Country: Canada
United StatesCanadaUnited Kingdom

Lac Saint-Louis water level history

Daily records since 1915 · Level today: 20.949 m

Highest on record
22.850 m
May 14, 1943
Lowest on record
19.970 m
Nov 11, 1934
Today
20.949 m
Oct 23, 2026
Years of data
111
since 1915

In short

Across 106 complete years, 1935 had the lowest average level (20.495 m) and 2019 the highest (21.857 m).

On average the lake is lowest in October (20.980 m) and highest in April (21.623 m).

Lac Saint-Louis level, all years

Loading chart…

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

Each year's lowest and highest level

19.820.621.422.223.01915192919431957197119851999201320261915: lowest 20.46 m (1915-12-13), highest 21.01 m (1915-05-23), average 20.68 m, 217 days measured1916: lowest 20.63 m (1916-03-27), highest 22.44 m (1916-05-21), average 21.22 m, 365 days measured1917: lowest 20.58 m (1917-03-12), highest 21.86 m (1917-04-04), average 21.24 m, 349 days measured1918: lowest 20.77 m (1918-03-11), highest 22.09 m (1918-04-04), average 21.20 m, 365 days measured1919: lowest 20.95 m (1919-02-12), highest 22.47 m (1919-05-27), average 21.36 m, 353 days measured1920: lowest 20.47 m (1920-11-23), highest 21.60 m (1920-03-28), average 20.91 m, 365 days measured1921: lowest 20.47 m (1921-11-03), highest 21.73 m (1921-05-09), average 20.95 m, 365 days measured1922: lowest 20.47 m (1922-02-25), highest 22.28 m (1922-04-21), average 21.01 m, 363 days measured1923: lowest 20.25 m (1923-03-04), highest 21.83 m (1923-05-23), average 20.80 m, 365 days measured1924: lowest 20.54 m (1924-01-01), highest 22.01 m (1924-05-19), average 21.00 m, 363 days measured1925: lowest 20.38 m (1925-10-25), highest 21.74 m (1925-03-31), average 20.86 m, 365 days measured1926: lowest 20.40 m (1926-03-21), highest 21.90 m (1926-04-27), average 20.90 m, 365 days measured1927: lowest 20.56 m (1927-09-28), highest 21.69 m (1927-03-20), average 21.03 m, 365 days measured1928: lowest 20.91 m (1928-09-09), highest 22.48 m (1928-04-10), average 21.37 m, 366 days measured1929: lowest 20.91 m (1929-10-31), highest 22.51 m (1929-05-09), average 21.43 m, 365 days measured1930: lowest 20.58 m (1930-12-25), highest 21.88 m (1930-04-09), average 21.26 m, 365 days measured1931: lowest 20.32 m (1931-10-15), highest 21.14 m (1931-01-19), average 20.63 m, 365 days measured1932: lowest 20.39 m (1932-01-02), highest 21.99 m (1932-04-13), average 20.94 m, 366 days measured1933: lowest 20.13 m (1933-11-07), highest 21.84 m (1933-04-19), average 20.70 m, 365 days measured1934: lowest 19.97 m (1934-11-11), highest 22.01 m (1934-04-14), average 20.53 m, 365 days measured1935: lowest 20.06 m (1935-11-03), highest 21.03 m (1935-05-03), average 20.49 m, 365 days measured1936: lowest 20.16 m (1936-02-28), highest 22.01 m (1936-05-20), average 20.71 m, 366 days measured1937: lowest 20.46 m (1937-10-17), highest 21.96 m (1937-04-08), average 20.93 m, 365 days measured1938: lowest 20.38 m (1938-12-04), highest 22.19 m (1938-03-26), average 20.92 m, 365 days measured1939: lowest 20.32 m (1939-11-26), highest 21.90 m (1939-04-24), average 20.87 m, 365 days measured1940: lowest 20.26 m (1940-03-03), highest 21.51 m (1940-06-04), average 20.80 m, 366 days measured1941: lowest 20.32 m (1941-09-01), highest 21.68 m (1941-04-29), average 20.73 m, 365 days measured1942: lowest 20.42 m (1942-10-18), highest 21.61 m (1942-04-20), average 20.87 m, 365 days measured1943: lowest 20.72 m (1943-01-22), highest 22.85 m (1943-05-14), average 21.36 m, 365 days measured1944: lowest 20.53 m (1944-11-21), highest 21.61 m (1944-01-01), average 20.98 m, 366 days measured1945: lowest 20.41 m (1945-01-18), highest 22.08 m (1945-04-05), average 21.23 m, 365 days measured1946: lowest 20.68 m (1946-10-10), highest 21.81 m (1946-03-16), average 21.12 m, 365 days measured1947: lowest 20.82 m (1947-12-02), highest 22.71 m (1947-06-04), average 21.50 m, 365 days measured1948: lowest 20.61 m (1948-02-01), highest 21.96 m (1948-03-23), average 21.11 m, 366 days measured1949: lowest 20.37 m (1949-12-01), highest 21.89 m (1949-03-29), average 20.95 m, 365 days measured1950: lowest 20.61 m (1950-01-03), highest 22.00 m (1950-04-06), average 21.10 m, 365 days measured1951: lowest 20.98 m (1951-10-03), highest 22.81 m (1951-04-17), average 21.46 m, 365 days measured1952: lowest 20.86 m (1952-11-19), highest 22.41 m (1952-04-07), average 21.46 m, 366 days measured1953: lowest 20.63 m (1953-11-09), highest 22.15 m (1953-03-31), average 21.20 m, 365 days measured1954: lowest 20.69 m (1954-01-01), highest 22.31 m (1954-04-18), average 21.29 m, 365 days measured1955: lowest 20.80 m (1955-10-06), highest 22.42 m (1955-04-23), average 21.29 m, 365 days measured1956: lowest 20.67 m (1956-12-31), highest 21.85 m (1956-05-01), average 21.19 m, 366 days measured1957: lowest 20.74 m (1957-10-05), highest 21.63 m (1957-01-10), average 21.05 m, 365 days measured1958: lowest 20.68 m (1958-11-12), highest 21.63 m (1958-04-05), average 20.96 m, 365 days measured1959: lowest 20.50 m (1959-10-19), highest 21.81 m (1959-04-10), average 20.96 m, 365 days measured1960: lowest 20.42 m (1960-10-18), highest 22.35 m (1960-05-18), average 21.23 m, 366 days measured1961: lowest 20.57 m (1961-03-19), highest 21.53 m (1961-05-29), average 21.05 m, 365 days measured1962: lowest 20.49 m (1962-05-28), highest 21.59 m (1962-04-10), average 20.87 m, 235 days measured1963: lowest 20.43 m (1963-10-14), highest 21.37 m (1963-12-27), average 20.64 m, 214 days measured1964: lowest 20.32 m (1964-04-05), highest 21.47 m (1964-01-15), average 20.58 m, 358 days measured1965: lowest 20.09 m (1965-03-28), highest 21.14 m (1965-12-15), average 20.66 m, 365 days measured1966: lowest 20.60 m (1966-10-09), highest 21.66 m (1966-01-14), average 20.98 m, 365 days measured1967: lowest 20.48 m (1967-03-26), highest 21.85 m (1967-11-15), average 21.19 m, 365 days measured1968: lowest 20.76 m (1968-12-25), highest 21.94 m (1968-04-02), average 21.25 m, 366 days measured1969: lowest 20.94 m (1969-12-25), highest 22.09 m (1969-04-24), average 21.44 m, 358 days measured1970: lowest 20.71 m (1970-03-22), highest 21.72 m (1970-05-06), average 21.30 m, 365 days measured1971: lowest 20.74 m (1971-12-05), highest 22.68 m (1971-04-22), average 21.31 m, 365 days measured1972: lowest 20.85 m (1972-02-14), highest 22.55 m (1972-05-07), average 21.66 m, 366 days measured1973: lowest 21.07 m (1973-12-27), highest 22.74 m (1973-03-19), average 21.84 m, 365 days measured1974: lowest 21.31 m (1974-11-20), highest 22.75 m (1974-05-23), average 21.83 m, 365 days measured1975: lowest 21.01 m (1975-01-25), highest 22.62 m (1975-04-21), average 21.52 m, 362 days measured1976: lowest 20.83 m (1976-12-06), highest 22.80 m (1976-04-01), average 21.76 m, 363 days measured1977: lowest 20.59 m (1977-02-27), highest 22.33 m (1977-03-16), average 21.40 m, 363 days measured1978: lowest 20.58 m (1978-12-19), highest 22.55 m (1978-04-15), average 21.49 m, 363 days measured1979: lowest 20.93 m (1979-01-28), highest 22.37 m (1979-05-02), average 21.61 m, 365 days measured1980: lowest 20.83 m (1980-12-29), highest 22.10 m (1980-04-16), average 21.50 m, 365 days measured1981: lowest 21.01 m (1981-01-01), highest 22.24 m (1981-02-26), average 21.52 m, 365 days measured1982: lowest 20.99 m (1982-01-12), highest 22.09 m (1982-04-29), average 21.41 m, 361 days measured1983: lowest 21.05 m (1983-01-25), highest 22.40 m (1983-05-12), average 21.49 m, 365 days measured1984: lowest 21.07 m (1984-01-06), highest 22.38 m (1984-04-07), average 21.59 m, 353 days measured1985: lowest 20.82 m (1985-12-25), highest 22.21 m (1985-05-06), average 21.60 m, 365 days measured1986: lowest 21.12 m (1986-01-13), highest 22.27 m (1986-05-27), average 21.81 m, 365 days measured1987: lowest 20.91 m (1987-01-24), highest 22.31 m (1987-03-27), average 21.49 m, 365 days measured1988: lowest 20.80 m (1988-07-11), highest 21.87 m (1988-05-01), average 21.21 m, 360 days measured1989: lowest 20.59 m (1989-03-15), highest 21.69 m (1989-12-19), average 21.17 m, 353 days measured1990: lowest 20.94 m (1990-09-25), highest 22.05 m (1990-03-18), average 21.36 m, 303 days measured1991: lowest 20.64 m (1991-11-17), highest 22.46 m (1991-04-23), average 21.28 m, 330 days measured1992: lowest 20.76 m (1992-02-23), highest 21.95 m (1992-11-28), average 21.35 m, 360 days measured1993: lowest 20.79 m (1993-12-30), highest 22.46 m (1993-04-23), average 21.61 m, 358 days measured1994: lowest 20.86 m (1994-01-02), highest 22.06 m (1994-04-17), average 21.40 m, 354 days measured1995: lowest 20.70 m (1995-07-15), highest 21.85 m (1995-03-18), average 21.13 m, 365 days measured1996: lowest 21.14 m (1996-01-19), highest 22.23 m (1996-05-13), average 21.57 m, 323 days measured1997: lowest 21.15 m (1997-12-11), highest 22.36 m (1997-05-20), average 21.68 m, 363 days measured1998: lowest 20.67 m (1998-11-19), highest 22.39 m (1998-03-30), average 21.46 m, 361 days measured1999: lowest 20.54 m (1999-10-02), highest 21.77 m (1999-04-09), average 20.89 m, 365 days measured2000: lowest 20.59 m (2000-11-07), highest 21.72 m (2000-05-13), average 21.09 m, 366 days measured2001: lowest 20.53 m (2001-06-21), highest 22.06 m (2001-04-13), average 20.84 m, 364 days measured2002: lowest 20.48 m (2002-12-22), highest 22.20 m (2002-06-18), average 21.11 m, 365 days measured2003: lowest 20.41 m (2003-02-02), highest 21.93 m (2003-12-01), average 21.00 m, 365 days measured2004: lowest 20.85 m (2004-11-24), highest 21.90 m (2004-01-29), average 21.32 m, 366 days measured2005: lowest 20.73 m (2005-08-27), highest 22.20 m (2005-04-04), average 21.23 m, 365 days measured2006: lowest 20.71 m (2006-06-26), highest 22.20 m (2006-12-03), average 21.31 m, 359 days measured2007: lowest 20.44 m (2007-12-23), highest 22.05 m (2007-04-18), average 21.09 m, 359 days measured2008: lowest 20.55 m (2008-01-01), highest 22.23 m (2008-04-21), average 21.38 m, 365 days measured2009: lowest 20.85 m (2009-12-26), highest 22.11 m (2009-04-08), average 21.41 m, 357 days measured2010: lowest 20.59 m (2010-05-20), highest 21.74 m (2010-10-02), average 21.00 m, 363 days measured2011: lowest 20.92 m (2011-10-11), highest 22.12 m (2011-05-05), average 21.37 m, 365 days measured2012: lowest 20.58 m (2012-11-26), highest 22.07 m (2012-03-18), average 20.97 m, 366 days measured2013: lowest 20.71 m (2013-01-13), highest 21.76 m (2013-04-26), average 21.15 m, 365 days measured2014: lowest 20.83 m (2014-04-03), highest 22.17 m (2014-04-12), average 21.38 m, 365 days measured2015: lowest 20.71 m (2015-04-01), highest 21.68 m (2015-02-03), average 21.22 m, 365 days measured2016: lowest 20.73 m (2016-10-19), highest 22.18 m (2016-03-18), average 21.27 m, 366 days measured2017: lowest 20.71 m (2017-01-04), highest 22.56 m (2017-05-18), average 21.74 m, 365 days measured2018: lowest 20.80 m (2018-10-07), highest 22.17 m (2018-05-01), average 21.64 m, 363 days measured2019: lowest 21.00 m (2019-01-17), highest 22.54 m (2019-05-28), average 21.86 m, 365 days measured2020: lowest 20.93 m (2020-10-11), highest 22.32 m (2020-04-16), average 21.75 m, 366 days measured2021: lowest 20.97 m (2021-06-22), highest 21.99 m (2021-03-29), average 21.38 m, 365 days measured2022: lowest 20.65 m (2022-11-10), highest 22.15 m (2022-05-02), average 21.47 m, 365 days measured2023: lowest 21.03 m (2023-02-27), highest 22.33 m (2023-05-11), average 21.50 m, 365 days measured2024: lowest 20.78 m (2024-12-06), highest 22.01 m (2024-08-11), average 21.30 m, 366 days measured2025: lowest 20.64 m (2025-09-21), highest 21.94 m (2025-05-11), average 21.10 m, 365 days measured2026: lowest 20.93 m (2026-10-12), highest 21.32 m (2026-09-24), average 21.10 m, 30 days measured
19.820.621.422.223.0191519431971199920261915: lowest 20.46 m (1915-12-13), highest 21.01 m (1915-05-23), average 20.68 m, 217 days measured1916: lowest 20.63 m (1916-03-27), highest 22.44 m (1916-05-21), average 21.22 m, 365 days measured1917: lowest 20.58 m (1917-03-12), highest 21.86 m (1917-04-04), average 21.24 m, 349 days measured1918: lowest 20.77 m (1918-03-11), highest 22.09 m (1918-04-04), average 21.20 m, 365 days measured1919: lowest 20.95 m (1919-02-12), highest 22.47 m (1919-05-27), average 21.36 m, 353 days measured1920: lowest 20.47 m (1920-11-23), highest 21.60 m (1920-03-28), average 20.91 m, 365 days measured1921: lowest 20.47 m (1921-11-03), highest 21.73 m (1921-05-09), average 20.95 m, 365 days measured1922: lowest 20.47 m (1922-02-25), highest 22.28 m (1922-04-21), average 21.01 m, 363 days measured1923: lowest 20.25 m (1923-03-04), highest 21.83 m (1923-05-23), average 20.80 m, 365 days measured1924: lowest 20.54 m (1924-01-01), highest 22.01 m (1924-05-19), average 21.00 m, 363 days measured1925: lowest 20.38 m (1925-10-25), highest 21.74 m (1925-03-31), average 20.86 m, 365 days measured1926: lowest 20.40 m (1926-03-21), highest 21.90 m (1926-04-27), average 20.90 m, 365 days measured1927: lowest 20.56 m (1927-09-28), highest 21.69 m (1927-03-20), average 21.03 m, 365 days measured1928: lowest 20.91 m (1928-09-09), highest 22.48 m (1928-04-10), average 21.37 m, 366 days measured1929: lowest 20.91 m (1929-10-31), highest 22.51 m (1929-05-09), average 21.43 m, 365 days measured1930: lowest 20.58 m (1930-12-25), highest 21.88 m (1930-04-09), average 21.26 m, 365 days measured1931: lowest 20.32 m (1931-10-15), highest 21.14 m (1931-01-19), average 20.63 m, 365 days measured1932: lowest 20.39 m (1932-01-02), highest 21.99 m (1932-04-13), average 20.94 m, 366 days measured1933: lowest 20.13 m (1933-11-07), highest 21.84 m (1933-04-19), average 20.70 m, 365 days measured1934: lowest 19.97 m (1934-11-11), highest 22.01 m (1934-04-14), average 20.53 m, 365 days measured1935: lowest 20.06 m (1935-11-03), highest 21.03 m (1935-05-03), average 20.49 m, 365 days measured1936: lowest 20.16 m (1936-02-28), highest 22.01 m (1936-05-20), average 20.71 m, 366 days measured1937: lowest 20.46 m (1937-10-17), highest 21.96 m (1937-04-08), average 20.93 m, 365 days measured1938: lowest 20.38 m (1938-12-04), highest 22.19 m (1938-03-26), average 20.92 m, 365 days measured1939: lowest 20.32 m (1939-11-26), highest 21.90 m (1939-04-24), average 20.87 m, 365 days measured1940: lowest 20.26 m (1940-03-03), highest 21.51 m (1940-06-04), average 20.80 m, 366 days measured1941: lowest 20.32 m (1941-09-01), highest 21.68 m (1941-04-29), average 20.73 m, 365 days measured1942: lowest 20.42 m (1942-10-18), highest 21.61 m (1942-04-20), average 20.87 m, 365 days measured1943: lowest 20.72 m (1943-01-22), highest 22.85 m (1943-05-14), average 21.36 m, 365 days measured1944: lowest 20.53 m (1944-11-21), highest 21.61 m (1944-01-01), average 20.98 m, 366 days measured1945: lowest 20.41 m (1945-01-18), highest 22.08 m (1945-04-05), average 21.23 m, 365 days measured1946: lowest 20.68 m (1946-10-10), highest 21.81 m (1946-03-16), average 21.12 m, 365 days measured1947: lowest 20.82 m (1947-12-02), highest 22.71 m (1947-06-04), average 21.50 m, 365 days measured1948: lowest 20.61 m (1948-02-01), highest 21.96 m (1948-03-23), average 21.11 m, 366 days measured1949: lowest 20.37 m (1949-12-01), highest 21.89 m (1949-03-29), average 20.95 m, 365 days measured1950: lowest 20.61 m (1950-01-03), highest 22.00 m (1950-04-06), average 21.10 m, 365 days measured1951: lowest 20.98 m (1951-10-03), highest 22.81 m (1951-04-17), average 21.46 m, 365 days measured1952: lowest 20.86 m (1952-11-19), highest 22.41 m (1952-04-07), average 21.46 m, 366 days measured1953: lowest 20.63 m (1953-11-09), highest 22.15 m (1953-03-31), average 21.20 m, 365 days measured1954: lowest 20.69 m (1954-01-01), highest 22.31 m (1954-04-18), average 21.29 m, 365 days measured1955: lowest 20.80 m (1955-10-06), highest 22.42 m (1955-04-23), average 21.29 m, 365 days measured1956: lowest 20.67 m (1956-12-31), highest 21.85 m (1956-05-01), average 21.19 m, 366 days measured1957: lowest 20.74 m (1957-10-05), highest 21.63 m (1957-01-10), average 21.05 m, 365 days measured1958: lowest 20.68 m (1958-11-12), highest 21.63 m (1958-04-05), average 20.96 m, 365 days measured1959: lowest 20.50 m (1959-10-19), highest 21.81 m (1959-04-10), average 20.96 m, 365 days measured1960: lowest 20.42 m (1960-10-18), highest 22.35 m (1960-05-18), average 21.23 m, 366 days measured1961: lowest 20.57 m (1961-03-19), highest 21.53 m (1961-05-29), average 21.05 m, 365 days measured1962: lowest 20.49 m (1962-05-28), highest 21.59 m (1962-04-10), average 20.87 m, 235 days measured1963: lowest 20.43 m (1963-10-14), highest 21.37 m (1963-12-27), average 20.64 m, 214 days measured1964: lowest 20.32 m (1964-04-05), highest 21.47 m (1964-01-15), average 20.58 m, 358 days measured1965: lowest 20.09 m (1965-03-28), highest 21.14 m (1965-12-15), average 20.66 m, 365 days measured1966: lowest 20.60 m (1966-10-09), highest 21.66 m (1966-01-14), average 20.98 m, 365 days measured1967: lowest 20.48 m (1967-03-26), highest 21.85 m (1967-11-15), average 21.19 m, 365 days measured1968: lowest 20.76 m (1968-12-25), highest 21.94 m (1968-04-02), average 21.25 m, 366 days measured1969: lowest 20.94 m (1969-12-25), highest 22.09 m (1969-04-24), average 21.44 m, 358 days measured1970: lowest 20.71 m (1970-03-22), highest 21.72 m (1970-05-06), average 21.30 m, 365 days measured1971: lowest 20.74 m (1971-12-05), highest 22.68 m (1971-04-22), average 21.31 m, 365 days measured1972: lowest 20.85 m (1972-02-14), highest 22.55 m (1972-05-07), average 21.66 m, 366 days measured1973: lowest 21.07 m (1973-12-27), highest 22.74 m (1973-03-19), average 21.84 m, 365 days measured1974: lowest 21.31 m (1974-11-20), highest 22.75 m (1974-05-23), average 21.83 m, 365 days measured1975: lowest 21.01 m (1975-01-25), highest 22.62 m (1975-04-21), average 21.52 m, 362 days measured1976: lowest 20.83 m (1976-12-06), highest 22.80 m (1976-04-01), average 21.76 m, 363 days measured1977: lowest 20.59 m (1977-02-27), highest 22.33 m (1977-03-16), average 21.40 m, 363 days measured1978: lowest 20.58 m (1978-12-19), highest 22.55 m (1978-04-15), average 21.49 m, 363 days measured1979: lowest 20.93 m (1979-01-28), highest 22.37 m (1979-05-02), average 21.61 m, 365 days measured1980: lowest 20.83 m (1980-12-29), highest 22.10 m (1980-04-16), average 21.50 m, 365 days measured1981: lowest 21.01 m (1981-01-01), highest 22.24 m (1981-02-26), average 21.52 m, 365 days measured1982: lowest 20.99 m (1982-01-12), highest 22.09 m (1982-04-29), average 21.41 m, 361 days measured1983: lowest 21.05 m (1983-01-25), highest 22.40 m (1983-05-12), average 21.49 m, 365 days measured1984: lowest 21.07 m (1984-01-06), highest 22.38 m (1984-04-07), average 21.59 m, 353 days measured1985: lowest 20.82 m (1985-12-25), highest 22.21 m (1985-05-06), average 21.60 m, 365 days measured1986: lowest 21.12 m (1986-01-13), highest 22.27 m (1986-05-27), average 21.81 m, 365 days measured1987: lowest 20.91 m (1987-01-24), highest 22.31 m (1987-03-27), average 21.49 m, 365 days measured1988: lowest 20.80 m (1988-07-11), highest 21.87 m (1988-05-01), average 21.21 m, 360 days measured1989: lowest 20.59 m (1989-03-15), highest 21.69 m (1989-12-19), average 21.17 m, 353 days measured1990: lowest 20.94 m (1990-09-25), highest 22.05 m (1990-03-18), average 21.36 m, 303 days measured1991: lowest 20.64 m (1991-11-17), highest 22.46 m (1991-04-23), average 21.28 m, 330 days measured1992: lowest 20.76 m (1992-02-23), highest 21.95 m (1992-11-28), average 21.35 m, 360 days measured1993: lowest 20.79 m (1993-12-30), highest 22.46 m (1993-04-23), average 21.61 m, 358 days measured1994: lowest 20.86 m (1994-01-02), highest 22.06 m (1994-04-17), average 21.40 m, 354 days measured1995: lowest 20.70 m (1995-07-15), highest 21.85 m (1995-03-18), average 21.13 m, 365 days measured1996: lowest 21.14 m (1996-01-19), highest 22.23 m (1996-05-13), average 21.57 m, 323 days measured1997: lowest 21.15 m (1997-12-11), highest 22.36 m (1997-05-20), average 21.68 m, 363 days measured1998: lowest 20.67 m (1998-11-19), highest 22.39 m (1998-03-30), average 21.46 m, 361 days measured1999: lowest 20.54 m (1999-10-02), highest 21.77 m (1999-04-09), average 20.89 m, 365 days measured2000: lowest 20.59 m (2000-11-07), highest 21.72 m (2000-05-13), average 21.09 m, 366 days measured2001: lowest 20.53 m (2001-06-21), highest 22.06 m (2001-04-13), average 20.84 m, 364 days measured2002: lowest 20.48 m (2002-12-22), highest 22.20 m (2002-06-18), average 21.11 m, 365 days measured2003: lowest 20.41 m (2003-02-02), highest 21.93 m (2003-12-01), average 21.00 m, 365 days measured2004: lowest 20.85 m (2004-11-24), highest 21.90 m (2004-01-29), average 21.32 m, 366 days measured2005: lowest 20.73 m (2005-08-27), highest 22.20 m (2005-04-04), average 21.23 m, 365 days measured2006: lowest 20.71 m (2006-06-26), highest 22.20 m (2006-12-03), average 21.31 m, 359 days measured2007: lowest 20.44 m (2007-12-23), highest 22.05 m (2007-04-18), average 21.09 m, 359 days measured2008: lowest 20.55 m (2008-01-01), highest 22.23 m (2008-04-21), average 21.38 m, 365 days measured2009: lowest 20.85 m (2009-12-26), highest 22.11 m (2009-04-08), average 21.41 m, 357 days measured2010: lowest 20.59 m (2010-05-20), highest 21.74 m (2010-10-02), average 21.00 m, 363 days measured2011: lowest 20.92 m (2011-10-11), highest 22.12 m (2011-05-05), average 21.37 m, 365 days measured2012: lowest 20.58 m (2012-11-26), highest 22.07 m (2012-03-18), average 20.97 m, 366 days measured2013: lowest 20.71 m (2013-01-13), highest 21.76 m (2013-04-26), average 21.15 m, 365 days measured2014: lowest 20.83 m (2014-04-03), highest 22.17 m (2014-04-12), average 21.38 m, 365 days measured2015: lowest 20.71 m (2015-04-01), highest 21.68 m (2015-02-03), average 21.22 m, 365 days measured2016: lowest 20.73 m (2016-10-19), highest 22.18 m (2016-03-18), average 21.27 m, 366 days measured2017: lowest 20.71 m (2017-01-04), highest 22.56 m (2017-05-18), average 21.74 m, 365 days measured2018: lowest 20.80 m (2018-10-07), highest 22.17 m (2018-05-01), average 21.64 m, 363 days measured2019: lowest 21.00 m (2019-01-17), highest 22.54 m (2019-05-28), average 21.86 m, 365 days measured2020: lowest 20.93 m (2020-10-11), highest 22.32 m (2020-04-16), average 21.75 m, 366 days measured2021: lowest 20.97 m (2021-06-22), highest 21.99 m (2021-03-29), average 21.38 m, 365 days measured2022: lowest 20.65 m (2022-11-10), highest 22.15 m (2022-05-02), average 21.47 m, 365 days measured2023: lowest 21.03 m (2023-02-27), highest 22.33 m (2023-05-11), average 21.50 m, 365 days measured2024: lowest 20.78 m (2024-12-06), highest 22.01 m (2024-08-11), average 21.30 m, 366 days measured2025: lowest 20.64 m (2025-09-21), highest 21.94 m (2025-05-11), average 21.10 m, 365 days measured2026: lowest 20.93 m (2026-10-12), highest 21.32 m (2026-09-24), average 21.10 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.

  • 193419.970 m on Nov 11
  • 193520.060 m on Nov 3
  • 196520.090 m on Mar 28
  • 193320.130 m on Nov 7
  • 193620.160 m on Feb 28

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)21.10320.934Oct 1221.317Sep 24
202521.10020.642Sep 2121.938May 11
202421.30220.781Dec 622.009Aug 11
202321.49821.033Feb 2722.326May 11
202221.47420.648Nov 1022.145May 2
202121.37620.969Jun 2221.987Mar 29
202021.74820.930Oct 1122.318Apr 16
201921.85721.004Jan 1722.542May 28
201821.63520.801Oct 722.167May 1
201721.74420.705Jan 422.557May 18
201621.26920.729Oct 1922.184Mar 18
201521.21720.705Apr 121.676Feb 3
201421.38220.834Apr 322.173Apr 12
201321.14920.708Jan 1321.756Apr 26
201220.97120.577Nov 2622.066Mar 18
201121.37020.923Oct 1122.122May 5
201020.99520.590May 2021.740Oct 2
200921.41320.850Dec 2622.110Apr 8
200821.37820.550Jan 122.230Apr 21
200721.09420.440Dec 2322.050Apr 18
200621.31320.710Jun 2622.200Dec 3
200521.23120.730Aug 2722.200Apr 4
200421.32020.850Nov 2421.900Jan 29
200321.00320.410Feb 221.930Dec 1
200221.10520.480Dec 2222.200Jun 18
200120.84020.530Jun 2122.060Apr 13
200021.08620.590Nov 721.720May 13
199920.89420.540Oct 221.770Apr 9
199821.45820.670Nov 1922.390Mar 30
199721.68221.150Dec 1122.360May 20
1996 (323 days)21.57221.140Jan 1922.230May 13
199521.13120.700Jul 1521.850Mar 18
199421.40120.860Jan 222.060Apr 17
199321.60820.790Dec 3022.460Apr 23
199221.34920.760Feb 2321.950Nov 28
199121.28420.640Nov 1722.460Apr 23
1990 (303 days)21.35520.940Sep 2522.050Mar 18
198921.16920.590Mar 1521.690Dec 19
198821.20620.800Jul 1121.870May 1
198721.49420.910Jan 2422.310Mar 27
198621.80921.120Jan 1322.270May 27
198521.59520.820Dec 2522.210May 6
198421.58921.070Jan 622.380Apr 7
198321.48621.050Jan 2522.400May 12
198221.41220.990Jan 1222.090Apr 29
198121.51621.010Jan 122.240Feb 26
198021.50420.830Dec 2922.100Apr 16
197921.60720.930Jan 2822.370May 2
197821.49420.580Dec 1922.550Apr 15
197721.40220.590Feb 2722.330Mar 16
197621.76220.830Dec 622.800Apr 1
197521.52321.010Jan 2522.620Apr 21
197421.82721.310Nov 2022.750May 23
197321.84121.070Dec 2722.740Mar 19
197221.66320.850Feb 1422.550May 7
197121.31220.740Dec 522.680Apr 22
197021.30420.710Mar 2221.720May 6
196921.44120.940Dec 2522.090Apr 24
196821.24620.760Dec 2521.940Apr 2
196721.19120.480Mar 2621.850Nov 15
196620.97920.600Oct 921.660Jan 14
196520.66020.090Mar 2821.140Dec 15
196420.58520.320Apr 521.470Jan 15
1963 (214 days)20.64120.430Oct 1421.370Dec 27
1962 (235 days)20.87120.490May 2821.590Apr 10
196121.05420.570Mar 1921.530May 29
196021.22620.420Oct 1822.350May 18
195920.96020.500Oct 1921.810Apr 10
195820.96420.680Nov 1221.630Apr 5
195721.05320.740Oct 521.630Jan 10
195621.18520.670Dec 3121.850May 1
195521.29320.800Oct 622.420Apr 23
195421.29520.690Jan 122.310Apr 18
195321.20220.630Nov 922.150Mar 31
195221.45720.860Nov 1922.410Apr 7
195121.45820.980Oct 322.810Apr 17
195021.09520.610Jan 322.000Apr 6
194920.95220.370Dec 121.890Mar 29
194821.11320.610Feb 121.960Mar 23
194721.50020.820Dec 222.710Jun 4
194621.11620.680Oct 1021.810Mar 16
194521.23520.410Jan 1822.080Apr 5
194420.97920.530Nov 2121.610Jan 1
194321.36320.720Jan 2222.850May 14
194220.86820.420Oct 1821.610Apr 20
194120.73420.320Sep 121.680Apr 29
194020.79820.260Mar 321.510Jun 4
193920.86620.320Nov 2621.900Apr 24
193820.91820.380Dec 422.190Mar 26
193720.93420.460Oct 1721.960Apr 8
193620.71320.160Feb 2822.010May 20
193520.49520.060Nov 321.030May 3
193420.53019.970Nov 1122.010Apr 14
193320.69720.130Nov 721.840Apr 19
193220.93620.390Jan 221.990Apr 13
193120.62720.320Oct 1521.140Jan 19
193021.26320.580Dec 2521.880Apr 9
192921.42720.910Oct 3122.510May 9
192821.37120.910Sep 922.480Apr 10
192721.02620.560Sep 2821.690Mar 20
192620.90420.400Mar 2121.900Apr 27
192520.85820.380Oct 2521.740Mar 31
192421.00520.540Jan 122.010May 19
192320.79820.250Mar 421.830May 23
192221.01420.470Feb 2522.280Apr 21
192120.95320.470Nov 321.730May 9
192020.91020.470Nov 2321.600Mar 28
191921.36520.950Feb 1222.470May 27
191821.20120.770Mar 1122.090Apr 4
191721.24320.580Mar 1221.860Apr 4
191621.21820.630Mar 2722.440May 21
1915 (217 days)20.67620.460Dec 1321.010May 23

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

Monthly averages

MonthAverageLowestHighest
January21.22020.22022.151
February21.21720.14022.240
March21.24020.09022.740
April21.62320.11022.810
May21.59120.39022.850
June21.35020.36022.710
July21.19520.28022.475
August21.07820.12022.020
September20.99920.03021.940
October20.98020.04022.140
November21.03019.97022.100
December21.08920.11022.200

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Daily levels as CSV (39,852 rows; credit the original agencies listed below)