Country: Canada
United StatesCanadaUnited Kingdom

Sylvan Lake water level history

Daily records since 1918 · Level today: 936.001 m

Highest on record
937.248 m
Jul 6, 1955
Lowest on record
936.005 m
Oct 21, 2026
Today
936.001 m
Oct 23, 2026
Years of data
108
since 1918

In short

On average the lake is lowest in February (936.519 m) and highest in July (936.790 m).

Sylvan Lake level, all years

Loading chart…

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

Each year's lowest and highest level

935.9936.3936.6937.0937.31918193219461960197419882002201620261918: lowest 936.71 m (1918-10-28), highest 936.80 m (1918-10-01), average 936.74 m, 3 days measured1919: lowest 936.53 m (1919-10-27), highest 936.83 m (1919-05-31), average 936.71 m, 16 days measured1920: lowest 936.55 m (1920-11-22), highest 936.94 m (1920-06-15), average 936.76 m, 15 days measured1921: lowest 936.60 m (1921-04-07), highest 936.87 m (1921-06-11), average 936.78 m, 10 days measured1922: lowest 936.54 m (1922-05-24), highest 936.65 m (1922-08-15), average 936.60 m, 9 days measured1923: lowest 936.65 m (1923-06-19), highest 936.70 m (1923-11-23), average 936.67 m, 2 days measured1924: lowest 936.58 m (1924-06-25), highest 936.61 m (1924-05-08), average 936.59 m, 4 days measured1925: lowest 936.54 m (1925-08-25), highest 936.57 m (1925-05-15), average 936.55 m, 2 days measured1926: lowest 936.68 m (1926-05-13), highest 936.75 m (1926-06-22), average 936.70 m, 3 days measured1927: lowest 937.13 m (1927-06-17), highest 937.15 m (1927-08-09), average 937.14 m, 2 days measured1928: lowest 936.95 m (1928-09-26), highest 937.14 m (1928-07-25), average 937.03 m, 3 days measured1929: lowest 936.54 m (1929-10-09), highest 936.85 m (1929-06-20), average 936.69 m, 3 days measured1930: lowest 936.47 m (1930-09-30), highest 936.57 m (1930-06-05), average 936.53 m, 5 days measured1939: lowest 936.01 m (1939-09-08), highest 936.21 m (1939-06-29), average 936.11 m, 2 days measured1940: lowest 936.28 m (1940-05-21), highest 936.28 m (1940-05-21), average 936.28 m, 1 days measured1955: lowest 936.94 m (1955-10-07), highest 937.25 m (1955-07-06), average 937.13 m, 4 days measured1956: lowest 936.80 m (1956-10-29), highest 937.01 m (1956-08-08), average 936.92 m, 6 days measured1957: lowest 936.66 m (1957-11-20), highest 936.89 m (1957-05-23), average 936.80 m, 7 days measured1958: lowest 936.53 m (1958-10-17), highest 936.79 m (1958-07-29), average 936.70 m, 6 days measured1959: lowest 936.48 m (1959-10-29), highest 936.61 m (1959-08-24), average 936.57 m, 6 days measured1960: lowest 936.49 m (1960-10-11), highest 936.67 m (1960-07-12), average 936.59 m, 7 days measured1961: lowest 936.39 m (1961-07-25), highest 936.61 m (1961-03-29), average 936.47 m, 4 days measured1962: lowest 936.26 m (1962-09-18), highest 936.36 m (1962-08-07), average 936.32 m, 4 days measured1963: lowest 936.08 m (1963-08-14), highest 936.25 m (1963-05-17), average 936.14 m, 5 days measured1964: lowest 936.05 m (1964-10-29), highest 936.21 m (1964-05-28), average 936.15 m, 7 days measured1965: lowest 936.30 m (1965-05-04), highest 936.54 m (1965-08-18), average 936.42 m, 6 days measured1966: lowest 936.50 m (1966-10-13), highest 936.59 m (1966-06-08), average 936.56 m, 5 days measured1967: lowest 936.31 m (1967-11-07), highest 936.65 m (1967-06-28), average 936.52 m, 9 days measured1968: lowest 936.33 m (1968-11-04), highest 936.44 m (1968-10-01), average 936.39 m, 7 days measured1969: lowest 936.38 m (1969-10-28), highest 936.57 m (1969-05-14), average 936.46 m, 7 days measured1970: lowest 936.33 m (1970-11-05), highest 936.58 m (1970-07-09), average 936.44 m, 10 days measured1971: lowest 936.37 m (1971-11-03), highest 936.66 m (1971-07-14), average 936.59 m, 41 days measured1972: lowest 936.45 m (1972-03-16), highest 936.67 m (1972-07-11), average 936.55 m, 12 days measured1973: lowest 936.48 m (1973-11-05), highest 936.69 m (1973-07-09), average 936.66 m, 76 days measured1974: lowest 936.55 m (1974-02-25), highest 936.80 m (1974-07-11), average 936.70 m, 74 days measured1975: lowest 936.46 m (1975-10-28), highest 936.79 m (1975-05-19), average 936.66 m, 69 days measured1976: lowest 936.31 m (1976-10-27), highest 936.60 m (1976-05-29), average 936.51 m, 61 days measured1977: lowest 936.32 m (1977-10-24), highest 936.46 m (1977-05-31), average 936.40 m, 56 days measured1978: lowest 936.26 m (1978-10-21), highest 936.46 m (1978-06-07), average 936.39 m, 64 days measured1979: lowest 936.12 m (1979-11-01), highest 936.40 m (1979-06-09), average 936.31 m, 70 days measured1980: lowest 936.13 m (1980-04-11), highest 936.37 m (1980-08-01), average 936.27 m, 93 days measured1981: lowest 936.20 m (1981-03-31), highest 936.50 m (1981-07-31), average 936.37 m, 92 days measured1982: lowest 936.25 m (1982-03-10), highest 936.67 m (1982-07-29), average 936.52 m, 46 days measured1983: lowest 936.47 m (1983-03-03), highest 936.75 m (1983-08-08), average 936.64 m, 60 days measured1984: lowest 936.40 m (1984-11-01), highest 936.66 m (1984-06-18), average 936.55 m, 114 days measured1985: lowest 936.38 m (1985-11-07), highest 936.61 m (1985-05-02), average 936.50 m, 122 days measured1986: lowest 936.42 m (1986-03-12), highest 936.71 m (1986-08-08), average 936.61 m, 123 days measured1987: lowest 936.47 m (1987-11-02), highest 936.77 m (1987-05-02), average 936.65 m, 115 days measured1988: lowest 936.34 m (1988-10-31), highest 936.52 m (1988-07-06), average 936.46 m, 112 days measured1989: lowest 936.35 m (1989-10-21), highest 936.51 m (1989-05-19), average 936.45 m, 113 days measured1990: lowest 936.26 m (1990-02-22), highest 936.92 m (1990-07-15), average 936.69 m, 104 days measured1991: lowest 936.70 m (1991-02-27), highest 937.09 m (1991-08-20), average 936.93 m, 135 days measured1992: lowest 936.82 m (1992-11-02), highest 937.09 m (1992-06-13), average 936.98 m, 187 days measured1993: lowest 936.81 m (1993-11-01), highest 937.07 m (1993-07-06), average 936.97 m, 189 days measured1994: lowest 936.64 m (1994-10-23), highest 936.91 m (1994-06-14), average 936.80 m, 176 days measured1995: lowest 936.63 m (1995-11-01), highest 936.80 m (1995-07-19), average 936.73 m, 174 days measured1996: lowest 936.66 m (1996-02-26), highest 936.86 m (1996-07-15), average 936.78 m, 171 days measured1997: lowest 936.66 m (1997-10-31), highest 936.93 m (1997-06-19), average 936.83 m, 92 days measured1998: lowest 936.58 m (1998-10-30), highest 936.81 m (1998-07-07), average 936.72 m, 187 days measured1999: lowest 936.61 m (1999-02-25), highest 936.99 m (1999-07-18), average 936.81 m, 173 days measured2000: lowest 936.71 m (2000-10-21), highest 936.97 m (2000-08-01), average 936.85 m, 166 days measured2001: lowest 936.47 m (2001-10-26), highest 936.79 m (2001-07-31), average 936.68 m, 165 days measured2002: lowest 936.42 m (2002-10-31), highest 936.69 m (2002-05-23), average 936.55 m, 171 days measured2003: lowest 936.41 m (2003-10-28), highest 936.77 m (2003-06-11), average 936.62 m, 164 days measured2004: lowest 936.34 m (2004-10-31), highest 936.51 m (2004-07-21), average 936.42 m, 70 days measured2005: lowest 936.42 m (2005-05-05), highest 936.61 m (2005-09-11), average 936.52 m, 184 days measured2006: lowest 936.44 m (2006-10-31), highest 936.63 m (2006-06-16), average 936.53 m, 184 days measured2007: lowest 936.61 m (2007-05-01), highest 937.01 m (2007-07-19), average 936.89 m, 184 days measured2008: lowest 936.86 m (2008-10-31), highest 937.14 m (2008-06-30), average 937.01 m, 184 days measured2009: lowest 936.74 m (2009-10-21), highest 936.99 m (2009-05-18), average 936.90 m, 184 days measured2010: lowest 936.77 m (2010-05-18), highest 937.01 m (2010-07-19), average 936.89 m, 184 days measured2011: lowest 936.98 m (2011-10-27), highest 937.23 m (2011-07-22), average 937.12 m, 184 days measured2012: lowest 936.90 m (2012-10-30), highest 937.21 m (2012-06-19), average 937.13 m, 156 days measured2013: lowest 936.78 m (2013-10-26), highest 937.09 m (2013-07-05), average 936.96 m, 144 days measured2014: lowest 936.75 m (2014-10-30), highest 937.04 m (2014-06-05), average 936.93 m, 184 days measured2015: lowest 936.67 m (2015-10-31), highest 936.85 m (2015-05-06), average 936.78 m, 186 days measured2016: lowest 936.63 m (2016-11-03), highest 936.77 m (2016-08-23), average 936.71 m, 188 days measured2017: lowest 936.60 m (2017-10-30), highest 936.91 m (2017-06-13), average 936.78 m, 190 days measured2018: lowest 936.55 m (2018-10-28), highest 936.85 m (2018-06-11), average 936.71 m, 185 days measured2019: lowest 936.53 m (2019-11-01), highest 936.77 m (2019-07-19), average 936.69 m, 186 days measured2020: lowest 936.68 m (2020-11-04), highest 936.93 m (2020-07-24), average 936.80 m, 190 days measured2021: lowest 936.55 m (2021-11-01), highest 936.82 m (2021-06-16), average 936.72 m, 187 days measured2022: lowest 936.54 m (2022-10-31), highest 936.83 m (2022-07-08), average 936.69 m, 195 days measured2023: lowest 936.45 m (2023-10-31), highest 936.73 m (2023-07-02), average 936.61 m, 189 days measured2024: lowest 936.23 m (2024-10-31), highest 936.58 m (2024-05-30), average 936.45 m, 198 days measured2026: lowest 936.01 m (2026-10-21), highest 936.10 m (2026-09-22), average 936.05 m, 30 days measured
935.9936.3936.6937.0937.3191819451972199920261918: lowest 936.71 m (1918-10-28), highest 936.80 m (1918-10-01), average 936.74 m, 3 days measured1919: lowest 936.53 m (1919-10-27), highest 936.83 m (1919-05-31), average 936.71 m, 16 days measured1920: lowest 936.55 m (1920-11-22), highest 936.94 m (1920-06-15), average 936.76 m, 15 days measured1921: lowest 936.60 m (1921-04-07), highest 936.87 m (1921-06-11), average 936.78 m, 10 days measured1922: lowest 936.54 m (1922-05-24), highest 936.65 m (1922-08-15), average 936.60 m, 9 days measured1923: lowest 936.65 m (1923-06-19), highest 936.70 m (1923-11-23), average 936.67 m, 2 days measured1924: lowest 936.58 m (1924-06-25), highest 936.61 m (1924-05-08), average 936.59 m, 4 days measured1925: lowest 936.54 m (1925-08-25), highest 936.57 m (1925-05-15), average 936.55 m, 2 days measured1926: lowest 936.68 m (1926-05-13), highest 936.75 m (1926-06-22), average 936.70 m, 3 days measured1927: lowest 937.13 m (1927-06-17), highest 937.15 m (1927-08-09), average 937.14 m, 2 days measured1928: lowest 936.95 m (1928-09-26), highest 937.14 m (1928-07-25), average 937.03 m, 3 days measured1929: lowest 936.54 m (1929-10-09), highest 936.85 m (1929-06-20), average 936.69 m, 3 days measured1930: lowest 936.47 m (1930-09-30), highest 936.57 m (1930-06-05), average 936.53 m, 5 days measured1939: lowest 936.01 m (1939-09-08), highest 936.21 m (1939-06-29), average 936.11 m, 2 days measured1940: lowest 936.28 m (1940-05-21), highest 936.28 m (1940-05-21), average 936.28 m, 1 days measured1955: lowest 936.94 m (1955-10-07), highest 937.25 m (1955-07-06), average 937.13 m, 4 days measured1956: lowest 936.80 m (1956-10-29), highest 937.01 m (1956-08-08), average 936.92 m, 6 days measured1957: lowest 936.66 m (1957-11-20), highest 936.89 m (1957-05-23), average 936.80 m, 7 days measured1958: lowest 936.53 m (1958-10-17), highest 936.79 m (1958-07-29), average 936.70 m, 6 days measured1959: lowest 936.48 m (1959-10-29), highest 936.61 m (1959-08-24), average 936.57 m, 6 days measured1960: lowest 936.49 m (1960-10-11), highest 936.67 m (1960-07-12), average 936.59 m, 7 days measured1961: lowest 936.39 m (1961-07-25), highest 936.61 m (1961-03-29), average 936.47 m, 4 days measured1962: lowest 936.26 m (1962-09-18), highest 936.36 m (1962-08-07), average 936.32 m, 4 days measured1963: lowest 936.08 m (1963-08-14), highest 936.25 m (1963-05-17), average 936.14 m, 5 days measured1964: lowest 936.05 m (1964-10-29), highest 936.21 m (1964-05-28), average 936.15 m, 7 days measured1965: lowest 936.30 m (1965-05-04), highest 936.54 m (1965-08-18), average 936.42 m, 6 days measured1966: lowest 936.50 m (1966-10-13), highest 936.59 m (1966-06-08), average 936.56 m, 5 days measured1967: lowest 936.31 m (1967-11-07), highest 936.65 m (1967-06-28), average 936.52 m, 9 days measured1968: lowest 936.33 m (1968-11-04), highest 936.44 m (1968-10-01), average 936.39 m, 7 days measured1969: lowest 936.38 m (1969-10-28), highest 936.57 m (1969-05-14), average 936.46 m, 7 days measured1970: lowest 936.33 m (1970-11-05), highest 936.58 m (1970-07-09), average 936.44 m, 10 days measured1971: lowest 936.37 m (1971-11-03), highest 936.66 m (1971-07-14), average 936.59 m, 41 days measured1972: lowest 936.45 m (1972-03-16), highest 936.67 m (1972-07-11), average 936.55 m, 12 days measured1973: lowest 936.48 m (1973-11-05), highest 936.69 m (1973-07-09), average 936.66 m, 76 days measured1974: lowest 936.55 m (1974-02-25), highest 936.80 m (1974-07-11), average 936.70 m, 74 days measured1975: lowest 936.46 m (1975-10-28), highest 936.79 m (1975-05-19), average 936.66 m, 69 days measured1976: lowest 936.31 m (1976-10-27), highest 936.60 m (1976-05-29), average 936.51 m, 61 days measured1977: lowest 936.32 m (1977-10-24), highest 936.46 m (1977-05-31), average 936.40 m, 56 days measured1978: lowest 936.26 m (1978-10-21), highest 936.46 m (1978-06-07), average 936.39 m, 64 days measured1979: lowest 936.12 m (1979-11-01), highest 936.40 m (1979-06-09), average 936.31 m, 70 days measured1980: lowest 936.13 m (1980-04-11), highest 936.37 m (1980-08-01), average 936.27 m, 93 days measured1981: lowest 936.20 m (1981-03-31), highest 936.50 m (1981-07-31), average 936.37 m, 92 days measured1982: lowest 936.25 m (1982-03-10), highest 936.67 m (1982-07-29), average 936.52 m, 46 days measured1983: lowest 936.47 m (1983-03-03), highest 936.75 m (1983-08-08), average 936.64 m, 60 days measured1984: lowest 936.40 m (1984-11-01), highest 936.66 m (1984-06-18), average 936.55 m, 114 days measured1985: lowest 936.38 m (1985-11-07), highest 936.61 m (1985-05-02), average 936.50 m, 122 days measured1986: lowest 936.42 m (1986-03-12), highest 936.71 m (1986-08-08), average 936.61 m, 123 days measured1987: lowest 936.47 m (1987-11-02), highest 936.77 m (1987-05-02), average 936.65 m, 115 days measured1988: lowest 936.34 m (1988-10-31), highest 936.52 m (1988-07-06), average 936.46 m, 112 days measured1989: lowest 936.35 m (1989-10-21), highest 936.51 m (1989-05-19), average 936.45 m, 113 days measured1990: lowest 936.26 m (1990-02-22), highest 936.92 m (1990-07-15), average 936.69 m, 104 days measured1991: lowest 936.70 m (1991-02-27), highest 937.09 m (1991-08-20), average 936.93 m, 135 days measured1992: lowest 936.82 m (1992-11-02), highest 937.09 m (1992-06-13), average 936.98 m, 187 days measured1993: lowest 936.81 m (1993-11-01), highest 937.07 m (1993-07-06), average 936.97 m, 189 days measured1994: lowest 936.64 m (1994-10-23), highest 936.91 m (1994-06-14), average 936.80 m, 176 days measured1995: lowest 936.63 m (1995-11-01), highest 936.80 m (1995-07-19), average 936.73 m, 174 days measured1996: lowest 936.66 m (1996-02-26), highest 936.86 m (1996-07-15), average 936.78 m, 171 days measured1997: lowest 936.66 m (1997-10-31), highest 936.93 m (1997-06-19), average 936.83 m, 92 days measured1998: lowest 936.58 m (1998-10-30), highest 936.81 m (1998-07-07), average 936.72 m, 187 days measured1999: lowest 936.61 m (1999-02-25), highest 936.99 m (1999-07-18), average 936.81 m, 173 days measured2000: lowest 936.71 m (2000-10-21), highest 936.97 m (2000-08-01), average 936.85 m, 166 days measured2001: lowest 936.47 m (2001-10-26), highest 936.79 m (2001-07-31), average 936.68 m, 165 days measured2002: lowest 936.42 m (2002-10-31), highest 936.69 m (2002-05-23), average 936.55 m, 171 days measured2003: lowest 936.41 m (2003-10-28), highest 936.77 m (2003-06-11), average 936.62 m, 164 days measured2004: lowest 936.34 m (2004-10-31), highest 936.51 m (2004-07-21), average 936.42 m, 70 days measured2005: lowest 936.42 m (2005-05-05), highest 936.61 m (2005-09-11), average 936.52 m, 184 days measured2006: lowest 936.44 m (2006-10-31), highest 936.63 m (2006-06-16), average 936.53 m, 184 days measured2007: lowest 936.61 m (2007-05-01), highest 937.01 m (2007-07-19), average 936.89 m, 184 days measured2008: lowest 936.86 m (2008-10-31), highest 937.14 m (2008-06-30), average 937.01 m, 184 days measured2009: lowest 936.74 m (2009-10-21), highest 936.99 m (2009-05-18), average 936.90 m, 184 days measured2010: lowest 936.77 m (2010-05-18), highest 937.01 m (2010-07-19), average 936.89 m, 184 days measured2011: lowest 936.98 m (2011-10-27), highest 937.23 m (2011-07-22), average 937.12 m, 184 days measured2012: lowest 936.90 m (2012-10-30), highest 937.21 m (2012-06-19), average 937.13 m, 156 days measured2013: lowest 936.78 m (2013-10-26), highest 937.09 m (2013-07-05), average 936.96 m, 144 days measured2014: lowest 936.75 m (2014-10-30), highest 937.04 m (2014-06-05), average 936.93 m, 184 days measured2015: lowest 936.67 m (2015-10-31), highest 936.85 m (2015-05-06), average 936.78 m, 186 days measured2016: lowest 936.63 m (2016-11-03), highest 936.77 m (2016-08-23), average 936.71 m, 188 days measured2017: lowest 936.60 m (2017-10-30), highest 936.91 m (2017-06-13), average 936.78 m, 190 days measured2018: lowest 936.55 m (2018-10-28), highest 936.85 m (2018-06-11), average 936.71 m, 185 days measured2019: lowest 936.53 m (2019-11-01), highest 936.77 m (2019-07-19), average 936.69 m, 186 days measured2020: lowest 936.68 m (2020-11-04), highest 936.93 m (2020-07-24), average 936.80 m, 190 days measured2021: lowest 936.55 m (2021-11-01), highest 936.82 m (2021-06-16), average 936.72 m, 187 days measured2022: lowest 936.54 m (2022-10-31), highest 936.83 m (2022-07-08), average 936.69 m, 195 days measured2023: lowest 936.45 m (2023-10-31), highest 936.73 m (2023-07-02), average 936.61 m, 189 days measured2024: lowest 936.23 m (2024-10-31), highest 936.58 m (2024-05-30), average 936.45 m, 198 days measured2026: lowest 936.01 m (2026-10-21), highest 936.10 m (2026-09-22), average 936.05 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)936.051936.005Oct 21936.104Sep 22
2024 (198 days)936.449936.227Oct 31936.579May 30
2023 (189 days)936.613936.453Oct 31936.728Jul 2
2022 (195 days)936.689936.544Oct 31936.826Jul 8
2021 (187 days)936.720936.546Nov 1936.824Jun 16
2020 (190 days)936.803936.683Nov 4936.928Jul 24
2019 (186 days)936.690936.534Nov 1936.769Jul 19
2018 (185 days)936.708936.552Oct 28936.847Jun 11
2017 (190 days)936.784936.600Oct 30936.910Jun 13
2016 (188 days)936.709936.634Nov 3936.771Aug 23
2015 (186 days)936.782936.673Oct 31936.851May 6
2014 (184 days)936.929936.753Oct 30937.035Jun 5
2013 (144 days)936.958936.775Oct 26937.091Jul 5
2012 (156 days)937.132936.904Oct 30937.213Jun 19
2011 (184 days)937.124936.982Oct 27937.231Jul 22
2010 (184 days)936.889936.771May 18937.010Jul 19
2009 (184 days)936.904936.740Oct 21936.994May 18
2008 (184 days)937.014936.861Oct 31937.142Jun 30
2007 (184 days)936.894936.609May 1937.013Jul 19
2006 (184 days)936.533936.438Oct 31936.625Jun 16
2005 (184 days)936.523936.419May 5936.610Sep 11
2004 (70 days)936.422936.338Oct 31936.508Jul 21
2003 (164 days)936.615936.410Oct 28936.770Jun 11
2002 (171 days)936.554936.415Oct 31936.685May 23
2001 (165 days)936.679936.474Oct 26936.789Jul 31
2000 (166 days)936.849936.707Oct 21936.966Aug 1
1999 (173 days)936.814936.610Feb 25936.989Jul 18
1998 (187 days)936.717936.575Oct 30936.812Jul 7
1997 (92 days)936.828936.655Oct 31936.927Jun 19
1996 (171 days)936.780936.657Feb 26936.860Jul 15
1995 (174 days)936.732936.630Nov 1936.801Jul 19
1994 (176 days)936.802936.637Oct 23936.905Jun 14
1993 (189 days)936.968936.807Nov 1937.069Jul 6
1992 (187 days)936.985936.823Nov 2937.092Jun 13
1991 (135 days)936.933936.695Feb 27937.087Aug 20
1990 (104 days)936.686936.259Feb 22936.918Jul 15
1989 (113 days)936.447936.353Oct 21936.507May 19
1988 (112 days)936.457936.344Oct 31936.520Jul 6
1987 (115 days)936.646936.473Nov 2936.771May 2
1986 (123 days)936.606936.422Mar 12936.711Aug 8
1985 (122 days)936.504936.384Nov 7936.612May 2
1984 (114 days)936.551936.404Nov 1936.660Jun 18
1983 (60 days)936.642936.468Mar 3936.751Aug 8
1982 (46 days)936.518936.254Mar 10936.667Jul 29
1981 (92 days)936.365936.203Mar 31936.499Jul 31
1980 (93 days)936.267936.132Apr 11936.371Aug 1
1979 (70 days)936.310936.124Nov 1936.400Jun 9
1978 (64 days)936.387936.260Oct 21936.458Jun 7
1977 (56 days)936.403936.318Oct 24936.464May 31
1976 (61 days)936.511936.306Oct 27936.596May 29
1975 (69 days)936.661936.464Oct 28936.785May 19
1974 (74 days)936.704936.547Feb 25936.797Jul 11
1973 (76 days)936.657936.483Nov 5936.687Jul 9
1972 (12 days)936.553936.452Mar 16936.666Jul 11
1971 (41 days)936.587936.370Nov 3936.663Jul 14
1970 (10 days)936.437936.327Nov 5936.577Jul 9
1969 (7 days)936.458936.382Oct 28936.565May 14
1968 (7 days)936.387936.330Nov 4936.440Oct 1
1967 (9 days)936.517936.309Nov 7936.647Jun 28
1966 (5 days)936.555936.498Oct 13936.589Jun 8
1965 (6 days)936.423936.297May 4936.544Aug 18
1964 (7 days)936.148936.050Oct 29936.211May 28
1963 (5 days)936.143936.083Aug 14936.245May 17
1962 (4 days)936.316936.257Sep 18936.361Aug 7
1961 (4 days)936.468936.388Jul 25936.614Mar 29
1960 (7 days)936.591936.486Oct 11936.669Jul 12
1959 (6 days)936.568936.483Oct 29936.614Aug 24
1958 (6 days)936.697936.532Oct 17936.791Jul 29
1957 (7 days)936.804936.656Nov 20936.888May 23
1956 (6 days)936.922936.797Oct 29937.013Aug 8
1955 (4 days)937.134936.943Oct 7937.248Jul 6
1940 (1 days)936.282936.282May 21936.282May 21
1939 (2 days)936.106936.007Sep 8936.205Jun 29
1930 (5 days)936.530936.468Sep 30936.574Jun 5
1929 (3 days)936.692936.535Oct 9936.845Jun 20
1928 (3 days)937.031936.952Sep 26937.135Jul 25
1927 (2 days)937.140937.132Jun 17937.147Aug 9
1926 (3 days)936.700936.675May 13936.748Jun 22
1925 (2 days)936.553936.538Aug 25936.568May 15
1924 (4 days)936.590936.580Jun 25936.605May 8
1923 (2 days)936.673936.647Jun 19936.699Nov 23
1922 (9 days)936.597936.535May 24936.647Aug 15
1921 (10 days)936.776936.602Apr 7936.873Jun 11
1920 (15 days)936.761936.553Nov 22936.940Jun 15
1919 (16 days)936.711936.532Oct 27936.833May 31
1918 (3 days)936.743936.714Oct 28936.800Oct 1

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

Monthly averages

MonthAverageLowestHighest
January936.644936.644936.644
February936.519936.259936.713
March936.524936.136936.966
April936.618936.129937.000
May936.722936.126937.142
June936.760936.190937.213
July936.790936.175937.248
August936.766936.083937.229
September936.692936.007937.203
October936.616936.005937.074
November936.558936.124936.908

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Daily levels as CSV (7,713 rows; credit the original agencies listed below)