Country: Canada
United StatesCanadaUnited Kingdom

Gull Lake water level history

Daily records since 1924 · Level today: 897.958 m

Highest on record
901.449 m
Sep 2, 1924
Lowest on record
897.939 m
Oct 17, 2026
Today
897.958 m
Oct 23, 2026
Years of data
102
since 1924

In short

On average the lake is lowest in October (898.808 m) and highest in December (899.779 m).

Gull Lake level, all years

Loading chart…

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

Each year's lowest and highest level

897.7898.7899.7900.7901.71924193719501963197619892002201520261924: lowest 901.45 m (1924-09-02), highest 901.45 m (1924-09-02), average 901.45 m, 1 days measured1938: lowest 900.63 m (1938-07-17), highest 900.63 m (1938-07-17), average 900.63 m, 1 days measured1939: lowest 900.50 m (1939-09-08), highest 900.63 m (1939-05-05), average 900.56 m, 2 days measured1940: lowest 900.50 m (1940-08-12), highest 900.67 m (1940-05-21), average 900.59 m, 2 days measured1941: lowest 900.16 m (1941-09-24), highest 900.16 m (1941-09-24), average 900.16 m, 1 days measured1942: lowest 900.10 m (1942-10-16), highest 900.20 m (1942-06-02), average 900.15 m, 2 days measured1943: lowest 900.11 m (1943-09-08), highest 900.20 m (1943-05-19), average 900.16 m, 2 days measured1944: lowest 900.01 m (1944-04-25), highest 900.16 m (1944-08-30), average 900.09 m, 2 days measured1945: lowest 900.06 m (1945-07-07), highest 900.06 m (1945-07-07), average 900.06 m, 1 days measured1946: lowest 900.06 m (1946-06-20), highest 900.21 m (1946-05-27), average 900.13 m, 2 days measured1949: lowest 900.13 m (1949-02-01), highest 900.13 m (1949-02-01), average 900.13 m, 1 days measured1953: lowest 899.76 m (1953-09-29), highest 899.76 m (1953-09-29), average 899.76 m, 1 days measured1954: lowest 899.91 m (1954-06-15), highest 899.91 m (1954-06-15), average 899.91 m, 1 days measured1955: lowest 900.19 m (1955-10-05), highest 900.37 m (1955-06-27), average 900.28 m, 3 days measured1956: lowest 900.12 m (1956-10-29), highest 900.30 m (1956-05-25), average 900.22 m, 3 days measured1957: lowest 899.93 m (1957-09-10), highest 900.20 m (1957-05-16), average 900.09 m, 3 days measured1958: lowest 899.78 m (1958-12-03), highest 900.05 m (1958-05-14), average 899.92 m, 3 days measured1959: lowest 899.62 m (1959-10-28), highest 899.74 m (1959-06-04), average 899.68 m, 2 days measured1960: lowest 899.54 m (1960-09-14), highest 899.70 m (1960-06-22), average 899.62 m, 2 days measured1961: lowest 899.31 m (1961-08-29), highest 899.51 m (1961-06-07), average 899.39 m, 3 days measured1962: lowest 899.10 m (1962-09-10), highest 899.30 m (1962-06-08), average 899.20 m, 2 days measured1963: lowest 898.97 m (1963-10-23), highest 899.17 m (1963-07-17), average 899.09 m, 4 days measured1964: lowest 898.96 m (1964-09-10), highest 899.14 m (1964-05-07), average 899.05 m, 2 days measured1965: lowest 899.32 m (1965-11-04), highest 899.41 m (1965-08-18), average 899.36 m, 3 days measured1966: lowest 899.24 m (1966-10-13), highest 899.43 m (1966-05-18), average 899.35 m, 5 days measured1967: lowest 898.93 m (1967-11-09), highest 899.32 m (1967-04-18), average 899.19 m, 9 days measured1968: lowest 898.83 m (1968-10-31), highest 899.02 m (1968-03-07), average 898.91 m, 7 days measured1969: lowest 898.71 m (1969-09-29), highest 898.90 m (1969-04-17), average 898.83 m, 7 days measured1970: lowest 898.65 m (1970-10-16), highest 898.87 m (1970-07-10), average 898.78 m, 9 days measured1971: lowest 898.69 m (1971-10-06), highest 898.88 m (1971-05-17), average 898.78 m, 10 days measured1972: lowest 898.72 m (1972-03-16), highest 898.90 m (1972-06-26), average 898.83 m, 53 days measured1973: lowest 898.73 m (1973-11-05), highest 898.90 m (1973-07-08), average 898.85 m, 64 days measured1974: lowest 898.83 m (1974-03-05), highest 899.10 m (1974-06-07), average 899.01 m, 142 days measured1975: lowest 898.76 m (1975-10-28), highest 899.07 m (1975-05-16), average 898.93 m, 138 days measured1976: lowest 898.55 m (1976-10-27), highest 898.87 m (1976-05-11), average 898.73 m, 61 days measured1977: lowest 898.54 m (1977-10-25), highest 898.71 m (1977-05-30), average 898.61 m, 54 days measured1978: lowest 898.54 m (1978-08-05), highest 898.65 m (1978-06-03), average 898.61 m, 57 days measured1979: lowest 898.46 m (1979-11-07), highest 898.71 m (1979-05-30), average 898.60 m, 17 days measured1980: lowest 898.40 m (1980-06-17), highest 898.73 m (1980-10-09), average 898.61 m, 69 days measured1981: lowest 898.71 m (1981-03-11), highest 899.12 m (1981-07-30), average 898.94 m, 30 days measured1982: lowest 899.02 m (1982-03-10), highest 899.40 m (1982-07-09), average 899.30 m, 45 days measured1983: lowest 899.11 m (1983-10-24), highest 899.39 m (1983-04-25), average 899.31 m, 52 days measured1984: lowest 899.03 m (1984-11-01), highest 899.27 m (1984-06-15), average 899.17 m, 55 days measured1985: lowest 898.72 m (1985-11-07), highest 899.17 m (1985-04-25), average 898.95 m, 83 days measured1986: lowest 898.99 m (1986-03-08), highest 899.21 m (1986-06-02), average 899.13 m, 92 days measured1987: lowest 898.90 m (1987-11-04), highest 899.15 m (1987-05-09), average 899.04 m, 75 days measured1988: lowest 898.72 m (1988-11-02), highest 898.94 m (1988-06-05), average 898.82 m, 99 days measured1989: lowest 898.77 m (1989-02-23), highest 898.98 m (1989-06-21), average 898.91 m, 104 days measured1990: lowest 898.91 m (1990-02-22), highest 899.38 m (1990-07-16), average 899.18 m, 83 days measured1991: lowest 899.16 m (1991-02-27), highest 899.34 m (1991-07-06), average 899.26 m, 72 days measured1992: lowest 899.04 m (1992-11-04), highest 899.28 m (1992-06-12), average 899.20 m, 83 days measured1993: lowest 898.95 m (1993-11-02), highest 899.20 m (1993-05-13), average 899.10 m, 82 days measured1994: lowest 898.88 m (1994-10-24), highest 899.09 m (1994-06-13), average 899.01 m, 80 days measured1995: lowest 898.76 m (1995-10-27), highest 898.98 m (1995-06-07), average 898.91 m, 80 days measured1996: lowest 898.81 m (1996-02-26), highest 898.99 m (1996-07-17), average 898.91 m, 61 days measured1997: lowest 898.92 m (1997-09-01), highest 899.09 m (1997-06-23), average 899.00 m, 77 days measured1998: lowest 898.76 m (1998-09-30), highest 898.98 m (1998-07-13), average 898.88 m, 114 days measured1999: lowest 898.83 m (1999-02-24), highest 899.07 m (1999-08-21), average 898.97 m, 184 days measured2000: lowest 898.85 m (2000-10-26), highest 899.10 m (2000-07-26), average 898.98 m, 180 days measured2001: lowest 898.61 m (2001-10-28), highest 898.90 m (2001-05-01), average 898.79 m, 181 days measured2002: lowest 898.51 m (2002-10-24), highest 898.81 m (2002-06-06), average 898.65 m, 185 days measured2003: lowest 898.49 m (2003-10-25), highest 898.85 m (2003-05-29), average 898.68 m, 186 days measured2004: lowest 898.33 m (2004-10-27), highest 898.61 m (2004-06-07), average 898.53 m, 169 days measured2005: lowest 898.50 m (2005-08-11), highest 898.59 m (2005-05-11), average 898.55 m, 137 days measured2006: lowest 898.49 m (2006-09-12), highest 898.60 m (2006-05-07), average 898.55 m, 141 days measured2007: lowest 898.74 m (2007-05-01), highest 899.09 m (2007-07-04), average 898.95 m, 184 days measured2008: lowest 898.84 m (2008-10-31), highest 899.06 m (2008-06-19), average 898.96 m, 125 days measured2009: lowest 898.68 m (2009-10-14), highest 898.94 m (2009-05-22), average 898.84 m, 184 days measured2010: lowest 898.75 m (2010-05-01), highest 898.93 m (2010-07-21), average 898.85 m, 162 days measured2011: lowest 899.02 m (2011-05-01), highest 899.35 m (2011-08-13), average 899.19 m, 184 days measured2012: lowest 899.18 m (2012-10-30), highest 899.40 m (2012-08-01), average 899.30 m, 170 days measured2013: lowest 899.17 m (2013-10-31), highest 899.43 m (2013-07-21), average 899.31 m, 168 days measured2014: lowest 899.21 m (2014-10-26), highest 899.54 m (2014-05-28), average 899.39 m, 170 days measured2015: lowest 899.09 m (2015-10-30), highest 899.37 m (2015-05-11), average 899.21 m, 171 days measured2016: lowest 899.00 m (2016-10-09), highest 899.13 m (2016-06-01), average 899.05 m, 184 days measured2017: lowest 898.87 m (2017-10-29), highest 899.21 m (2017-06-12), average 899.07 m, 191 days measured2018: lowest 898.84 m (2018-09-12), highest 899.13 m (2018-05-19), average 898.97 m, 189 days measured2019: lowest 898.78 m (2019-10-28), highest 899.00 m (2019-05-16), average 898.92 m, 184 days measured2020: lowest 898.88 m (2020-10-21), highest 899.10 m (2020-07-24), average 899.00 m, 188 days measured2021: lowest 898.70 m (2021-10-21), highest 898.94 m (2021-05-26), average 898.83 m, 188 days measured2022: lowest 898.61 m (2022-10-29), highest 898.90 m (2022-07-07), average 898.78 m, 195 days measured2023: lowest 898.45 m (2023-10-31), highest 898.72 m (2023-05-14), average 898.60 m, 189 days measured2024: lowest 898.20 m (2024-10-21), highest 898.54 m (2024-05-05), average 898.39 m, 197 days measured2026: lowest 897.94 m (2026-10-17), highest 898.02 m (2026-09-24), average 897.99 m, 30 days measured
897.7898.7899.7900.7901.7192419501976200220261924: lowest 901.45 m (1924-09-02), highest 901.45 m (1924-09-02), average 901.45 m, 1 days measured1938: lowest 900.63 m (1938-07-17), highest 900.63 m (1938-07-17), average 900.63 m, 1 days measured1939: lowest 900.50 m (1939-09-08), highest 900.63 m (1939-05-05), average 900.56 m, 2 days measured1940: lowest 900.50 m (1940-08-12), highest 900.67 m (1940-05-21), average 900.59 m, 2 days measured1941: lowest 900.16 m (1941-09-24), highest 900.16 m (1941-09-24), average 900.16 m, 1 days measured1942: lowest 900.10 m (1942-10-16), highest 900.20 m (1942-06-02), average 900.15 m, 2 days measured1943: lowest 900.11 m (1943-09-08), highest 900.20 m (1943-05-19), average 900.16 m, 2 days measured1944: lowest 900.01 m (1944-04-25), highest 900.16 m (1944-08-30), average 900.09 m, 2 days measured1945: lowest 900.06 m (1945-07-07), highest 900.06 m (1945-07-07), average 900.06 m, 1 days measured1946: lowest 900.06 m (1946-06-20), highest 900.21 m (1946-05-27), average 900.13 m, 2 days measured1949: lowest 900.13 m (1949-02-01), highest 900.13 m (1949-02-01), average 900.13 m, 1 days measured1953: lowest 899.76 m (1953-09-29), highest 899.76 m (1953-09-29), average 899.76 m, 1 days measured1954: lowest 899.91 m (1954-06-15), highest 899.91 m (1954-06-15), average 899.91 m, 1 days measured1955: lowest 900.19 m (1955-10-05), highest 900.37 m (1955-06-27), average 900.28 m, 3 days measured1956: lowest 900.12 m (1956-10-29), highest 900.30 m (1956-05-25), average 900.22 m, 3 days measured1957: lowest 899.93 m (1957-09-10), highest 900.20 m (1957-05-16), average 900.09 m, 3 days measured1958: lowest 899.78 m (1958-12-03), highest 900.05 m (1958-05-14), average 899.92 m, 3 days measured1959: lowest 899.62 m (1959-10-28), highest 899.74 m (1959-06-04), average 899.68 m, 2 days measured1960: lowest 899.54 m (1960-09-14), highest 899.70 m (1960-06-22), average 899.62 m, 2 days measured1961: lowest 899.31 m (1961-08-29), highest 899.51 m (1961-06-07), average 899.39 m, 3 days measured1962: lowest 899.10 m (1962-09-10), highest 899.30 m (1962-06-08), average 899.20 m, 2 days measured1963: lowest 898.97 m (1963-10-23), highest 899.17 m (1963-07-17), average 899.09 m, 4 days measured1964: lowest 898.96 m (1964-09-10), highest 899.14 m (1964-05-07), average 899.05 m, 2 days measured1965: lowest 899.32 m (1965-11-04), highest 899.41 m (1965-08-18), average 899.36 m, 3 days measured1966: lowest 899.24 m (1966-10-13), highest 899.43 m (1966-05-18), average 899.35 m, 5 days measured1967: lowest 898.93 m (1967-11-09), highest 899.32 m (1967-04-18), average 899.19 m, 9 days measured1968: lowest 898.83 m (1968-10-31), highest 899.02 m (1968-03-07), average 898.91 m, 7 days measured1969: lowest 898.71 m (1969-09-29), highest 898.90 m (1969-04-17), average 898.83 m, 7 days measured1970: lowest 898.65 m (1970-10-16), highest 898.87 m (1970-07-10), average 898.78 m, 9 days measured1971: lowest 898.69 m (1971-10-06), highest 898.88 m (1971-05-17), average 898.78 m, 10 days measured1972: lowest 898.72 m (1972-03-16), highest 898.90 m (1972-06-26), average 898.83 m, 53 days measured1973: lowest 898.73 m (1973-11-05), highest 898.90 m (1973-07-08), average 898.85 m, 64 days measured1974: lowest 898.83 m (1974-03-05), highest 899.10 m (1974-06-07), average 899.01 m, 142 days measured1975: lowest 898.76 m (1975-10-28), highest 899.07 m (1975-05-16), average 898.93 m, 138 days measured1976: lowest 898.55 m (1976-10-27), highest 898.87 m (1976-05-11), average 898.73 m, 61 days measured1977: lowest 898.54 m (1977-10-25), highest 898.71 m (1977-05-30), average 898.61 m, 54 days measured1978: lowest 898.54 m (1978-08-05), highest 898.65 m (1978-06-03), average 898.61 m, 57 days measured1979: lowest 898.46 m (1979-11-07), highest 898.71 m (1979-05-30), average 898.60 m, 17 days measured1980: lowest 898.40 m (1980-06-17), highest 898.73 m (1980-10-09), average 898.61 m, 69 days measured1981: lowest 898.71 m (1981-03-11), highest 899.12 m (1981-07-30), average 898.94 m, 30 days measured1982: lowest 899.02 m (1982-03-10), highest 899.40 m (1982-07-09), average 899.30 m, 45 days measured1983: lowest 899.11 m (1983-10-24), highest 899.39 m (1983-04-25), average 899.31 m, 52 days measured1984: lowest 899.03 m (1984-11-01), highest 899.27 m (1984-06-15), average 899.17 m, 55 days measured1985: lowest 898.72 m (1985-11-07), highest 899.17 m (1985-04-25), average 898.95 m, 83 days measured1986: lowest 898.99 m (1986-03-08), highest 899.21 m (1986-06-02), average 899.13 m, 92 days measured1987: lowest 898.90 m (1987-11-04), highest 899.15 m (1987-05-09), average 899.04 m, 75 days measured1988: lowest 898.72 m (1988-11-02), highest 898.94 m (1988-06-05), average 898.82 m, 99 days measured1989: lowest 898.77 m (1989-02-23), highest 898.98 m (1989-06-21), average 898.91 m, 104 days measured1990: lowest 898.91 m (1990-02-22), highest 899.38 m (1990-07-16), average 899.18 m, 83 days measured1991: lowest 899.16 m (1991-02-27), highest 899.34 m (1991-07-06), average 899.26 m, 72 days measured1992: lowest 899.04 m (1992-11-04), highest 899.28 m (1992-06-12), average 899.20 m, 83 days measured1993: lowest 898.95 m (1993-11-02), highest 899.20 m (1993-05-13), average 899.10 m, 82 days measured1994: lowest 898.88 m (1994-10-24), highest 899.09 m (1994-06-13), average 899.01 m, 80 days measured1995: lowest 898.76 m (1995-10-27), highest 898.98 m (1995-06-07), average 898.91 m, 80 days measured1996: lowest 898.81 m (1996-02-26), highest 898.99 m (1996-07-17), average 898.91 m, 61 days measured1997: lowest 898.92 m (1997-09-01), highest 899.09 m (1997-06-23), average 899.00 m, 77 days measured1998: lowest 898.76 m (1998-09-30), highest 898.98 m (1998-07-13), average 898.88 m, 114 days measured1999: lowest 898.83 m (1999-02-24), highest 899.07 m (1999-08-21), average 898.97 m, 184 days measured2000: lowest 898.85 m (2000-10-26), highest 899.10 m (2000-07-26), average 898.98 m, 180 days measured2001: lowest 898.61 m (2001-10-28), highest 898.90 m (2001-05-01), average 898.79 m, 181 days measured2002: lowest 898.51 m (2002-10-24), highest 898.81 m (2002-06-06), average 898.65 m, 185 days measured2003: lowest 898.49 m (2003-10-25), highest 898.85 m (2003-05-29), average 898.68 m, 186 days measured2004: lowest 898.33 m (2004-10-27), highest 898.61 m (2004-06-07), average 898.53 m, 169 days measured2005: lowest 898.50 m (2005-08-11), highest 898.59 m (2005-05-11), average 898.55 m, 137 days measured2006: lowest 898.49 m (2006-09-12), highest 898.60 m (2006-05-07), average 898.55 m, 141 days measured2007: lowest 898.74 m (2007-05-01), highest 899.09 m (2007-07-04), average 898.95 m, 184 days measured2008: lowest 898.84 m (2008-10-31), highest 899.06 m (2008-06-19), average 898.96 m, 125 days measured2009: lowest 898.68 m (2009-10-14), highest 898.94 m (2009-05-22), average 898.84 m, 184 days measured2010: lowest 898.75 m (2010-05-01), highest 898.93 m (2010-07-21), average 898.85 m, 162 days measured2011: lowest 899.02 m (2011-05-01), highest 899.35 m (2011-08-13), average 899.19 m, 184 days measured2012: lowest 899.18 m (2012-10-30), highest 899.40 m (2012-08-01), average 899.30 m, 170 days measured2013: lowest 899.17 m (2013-10-31), highest 899.43 m (2013-07-21), average 899.31 m, 168 days measured2014: lowest 899.21 m (2014-10-26), highest 899.54 m (2014-05-28), average 899.39 m, 170 days measured2015: lowest 899.09 m (2015-10-30), highest 899.37 m (2015-05-11), average 899.21 m, 171 days measured2016: lowest 899.00 m (2016-10-09), highest 899.13 m (2016-06-01), average 899.05 m, 184 days measured2017: lowest 898.87 m (2017-10-29), highest 899.21 m (2017-06-12), average 899.07 m, 191 days measured2018: lowest 898.84 m (2018-09-12), highest 899.13 m (2018-05-19), average 898.97 m, 189 days measured2019: lowest 898.78 m (2019-10-28), highest 899.00 m (2019-05-16), average 898.92 m, 184 days measured2020: lowest 898.88 m (2020-10-21), highest 899.10 m (2020-07-24), average 899.00 m, 188 days measured2021: lowest 898.70 m (2021-10-21), highest 898.94 m (2021-05-26), average 898.83 m, 188 days measured2022: lowest 898.61 m (2022-10-29), highest 898.90 m (2022-07-07), average 898.78 m, 195 days measured2023: lowest 898.45 m (2023-10-31), highest 898.72 m (2023-05-14), average 898.60 m, 189 days measured2024: lowest 898.20 m (2024-10-21), highest 898.54 m (2024-05-05), average 898.39 m, 197 days measured2026: lowest 897.94 m (2026-10-17), highest 898.02 m (2026-09-24), average 897.99 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.

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)897.986897.939Oct 17898.023Sep 24
2024 (197 days)898.389898.203Oct 21898.539May 5
2023 (189 days)898.598898.450Oct 31898.716May 14
2022 (195 days)898.775898.613Oct 29898.900Jul 7
2021 (188 days)898.832898.702Oct 21898.942May 26
2020 (188 days)899.000898.883Oct 21899.099Jul 24
2019 (184 days)898.916898.777Oct 28899.001May 16
2018 (189 days)898.969898.838Sep 12899.130May 19
2017 (191 days)899.072898.867Oct 29899.214Jun 12
2016 (184 days)899.054898.997Oct 9899.128Jun 1
2015 (171 days)899.214899.088Oct 30899.367May 11
2014 (170 days)899.388899.212Oct 26899.536May 28
2013 (168 days)899.309899.174Oct 31899.432Jul 21
2012 (170 days)899.304899.175Oct 30899.404Aug 1
2011 (184 days)899.189899.022May 1899.347Aug 13
2010 (162 days)898.853898.754May 1898.933Jul 21
2009 (184 days)898.843898.676Oct 14898.943May 22
2008 (125 days)898.957898.839Oct 31899.061Jun 19
2007 (184 days)898.953898.735May 1899.090Jul 4
2006 (141 days)898.553898.489Sep 12898.600May 7
2005 (137 days)898.553898.503Aug 11898.593May 11
2004 (169 days)898.530898.330Oct 27898.605Jun 7
2003 (186 days)898.681898.494Oct 25898.854May 29
2002 (185 days)898.652898.511Oct 24898.814Jun 6
2001 (181 days)898.794898.606Oct 28898.898May 1
2000 (180 days)898.978898.850Oct 26899.100Jul 26
1999 (184 days)898.972898.832Feb 24899.068Aug 21
1998 (114 days)898.877898.764Sep 30898.984Jul 13
1997 (77 days)898.998898.919Sep 1899.089Jun 23
1996 (61 days)898.914898.810Feb 26898.994Jul 17
1995 (80 days)898.912898.762Oct 27898.977Jun 7
1994 (80 days)899.012898.881Oct 24899.088Jun 13
1993 (82 days)899.096898.949Nov 2899.198May 13
1992 (83 days)899.200899.037Nov 4899.280Jun 12
1991 (72 days)899.259899.164Feb 27899.342Jul 6
1990 (83 days)899.179898.905Feb 22899.382Jul 16
1989 (104 days)898.912898.771Feb 23898.978Jun 21
1988 (99 days)898.819898.720Nov 2898.938Jun 5
1987 (75 days)899.040898.895Nov 4899.145May 9
1986 (92 days)899.125898.993Mar 8899.206Jun 2
1985 (83 days)898.946898.718Nov 7899.168Apr 25
1984 (55 days)899.169899.028Nov 1899.272Jun 15
1983 (52 days)899.312899.112Oct 24899.389Apr 25
1982 (45 days)899.297899.016Mar 10899.395Jul 9
1981 (30 days)898.940898.705Mar 11899.118Jul 30
1980 (69 days)898.615898.403Jun 17898.728Oct 9
1979 (17 days)898.602898.463Nov 7898.712May 30
1978 (57 days)898.607898.544Aug 5898.654Jun 3
1977 (54 days)898.609898.538Oct 25898.706May 30
1976 (61 days)898.730898.547Oct 27898.870May 11
1975 (138 days)898.934898.761Oct 28899.066May 16
1974 (142 days)899.008898.825Mar 5899.102Jun 7
1973 (64 days)898.845898.727Nov 5898.898Jul 8
1972 (53 days)898.834898.715Mar 16898.901Jun 26
1971 (10 days)898.778898.694Oct 6898.877May 17
1970 (9 days)898.778898.651Oct 16898.870Jul 10
1969 (7 days)898.827898.709Sep 29898.904Apr 17
1968 (7 days)898.909898.828Oct 31899.017Mar 7
1967 (9 days)899.187898.931Nov 9899.322Apr 18
1966 (5 days)899.345899.239Oct 13899.434May 18
1965 (3 days)899.360899.315Nov 4899.410Aug 18
1964 (2 days)899.049898.962Sep 10899.136May 7
1963 (4 days)899.087898.971Oct 23899.172Jul 17
1962 (2 days)899.203899.102Sep 10899.303Jun 8
1961 (3 days)899.393899.309Aug 29899.514Jun 7
1960 (2 days)899.617899.538Sep 14899.696Jun 22
1959 (2 days)899.680899.620Oct 28899.739Jun 4
1958 (3 days)899.922899.779Dec 3900.050May 14
1957 (3 days)900.085899.931Sep 10900.196May 16
1956 (3 days)900.224900.117Oct 29900.300May 25
1955 (3 days)900.284900.187Oct 5900.370Jun 27
1954 (1 days)899.913899.913Jun 15899.913Jun 15
1953 (1 days)899.764899.764Sep 29899.764Sep 29
1949 (1 days)900.132900.132Feb 1900.132Feb 1
1946 (2 days)900.134900.056Jun 20900.212May 27
1945 (1 days)900.056900.056Jul 7900.056Jul 7
1944 (2 days)900.087900.010Apr 25900.163Aug 30
1943 (2 days)900.155900.114Sep 8900.196May 19
1942 (2 days)900.149900.102Oct 16900.196Jun 2
1941 (1 days)900.157900.157Sep 24900.157Sep 24
1940 (2 days)900.585900.504Aug 12900.666May 21
1939 (2 days)900.562900.498Sep 8900.626May 5
1938 (1 days)900.626900.626Jul 17900.626Jul 17
1924 (1 days)901.449901.449Sep 2901.449Sep 2

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

Monthly averages

MonthAverageLowestHighest
February898.963898.560900.132
March898.903898.530899.302
April898.877898.490900.010
May898.958898.468900.666
June898.982898.403900.370
July898.985898.376900.626
August898.930898.323900.504
September898.867897.991901.449
October898.808897.939900.187
November898.867898.463899.315
December899.779899.779899.779

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Daily levels as CSV (6,734 rows; credit the original agencies listed below)