), average 630.76 m, 365 days measured2023: lowest 630.48 m (2023-11-01), highest 631.40 m (2023-04-12), average 630.75 m, 365 days measured2024: lowest 630.03 m (2024-11-11), highest 630.68 m (2024-03-24), average 630.37 m, 366 days measured2025: lowest 630.06 m (2025-02-21), highest 631.40 m (2025-03-26), average 630.70 m, 365 days measured2026: lowest 631.05 m (2026-10-21), highest 631.12 m (2026-09-22), average 631.08 m, 30 days measured
626628629631632196019771994201120261960: lowest 628.39 m (1960-03-17), highest 631.33 m (1960-03-28), average 630.49 m, 30 days measured1961: lowest 629.14 m (1961-10-31), highest 629.85 m (1961-06-06), average 629.62 m, 30 days measured1962: lowest 628.42 m (1962-01-04), highest 630.85 m (1962-04-08), average 630.54 m, 50 days measured1963: lowest 630.00 m (1963-01-08), highest 631.61 m (1963-06-09), average 631.02 m, 40 days measured1964: lowest 630.52 m (1964-03-10), highest 631.42 m (1964-04-05), average 631.04 m, 33 days measured1965: lowest 629.88 m (1965-03-30), highest 631.62 m (1965-04-02), average 631.28 m, 32 days measured1966: lowest 630.21 m (1966-11-02), highest 631.34 m (1966-03-16), average 630.77 m, 26 days measured1967: lowest 629.84 m (1967-11-09), highest 631.48 m (1967-04-05), average 630.80 m, 82 days measured1968: lowest 629.80 m (1968-01-04), highest 631.27 m (1968-08-25), average 630.50 m, 80 days measured1969: lowest 630.81 m (1969-10-28), highest 631.73 m (1969-04-10), average 631.10 m, 65 days measured1970: lowest 630.69 m (1970-10-26), highest 631.80 m (1970-05-03), average 631.04 m, 214 days measured1971: lowest 630.36 m (1971-10-15), highest 631.64 m (1971-07-11), average 630.96 m, 208 days measured1972: lowest 630.33 m (1972-02-29), highest 631.39 m (1972-03-16), average 630.96 m, 237 days measured1973: lowest 629.40 m (1973-12-14), highest 630.50 m (1973-06-05), average 630.20 m, 282 days measured1974: lowest 629.42 m (1974-02-05), highest 631.45 m (1974-04-16), average 630.54 m, 228 days measured1975: lowest 630.17 m (1975-03-08), highest 631.48 m (1975-04-20), average 630.83 m, 255 days measured1976: lowest 630.26 m (1976-12-31), highest 631.49 m (1976-06-12), average 630.92 m, 240 days measured1977: lowest 630.06 m (1977-12-31), highest 630.55 m (1977-05-25), average 630.29 m, 253 days measured1978: lowest 630.06 m (1978-01-03), highest 631.88 m (1978-07-08), average 630.77 m, 254 days measured1979: lowest 629.84 m (1979-12-31), highest 631.51 m (1979-04-19), average 630.83 m, 255 days measured1980: lowest 628.67 m (1980-12-04), highest 630.22 m (1980-04-16), average 629.67 m, 287 days measured1981: lowest 626.59 m (1981-12-30), highest 628.85 m (1981-03-31), average 628.42 m, 282 days measured1982: lowest 626.50 m (1982-03-31), highest 631.50 m (1982-04-19), average 630.72 m, 226 days measured1983: lowest 630.16 m (1983-12-31), highest 631.42 m (1983-04-11), average 630.86 m, 253 days measured1984: lowest 627.68 m (1984-12-31), highest 630.26 m (1984-03-31), average 629.64 m, 257 days measured1985: lowest 627.61 m (1985-02-04), highest 630.79 m (1985-04-29), average 630.22 m, 256 days measured1986: lowest 629.62 m (1986-01-03), highest 631.15 m (1986-05-11), average 630.85 m, 263 days measured1987: lowest 629.85 m (1987-12-29), highest 631.24 m (1987-04-01), average 630.71 m, 253 days measured1988: lowest 626.35 m (1988-10-20), highest 630.01 m (1988-06-20), average 629.09 m, 255 days measured1989: lowest 626.37 m (1989-01-01), highest 630.99 m (1989-04-23), average 629.89 m, 280 days measured1990: lowest 629.59 m (1990-01-01), highest 631.32 m (1990-07-03), average 630.72 m, 254 days measured1991: lowest 630.68 m (1991-12-31), highest 631.21 m (1991-07-05), average 630.83 m, 277 days measured1992: lowest 630.10 m (1992-12-31), highest 630.73 m (1992-04-28), average 630.53 m, 279 days measured1993: lowest 629.95 m (1993-06-28), highest 631.49 m (1993-07-22), average 630.49 m, 278 days measured1994: lowest 630.55 m (1994-12-31), highest 631.42 m (1994-03-19), average 630.88 m, 257 days measured1995: lowest 630.55 m (1995-01-01), highest 631.13 m (1995-07-08), average 630.97 m, 256 days measured1996: lowest 630.65 m (1996-12-31), highest 631.29 m (1996-04-09), average 630.94 m, 252 days measured1997: lowest 630.45 m (1997-10-21), highest 631.50 m (1997-04-01), average 630.82 m, 247 days measured1998: lowest 630.41 m (1998-02-25), highest 630.97 m (1998-07-10), average 630.72 m, 251 days measured1999: lowest 630.60 m (1999-03-01), highest 631.67 m (1999-03-27), average 630.98 m, 247 days measured2000: lowest 630.66 m (2000-05-02), highest 631.19 m (2000-07-06), average 630.85 m, 21 days measured2001: lowest 630.40 m (2001-11-07), highest 631.19 m (2001-03-31), average 630.83 m, 19 days measured2002: lowest 630.07 m (2002-11-04), highest 630.44 m (2002-04-30), average 630.28 m, 17 days measured2003: lowest 630.03 m (2003-02-28), highest 631.15 m (2003-03-31), average 630.76 m, 17 days measured2004: lowest 630.44 m (2004-03-01), highest 631.20 m (2004-05-31), average 630.85 m, 18 days measured2005: lowest 630.66 m (2005-10-30), highest 631.23 m (2005-03-30), average 630.92 m, 17 days measured2006: lowest 630.11 m (2006-11-01), highest 630.69 m (2006-05-04), average 630.45 m, 19 days measured2007: lowest 630.06 m (2007-02-28), highest 631.10 m (2007-06-30), average 630.66 m, 19 days measured2008: lowest 630.32 m (2008-11-03), highest 630.66 m (2008-03-31), average 630.53 m, 17 days measured2009: lowest 630.34 m (2009-01-13), highest 631.13 m (2009-04-30), average 630.78 m, 19 days measured2010: lowest 630.68 m (2010-03-01), highest 631.21 m (2010-03-30), average 631.04 m, 18 days measured2011: lowest 630.48 m (2011-09-30), highest 631.60 m (2011-04-04), average 631.00 m, 16 days measured2012: lowest 630.39 m (2012-10-31), highest 630.94 m (2012-05-31), average 630.68 m, 14 days measured2013: lowest 630.41 m (2013-03-01), highest 631.78 m (2013-05-31), average 630.89 m, 245 days measured2014: lowest 630.73 m (2014-03-05), highest 631.27 m (2014-06-02), average 631.05 m, 245 days measured2015: lowest 630.43 m (2015-10-29), highest 631.40 m (2015-03-12), average 630.83 m, 245 days measured2016: lowest 630.07 m (2016-09-21), highest 630.45 m (2016-03-12), average 630.27 m, 245 days measured2017: lowest 630.24 m (2017-10-31), highest 631.27 m (2017-03-20), average 630.74 m, 254 days measured2018: lowest 629.73 m (2018-11-07), highest 630.32 m (2018-04-30), average 630.04 m, 266 days measured2019: lowest 629.74 m (2019-02-28), highest 631.22 m (2019-10-02), average 630.76 m, 206 days measured2020: lowest 630.42 m (2020-12-19), highest 631.17 m (2020-03-10), average 630.82 m, 366 days measured2021: lowest 630.09 m (2021-12-18), highest 630.63 m (2021-05-30), average 630.33 m, 365 days measured2022: lowest 630.07 m (2022-03-14), highest 631.36 m (2022-05-14), average 630.76 m, 365 days measured2023: lowest 630.48 m (2023-11-01), highest 631.40 m (2023-04-12), average 630.75 m, 365 days measured2024: lowest 630.03 m (2024-11-11), highest 630.68 m (2024-03-24), average 630.37 m, 366 days measured2025: lowest 630.06 m (2025-02-21), highest 631.40 m (2025-03-26), average 630.70 m, 365 days measured2026: lowest 631.05 m (2026-10-21), highest 631.12 m (2026-09-22), average 631.08 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.

  • 2024630.026 m on Nov 11
  • 2025630.061 m on Feb 21
  • 2022630.071 m on Mar 14
  • 2021630.093 m on Dec 18
  • 2020630.416 m on Dec 19

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)631.078631.049Oct 21631.117Sep 22
2025630.704630.061Feb 21631.402Mar 26
2024630.370630.026Nov 11630.680Mar 24
2023630.750630.484Nov 1631.395Apr 12
2022630.760630.071Mar 14631.355May 14
2021630.328630.093Dec 18630.628May 30
2020630.825630.416Dec 19631.169Mar 10
2019 (206 days)630.762629.738Feb 28631.223Oct 2
2018 (266 days)630.045629.729Nov 7630.321Apr 30
2017 (254 days)630.744630.236Oct 31631.267Mar 20
2016 (245 days)630.265630.073Sep 21630.446Mar 12
2015 (245 days)630.825630.429Oct 29631.402Mar 12
2014 (245 days)631.052630.728Mar 5631.268Jun 2
2013 (245 days)630.893630.410Mar 1631.784May 31
2012 (14 days)630.681630.391Oct 31630.935May 31
2011 (16 days)630.999630.479Sep 30631.595Apr 4
2010 (18 days)631.038630.680Mar 1631.208Mar 30
2009 (19 days)630.778630.336Jan 13631.126Apr 30
2008 (17 days)630.528630.323Nov 3630.661Mar 31
2007 (19 days)630.657630.055Feb 28631.103Jun 30
2006 (19 days)630.452630.108Nov 1630.687May 4
2005 (17 days)630.924630.660Oct 30631.234Mar 30
2004 (18 days)630.855630.440Mar 1631.200May 31
2003 (17 days)630.761630.030Feb 28631.150Mar 31
2002 (17 days)630.281630.066Nov 4630.440Apr 30
2001 (19 days)630.834630.403Nov 7631.190Mar 31
2000 (21 days)630.848630.664May 2631.190Jul 6
1999 (247 days)630.978630.600Mar 1631.673Mar 27
1998 (251 days)630.716630.414Feb 25630.974Jul 10
1997 (247 days)630.817630.447Oct 21631.502Apr 1
1996 (252 days)630.941630.650Dec 31631.287Apr 9
1995 (256 days)630.971630.550Jan 1631.133Jul 8
1994 (257 days)630.881630.550Dec 31631.423Mar 19
1993 (278 days)630.487629.954Jun 28631.492Jul 22
1992 (279 days)630.528630.100Dec 31630.734Apr 28
1991 (277 days)630.833630.675Dec 31631.210Jul 5
1990 (254 days)630.718629.590Jan 1631.320Jul 3
1989 (280 days)629.889626.370Jan 1630.987Apr 23
1988 (255 days)629.085626.346Oct 20630.012Jun 20
1987 (253 days)630.712629.850Dec 29631.239Apr 1
1986 (263 days)630.854629.621Jan 3631.154May 11
1985 (256 days)630.217627.608Feb 4630.787Apr 29
1984 (257 days)629.640627.682Dec 31630.260Mar 31
1983 (253 days)630.858630.160Dec 31631.420Apr 11
1982 (226 days)630.723626.500Mar 31631.500Apr 19
1981 (282 days)628.425626.594Dec 30628.850Mar 31
1980 (287 days)629.672628.671Dec 4630.218Apr 16
1979 (255 days)630.833629.844Dec 31631.510Apr 19
1978 (254 days)630.769630.055Jan 3631.884Jul 8
1977 (253 days)630.292630.055Dec 31630.552May 25
1976 (240 days)630.919630.256Dec 31631.491Jun 12
1975 (255 days)630.833630.168Mar 8631.482Apr 20
1974 (228 days)630.537629.415Feb 5631.451Apr 16
1973 (282 days)630.200629.400Dec 14630.497Jun 5
1972 (237 days)630.960630.329Feb 29631.390Mar 16
1971 (208 days)630.964630.360Oct 15631.643Jul 11
1970 (214 days)631.043630.689Oct 26631.799May 3
1969 (65 days)631.103630.814Oct 28631.728Apr 10
1968 (80 days)630.502629.802Jan 4631.274Aug 25
1967 (82 days)630.798629.842Nov 9631.482Apr 5
1966 (26 days)630.774630.214Nov 2631.338Mar 16
1965 (32 days)631.284629.884Mar 30631.622Apr 2
1964 (33 days)631.038630.515Mar 10631.421Apr 5
1963 (40 days)631.022630.000Jan 8631.607Jun 9
1962 (50 days)630.538628.421Jan 4630.845Apr 8
1961 (30 days)629.619629.141Oct 31629.854Jun 6
1960 (30 days)630.488628.394Mar 17631.326Mar 28

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

Monthly averages

MonthAverageLowestHighest
January630.322626.370631.204
February630.228626.370631.110
March630.381626.370631.673
April630.745626.500631.735
May630.801628.613631.799
June630.742628.538631.607
July630.696628.327631.884
August630.554628.171631.512
September630.444628.032631.396
October630.338626.346631.518
November630.134626.346631.241
December630.184626.370630.956

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Daily levels as CSV (12,263 rows; credit the original agencies listed below)