Country: Canada
United StatesCanadaUnited Kingdom

Marsh Lake water level history

Daily records since 1950 · Level today: 2.702 m

Highest on record
4.201 m
Jul 11, 2021
Lowest on record
0.116 m
May 18, 1966
Today
2.702 m
Oct 23, 2026
Years of data
76
since 1950

In short

Across 54 complete years, 1968 had the lowest average level (1.354 m) and 1981 the highest (2.457 m).

On average the lake is lowest in May (0.726 m) and highest in August (2.881 m).

Marsh Lake level, all years

Loading chart…

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

Each year's lowest and highest level

-012341950196019701980199020002010202020261950: lowest 0.96 m (1950-06-06), highest 2.38 m (1950-08-22), average 1.91 m, 141 days measured1951: lowest 1.18 m (1951-06-06), highest 2.29 m (1951-09-09), average 1.80 m, 157 days measured1952: lowest 1.65 m (1952-01-02), highest 2.57 m (1952-09-29), average 2.22 m, 84 days measured1953: lowest 1.39 m (1953-12-02), highest 3.31 m (1953-08-11), average 2.28 m, 230 days measured1954: lowest 1.51 m (1954-04-19), highest 2.71 m (1954-08-14), average 1.95 m, 296 days measured1955: lowest 1.15 m (1955-05-18), highest 2.75 m (1955-08-04), average 1.98 m, 151 days measured1956: lowest 1.04 m (1956-05-29), highest 2.35 m (1956-08-30), average 1.81 m, 164 days measured1957: lowest 1.43 m (1957-05-15), highest 2.91 m (1957-08-14), average 2.07 m, 179 days measured1958: lowest 1.21 m (1958-05-01), highest 2.51 m (1958-08-18), average 1.84 m, 122 days measured1959: lowest 1.10 m (1959-05-14), highest 3.02 m (1959-08-14), average 1.96 m, 116 days measured1960: lowest 1.17 m (1960-05-03), highest 2.98 m (1960-08-18), average 2.00 m, 105 days measured1961: lowest 1.06 m (1961-03-06), highest 3.51 m (1961-08-25), average 2.24 m, 106 days measured1962: lowest 1.00 m (1962-05-09), highest 3.06 m (1962-08-31), average 1.88 m, 151 days measured1963: lowest 0.50 m (1963-04-30), highest 3.28 m (1963-09-18), average 1.91 m, 117 days measured1964: lowest 0.43 m (1964-05-29), highest 3.34 m (1964-08-12), average 1.87 m, 97 days measured1965: lowest 0.23 m (1965-05-19), highest 2.41 m (1965-08-27), average 1.52 m, 72 days measured1966: lowest 0.12 m (1966-05-18), highest 2.61 m (1966-08-30), average 1.77 m, 195 days measured1967: lowest 0.32 m (1967-05-02), highest 3.04 m (1967-09-23), average 1.43 m, 365 days measured1968: lowest 0.20 m (1968-05-08), highest 2.72 m (1968-09-11), average 1.35 m, 355 days measured1969: lowest 0.61 m (1969-02-06), highest 2.84 m (1969-08-10), average 1.66 m, 338 days measured1970: lowest 0.60 m (1970-05-12), highest 2.47 m (1970-10-14), average 1.73 m, 324 days measured1971: lowest 0.37 m (1971-05-23), highest 3.54 m (1971-08-23), average 1.84 m, 324 days measured1972: lowest 0.50 m (1972-05-07), highest 3.06 m (1972-08-30), average 1.89 m, 358 days measured1973: lowest 0.53 m (1973-05-14), highest 2.54 m (1973-08-27), average 1.72 m, 355 days measured1974: lowest 0.39 m (1974-05-21), highest 2.76 m (1974-09-25), average 1.55 m, 297 days measured1975: lowest 0.95 m (1975-05-26), highest 3.20 m (1975-07-25), average 2.59 m, 229 days measured1976: lowest 0.98 m (1976-05-17), highest 3.02 m (1976-09-29), average 2.33 m, 366 days measured1977: lowest 0.91 m (1977-05-23), highest 3.39 m (1977-08-27), average 2.34 m, 365 days measured1978: lowest 0.86 m (1978-05-18), highest 2.94 m (1978-10-12), average 2.05 m, 365 days measured1979: lowest 0.76 m (1979-05-24), highest 3.32 m (1979-08-30), average 2.19 m, 365 days measured1980: lowest 0.80 m (1980-05-21), highest 2.98 m (1980-08-18), average 2.24 m, 366 days measured1981: lowest 1.12 m (1981-05-15), highest 3.64 m (1981-09-16), average 2.46 m, 365 days measured1982: lowest 0.58 m (1982-05-29), highest 2.82 m (1982-08-31), average 2.10 m, 365 days measured1983: lowest 0.71 m (1983-05-29), highest 2.86 m (1983-10-11), average 1.99 m, 365 days measured1984: lowest 0.67 m (1984-05-20), highest 2.74 m (1984-10-23), average 1.84 m, 366 days measured1985: lowest 0.46 m (1985-05-25), highest 2.75 m (1985-09-30), average 1.91 m, 365 days measured1986: lowest 0.70 m (1986-05-29), highest 3.20 m (1986-08-13), average 2.11 m, 365 days measured1987: lowest 0.57 m (1987-05-26), highest 2.92 m (1987-10-10), average 2.06 m, 365 days measured1988: lowest 0.62 m (1988-05-12), highest 3.08 m (1988-08-12), average 2.11 m, 366 days measured1989: lowest 0.74 m (1989-05-04), highest 3.35 m (1989-08-24), average 2.21 m, 365 days measured1990: lowest 0.52 m (1990-05-08), highest 3.25 m (1990-08-28), average 2.11 m, 365 days measured1991: lowest 0.66 m (1991-05-16), highest 2.89 m (1991-09-23), average 2.07 m, 365 days measured1992: lowest 0.78 m (1992-05-23), highest 3.45 m (1992-07-29), average 2.22 m, 366 days measured1993: lowest 0.60 m (1993-05-14), highest 3.25 m (1993-08-12), average 2.23 m, 350 days measured1994: lowest 0.65 m (1994-05-11), highest 3.24 m (1994-08-22), average 2.13 m, 349 days measured1995: lowest 0.59 m (1995-05-05), highest 2.86 m (1995-09-22), average 2.01 m, 365 days measured1996: lowest 0.48 m (1996-05-19), highest 2.80 m (1996-10-08), average 1.81 m, 366 days measured1997: lowest 0.46 m (1997-05-13), highest 2.95 m (1997-09-01), average 1.93 m, 365 days measured1998: lowest 0.36 m (1998-05-22), highest 2.97 m (1998-10-26), average 1.97 m, 365 days measured1999: lowest 0.34 m (1999-05-23), highest 2.89 m (1999-11-01), average 1.88 m, 365 days measured2000: lowest 0.54 m (2000-05-25), highest 3.21 m (2000-08-19), average 2.12 m, 366 days measured2001: lowest 0.48 m (2001-05-27), highest 2.99 m (2001-08-18), average 2.15 m, 365 days measured2002: lowest 0.60 m (2002-05-19), highest 2.86 m (2002-10-28), average 2.06 m, 365 days measured2003: lowest 0.60 m (2003-05-24), highest 2.87 m (2003-10-06), average 2.00 m, 365 days measured2004: lowest 0.60 m (2004-05-12), highest 3.43 m (2004-08-24), average 2.15 m, 366 days measured2005: lowest 0.65 m (2005-05-06), highest 2.99 m (2005-08-24), average 2.12 m, 365 days measured2006: lowest 0.57 m (2006-05-19), highest 3.02 m (2006-08-03), average 2.15 m, 365 days measured2007: lowest 0.57 m (2007-05-16), highest 3.98 m (2007-08-14), average 2.33 m, 365 days measured2008: lowest 0.44 m (2008-05-18), highest 2.90 m (2008-10-06), average 1.90 m, 366 days measured2009: lowest 0.52 m (2009-04-30), highest 3.28 m (2009-09-02), average 1.99 m, 365 days measured2010: lowest 0.49 m (2010-05-18), highest 2.85 m (2010-10-19), average 1.94 m, 365 days measured2011: lowest 0.44 m (2011-05-18), highest 2.88 m (2011-09-14), average 1.88 m, 365 days measured2012: lowest 0.47 m (2012-05-21), highest 3.24 m (2012-08-10), average 1.99 m, 366 days measured2013: lowest 0.53 m (2013-05-03), highest 3.38 m (2013-08-20), average 2.13 m, 365 days measured2014: lowest 0.72 m (2014-05-04), highest 3.07 m (2014-08-26), average 2.08 m, 365 days measured2015: lowest 0.65 m (2015-05-13), highest 3.16 m (2015-08-31), average 2.15 m, 365 days measured2016: lowest 0.80 m (2016-05-13), highest 3.33 m (2016-09-21), average 2.06 m, 366 days measured2017: lowest 0.48 m (2017-05-17), highest 2.91 m (2017-08-14), average 1.88 m, 365 days measured2018: lowest 0.56 m (2018-05-09), highest 3.01 m (2018-09-01), average 1.88 m, 365 days measured2019: lowest 0.51 m (2019-05-17), highest 2.86 m (2019-08-22), average 1.87 m, 365 days measured2020: lowest 0.63 m (2020-05-11), highest 2.98 m (2020-09-01), average 1.96 m, 366 days measured2021: lowest 0.62 m (2021-05-07), highest 4.20 m (2021-07-11), average 2.46 m, 365 days measured2022: lowest 0.39 m (2022-05-07), highest 3.62 m (2022-08-27), average 2.23 m, 365 days measured2023: lowest 0.56 m (2023-05-12), highest 3.07 m (2023-09-01), average 2.15 m, 365 days measured2024: lowest 0.66 m (2024-05-09), highest 3.51 m (2024-08-01), average 2.17 m, 366 days measured2026: lowest 2.64 m (2026-10-08), highest 2.79 m (2026-09-22), average 2.72 m, 30 days measured
-01234195019691988200720261950: lowest 0.96 m (1950-06-06), highest 2.38 m (1950-08-22), average 1.91 m, 141 days measured1951: lowest 1.18 m (1951-06-06), highest 2.29 m (1951-09-09), average 1.80 m, 157 days measured1952: lowest 1.65 m (1952-01-02), highest 2.57 m (1952-09-29), average 2.22 m, 84 days measured1953: lowest 1.39 m (1953-12-02), highest 3.31 m (1953-08-11), average 2.28 m, 230 days measured1954: lowest 1.51 m (1954-04-19), highest 2.71 m (1954-08-14), average 1.95 m, 296 days measured1955: lowest 1.15 m (1955-05-18), highest 2.75 m (1955-08-04), average 1.98 m, 151 days measured1956: lowest 1.04 m (1956-05-29), highest 2.35 m (1956-08-30), average 1.81 m, 164 days measured1957: lowest 1.43 m (1957-05-15), highest 2.91 m (1957-08-14), average 2.07 m, 179 days measured1958: lowest 1.21 m (1958-05-01), highest 2.51 m (1958-08-18), average 1.84 m, 122 days measured1959: lowest 1.10 m (1959-05-14), highest 3.02 m (1959-08-14), average 1.96 m, 116 days measured1960: lowest 1.17 m (1960-05-03), highest 2.98 m (1960-08-18), average 2.00 m, 105 days measured1961: lowest 1.06 m (1961-03-06), highest 3.51 m (1961-08-25), average 2.24 m, 106 days measured1962: lowest 1.00 m (1962-05-09), highest 3.06 m (1962-08-31), average 1.88 m, 151 days measured1963: lowest 0.50 m (1963-04-30), highest 3.28 m (1963-09-18), average 1.91 m, 117 days measured1964: lowest 0.43 m (1964-05-29), highest 3.34 m (1964-08-12), average 1.87 m, 97 days measured1965: lowest 0.23 m (1965-05-19), highest 2.41 m (1965-08-27), average 1.52 m, 72 days measured1966: lowest 0.12 m (1966-05-18), highest 2.61 m (1966-08-30), average 1.77 m, 195 days measured1967: lowest 0.32 m (1967-05-02), highest 3.04 m (1967-09-23), average 1.43 m, 365 days measured1968: lowest 0.20 m (1968-05-08), highest 2.72 m (1968-09-11), average 1.35 m, 355 days measured1969: lowest 0.61 m (1969-02-06), highest 2.84 m (1969-08-10), average 1.66 m, 338 days measured1970: lowest 0.60 m (1970-05-12), highest 2.47 m (1970-10-14), average 1.73 m, 324 days measured1971: lowest 0.37 m (1971-05-23), highest 3.54 m (1971-08-23), average 1.84 m, 324 days measured1972: lowest 0.50 m (1972-05-07), highest 3.06 m (1972-08-30), average 1.89 m, 358 days measured1973: lowest 0.53 m (1973-05-14), highest 2.54 m (1973-08-27), average 1.72 m, 355 days measured1974: lowest 0.39 m (1974-05-21), highest 2.76 m (1974-09-25), average 1.55 m, 297 days measured1975: lowest 0.95 m (1975-05-26), highest 3.20 m (1975-07-25), average 2.59 m, 229 days measured1976: lowest 0.98 m (1976-05-17), highest 3.02 m (1976-09-29), average 2.33 m, 366 days measured1977: lowest 0.91 m (1977-05-23), highest 3.39 m (1977-08-27), average 2.34 m, 365 days measured1978: lowest 0.86 m (1978-05-18), highest 2.94 m (1978-10-12), average 2.05 m, 365 days measured1979: lowest 0.76 m (1979-05-24), highest 3.32 m (1979-08-30), average 2.19 m, 365 days measured1980: lowest 0.80 m (1980-05-21), highest 2.98 m (1980-08-18), average 2.24 m, 366 days measured1981: lowest 1.12 m (1981-05-15), highest 3.64 m (1981-09-16), average 2.46 m, 365 days measured1982: lowest 0.58 m (1982-05-29), highest 2.82 m (1982-08-31), average 2.10 m, 365 days measured1983: lowest 0.71 m (1983-05-29), highest 2.86 m (1983-10-11), average 1.99 m, 365 days measured1984: lowest 0.67 m (1984-05-20), highest 2.74 m (1984-10-23), average 1.84 m, 366 days measured1985: lowest 0.46 m (1985-05-25), highest 2.75 m (1985-09-30), average 1.91 m, 365 days measured1986: lowest 0.70 m (1986-05-29), highest 3.20 m (1986-08-13), average 2.11 m, 365 days measured1987: lowest 0.57 m (1987-05-26), highest 2.92 m (1987-10-10), average 2.06 m, 365 days measured1988: lowest 0.62 m (1988-05-12), highest 3.08 m (1988-08-12), average 2.11 m, 366 days measured1989: lowest 0.74 m (1989-05-04), highest 3.35 m (1989-08-24), average 2.21 m, 365 days measured1990: lowest 0.52 m (1990-05-08), highest 3.25 m (1990-08-28), average 2.11 m, 365 days measured1991: lowest 0.66 m (1991-05-16), highest 2.89 m (1991-09-23), average 2.07 m, 365 days measured1992: lowest 0.78 m (1992-05-23), highest 3.45 m (1992-07-29), average 2.22 m, 366 days measured1993: lowest 0.60 m (1993-05-14), highest 3.25 m (1993-08-12), average 2.23 m, 350 days measured1994: lowest 0.65 m (1994-05-11), highest 3.24 m (1994-08-22), average 2.13 m, 349 days measured1995: lowest 0.59 m (1995-05-05), highest 2.86 m (1995-09-22), average 2.01 m, 365 days measured1996: lowest 0.48 m (1996-05-19), highest 2.80 m (1996-10-08), average 1.81 m, 366 days measured1997: lowest 0.46 m (1997-05-13), highest 2.95 m (1997-09-01), average 1.93 m, 365 days measured1998: lowest 0.36 m (1998-05-22), highest 2.97 m (1998-10-26), average 1.97 m, 365 days measured1999: lowest 0.34 m (1999-05-23), highest 2.89 m (1999-11-01), average 1.88 m, 365 days measured2000: lowest 0.54 m (2000-05-25), highest 3.21 m (2000-08-19), average 2.12 m, 366 days measured2001: lowest 0.48 m (2001-05-27), highest 2.99 m (2001-08-18), average 2.15 m, 365 days measured2002: lowest 0.60 m (2002-05-19), highest 2.86 m (2002-10-28), average 2.06 m, 365 days measured2003: lowest 0.60 m (2003-05-24), highest 2.87 m (2003-10-06), average 2.00 m, 365 days measured2004: lowest 0.60 m (2004-05-12), highest 3.43 m (2004-08-24), average 2.15 m, 366 days measured2005: lowest 0.65 m (2005-05-06), highest 2.99 m (2005-08-24), average 2.12 m, 365 days measured2006: lowest 0.57 m (2006-05-19), highest 3.02 m (2006-08-03), average 2.15 m, 365 days measured2007: lowest 0.57 m (2007-05-16), highest 3.98 m (2007-08-14), average 2.33 m, 365 days measured2008: lowest 0.44 m (2008-05-18), highest 2.90 m (2008-10-06), average 1.90 m, 366 days measured2009: lowest 0.52 m (2009-04-30), highest 3.28 m (2009-09-02), average 1.99 m, 365 days measured2010: lowest 0.49 m (2010-05-18), highest 2.85 m (2010-10-19), average 1.94 m, 365 days measured2011: lowest 0.44 m (2011-05-18), highest 2.88 m (2011-09-14), average 1.88 m, 365 days measured2012: lowest 0.47 m (2012-05-21), highest 3.24 m (2012-08-10), average 1.99 m, 366 days measured2013: lowest 0.53 m (2013-05-03), highest 3.38 m (2013-08-20), average 2.13 m, 365 days measured2014: lowest 0.72 m (2014-05-04), highest 3.07 m (2014-08-26), average 2.08 m, 365 days measured2015: lowest 0.65 m (2015-05-13), highest 3.16 m (2015-08-31), average 2.15 m, 365 days measured2016: lowest 0.80 m (2016-05-13), highest 3.33 m (2016-09-21), average 2.06 m, 366 days measured2017: lowest 0.48 m (2017-05-17), highest 2.91 m (2017-08-14), average 1.88 m, 365 days measured2018: lowest 0.56 m (2018-05-09), highest 3.01 m (2018-09-01), average 1.88 m, 365 days measured2019: lowest 0.51 m (2019-05-17), highest 2.86 m (2019-08-22), average 1.87 m, 365 days measured2020: lowest 0.63 m (2020-05-11), highest 2.98 m (2020-09-01), average 1.96 m, 366 days measured2021: lowest 0.62 m (2021-05-07), highest 4.20 m (2021-07-11), average 2.46 m, 365 days measured2022: lowest 0.39 m (2022-05-07), highest 3.62 m (2022-08-27), average 2.23 m, 365 days measured2023: lowest 0.56 m (2023-05-12), highest 3.07 m (2023-09-01), average 2.15 m, 365 days measured2024: lowest 0.66 m (2024-05-09), highest 3.51 m (2024-08-01), average 2.17 m, 366 days measured2026: lowest 2.64 m (2026-10-08), highest 2.79 m (2026-09-22), average 2.72 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.

  • 19680.195 m on May 8
  • 19670.323 m on May 2
  • 19990.343 m on May 23
  • 19980.365 m on May 22
  • 20220.392 m on May 7

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)2.7192.644Oct 82.794Sep 22
20242.1700.661May 93.512Aug 1
20232.1510.558May 123.071Sep 1
20222.2340.392May 73.619Aug 27
20212.4560.624May 74.201Jul 11
20201.9620.627May 112.982Sep 1
20191.8700.507May 172.863Aug 22
20181.8800.564May 93.008Sep 1
20171.8850.476May 172.914Aug 14
20162.0600.796May 133.327Sep 21
20152.1490.647May 133.160Aug 31
20142.0830.724May 43.070Aug 26
20132.1270.532May 33.378Aug 20
20121.9890.473May 213.239Aug 10
20111.8820.444May 182.877Sep 14
20101.9370.490May 182.851Oct 19
20091.9890.521Apr 303.275Sep 2
20081.8970.437May 182.905Oct 6
20072.3260.569May 163.981Aug 14
20062.1500.569May 193.017Aug 3
20052.1220.647May 62.986Aug 24
20042.1450.604May 123.430Aug 24
20031.9980.604May 242.867Oct 6
20022.0650.598May 192.859Oct 28
20012.1510.484May 272.995Aug 18
20002.1220.538May 253.206Aug 19
19991.8840.343May 232.889Nov 1
19981.9670.365May 222.974Oct 26
19971.9280.461May 132.953Sep 1
19961.8140.476May 192.801Oct 8
19952.0060.594May 52.856Sep 22
19942.1310.652May 113.238Aug 22
19932.2280.598May 143.251Aug 12
19922.2220.784May 233.445Jul 29
19912.0680.664May 162.891Sep 23
19902.1090.517May 83.246Aug 28
19892.2120.744May 43.347Aug 24
19882.1130.621May 123.075Aug 12
19872.0560.566May 262.922Oct 10
19862.1130.703May 293.196Aug 13
19851.9070.464May 252.755Sep 30
19841.8400.668May 202.737Oct 23
19831.9930.710May 292.865Oct 11
19822.1050.576May 292.820Aug 31
19812.4571.119May 153.635Sep 16
19802.2420.802May 212.980Aug 18
19792.1900.762May 243.319Aug 30
19782.0500.863May 182.935Oct 12
19772.3360.914May 233.389Aug 27
19762.3260.978May 173.018Sep 29
1975 (229 days)2.5930.945May 263.200Jul 25
1974 (297 days)1.5540.387May 212.758Sep 25
19731.7230.527May 142.545Aug 27
19721.8920.500May 73.063Aug 30
1971 (324 days)1.8410.375May 233.539Aug 23
1970 (324 days)1.7320.597May 122.469Oct 14
19691.6640.607Feb 62.835Aug 10
19681.3540.195May 82.722Sep 11
19671.4260.323May 23.036Sep 23
1966 (195 days)1.7720.116May 182.612Aug 30
1965 (72 days)1.5160.226May 192.408Aug 27
1964 (97 days)1.8670.427May 293.338Aug 12
1963 (117 days)1.9090.497Apr 303.280Sep 18
1962 (151 days)1.8771.000May 93.057Aug 31
1961 (106 days)2.2441.061Mar 63.511Aug 25
1960 (105 days)2.0001.167May 32.984Aug 18
1959 (116 days)1.9611.097May 143.021Aug 14
1958 (122 days)1.8371.213May 12.509Aug 18
1957 (179 days)2.0711.433May 152.908Aug 14
1956 (164 days)1.8071.042May 292.353Aug 30
1955 (151 days)1.9841.152May 182.755Aug 4
1954 (296 days)1.9451.512Apr 192.713Aug 14
1953 (230 days)2.2771.387Dec 23.307Aug 11
1952 (84 days)2.2231.652Jan 22.566Sep 29
1951 (157 days)1.8001.183Jun 62.286Sep 9
1950 (141 days)1.9060.957Jun 62.377Aug 22

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

Monthly averages

MonthAverageLowestHighest
January2.0550.6162.734
February1.7140.4512.524
March1.3440.3472.271
April0.9340.1251.859
May0.7260.1161.768
June1.5160.1893.667
July2.5031.1524.201
August2.8811.8654.053
September2.8271.7623.832
October2.6371.3263.613
November2.5141.1983.388
December2.3280.7832.881

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Daily levels as CSV (23,325 rows; credit the original agencies listed below)