Country: Canada
United StatesCanadaUnited Kingdom

Newton Lake water level history

Daily records since 1937 · Level today: 802.635 m

Highest on record
804.257 m
May 23, 1974
Lowest on record
797.777 m
Oct 31, 1937
Today
802.635 m
Oct 23, 2026
Years of data
90
since 1937

In short

Across 5 complete years, 2021 had the lowest average level (802.373 m) and 2023 the highest (802.730 m).

On average the lake is lowest in October (801.482 m) and highest in May (802.886 m).

Newton Lake level, all years

Loading chart…

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

Each year's lowest and highest level

7977998018038051937194819591970198119922003201420261937: lowest 797.78 m (1937-10-31), highest 801.66 m (1937-05-04), average 800.93 m, 95 days measured1938: lowest 797.78 m (1938-02-28), highest 802.53 m (1938-07-12), average 802.12 m, 161 days measured1939: lowest 800.40 m (1939-02-28), highest 802.94 m (1939-06-17), average 801.84 m, 227 days measured1940: lowest 800.22 m (1940-02-29), highest 803.02 m (1940-06-09), average 801.92 m, 187 days measured1941: lowest 799.38 m (1941-03-17), highest 802.65 m (1941-04-02), average 801.54 m, 66 days measured1942: lowest 801.32 m (1942-02-28), highest 802.55 m (1942-07-01), average 801.96 m, 75 days measured1943: lowest 800.41 m (1943-09-24), highest 802.62 m (1943-04-21), average 801.36 m, 40 days measured1944: lowest 800.52 m (1944-03-31), highest 802.72 m (1944-04-09), average 802.02 m, 60 days measured1945: lowest 800.57 m (1945-02-28), highest 802.59 m (1945-04-27), average 801.74 m, 62 days measured1946: lowest 798.33 m (1946-10-31), highest 802.62 m (1946-04-22), average 801.46 m, 74 days measured1947: lowest 798.33 m (1947-02-28), highest 802.90 m (1947-04-18), average 801.94 m, 147 days measured1948: lowest 800.16 m (1948-02-29), highest 802.82 m (1948-05-17), average 801.83 m, 184 days measured1949: lowest 799.79 m (1949-03-21), highest 801.90 m (1949-04-24), average 800.56 m, 137 days measured1950: lowest 798.45 m (1950-04-13), highest 802.79 m (1950-05-21), average 801.80 m, 133 days measured1951: lowest 800.52 m (1951-03-31), highest 803.20 m (1951-05-23), average 802.14 m, 164 days measured1952: lowest 800.58 m (1952-10-17), highest 804.05 m (1952-04-19), average 801.76 m, 247 days measured1953: lowest 800.67 m (1953-03-06), highest 803.37 m (1953-05-31), average 802.29 m, 250 days measured1954: lowest 800.51 m (1954-02-10), highest 803.38 m (1954-05-17), average 802.53 m, 265 days measured1955: lowest 802.27 m (1955-03-05), highest 803.71 m (1955-04-10), average 802.89 m, 250 days measured1956: lowest 800.62 m (1956-03-07), highest 803.00 m (1956-05-14), average 801.77 m, 249 days measured1957: lowest 800.38 m (1957-09-27), highest 803.20 m (1957-04-27), average 801.59 m, 249 days measured1958: lowest 800.42 m (1958-10-31), highest 803.42 m (1958-04-24), average 801.90 m, 249 days measured1959: lowest 799.84 m (1959-03-01), highest 803.41 m (1959-04-05), average 801.92 m, 250 days measured1960: lowest 799.66 m (1960-10-31), highest 803.37 m (1960-05-07), average 801.72 m, 247 days measured1961: lowest 799.33 m (1961-10-31), highest 802.58 m (1961-03-30), average 800.94 m, 248 days measured1962: lowest 799.01 m (1962-02-26), highest 803.33 m (1962-04-23), average 802.21 m, 96 days measured1963: lowest 801.70 m (1963-09-20), highest 803.45 m (1963-04-15), average 802.69 m, 73 days measured1964: lowest 799.84 m (1964-11-02), highest 802.02 m (1964-04-27), average 801.18 m, 89 days measured1965: lowest 799.54 m (1965-04-10), highest 803.63 m (1965-04-23), average 802.55 m, 75 days measured1966: lowest 801.84 m (1966-08-23), highest 803.65 m (1966-03-26), average 802.56 m, 155 days measured1967: lowest 801.39 m (1967-09-08), highest 803.75 m (1967-05-27), average 802.27 m, 168 days measured1968: lowest 800.55 m (1968-09-24), highest 803.56 m (1968-03-28), average 801.95 m, 178 days measured1969: lowest 800.91 m (1969-11-02), highest 803.54 m (1969-05-02), average 802.05 m, 250 days measured1970: lowest 801.18 m (1970-03-18), highest 803.64 m (1970-05-11), average 802.66 m, 252 days measured1971: lowest 799.23 m (1971-10-07), highest 803.73 m (1971-04-28), average 801.73 m, 156 days measured1972: lowest 799.82 m (1972-03-10), highest 803.64 m (1972-03-31), average 801.95 m, 247 days measured1973: lowest 799.46 m (1973-11-05), highest 803.49 m (1973-05-15), average 801.21 m, 253 days measured1974: lowest 800.38 m (1974-02-25), highest 804.26 m (1974-05-23), average 802.12 m, 243 days measured1975: lowest 800.90 m (1975-03-15), highest 803.72 m (1975-05-07), average 802.30 m, 249 days measured1976: lowest 800.86 m (1976-10-15), highest 803.63 m (1976-03-21), average 802.15 m, 245 days measured1977: lowest 799.96 m (1977-11-02), highest 802.69 m (1977-04-24), average 800.95 m, 251 days measured1978: lowest 799.89 m (1978-03-24), highest 803.55 m (1978-04-18), average 802.22 m, 253 days measured1979: lowest 801.64 m (1979-03-09), highest 803.65 m (1979-04-18), average 802.54 m, 254 days measured1980: lowest 799.82 m (1980-09-04), highest 803.33 m (1980-04-21), average 801.42 m, 250 days measured1981: lowest 799.43 m (1981-07-15), highest 802.65 m (1981-04-16), average 800.80 m, 252 days measured1982: lowest 799.64 m (1982-02-25), highest 803.69 m (1982-04-16), average 802.51 m, 249 days measured1983: lowest 800.91 m (1983-10-22), highest 803.53 m (1983-05-16), average 802.17 m, 252 days measured1984: lowest 798.52 m (1984-08-09), highest 801.88 m (1984-04-25), average 800.64 m, 172 days measured1985: lowest 798.93 m (1985-03-24), highest 803.63 m (1985-04-18), average 800.42 m, 222 days measured1986: lowest 799.74 m (1986-02-26), highest 803.66 m (1986-05-25), average 802.77 m, 253 days measured1987: lowest 801.75 m (1987-09-08), highest 803.69 m (1987-04-10), average 802.63 m, 264 days measured1988: lowest 799.00 m (1988-10-31), highest 802.66 m (1988-05-01), average 800.71 m, 249 days measured1989: lowest 798.54 m (1989-11-02), highest 800.52 m (1989-05-29), average 799.41 m, 256 days measured1990: lowest 798.54 m (1990-08-22), highest 803.09 m (1990-04-26), average 801.25 m, 179 days measured1991: lowest 798.80 m (1991-03-11), highest 803.58 m (1991-06-30), average 802.45 m, 235 days measured1992: lowest 799.18 m (1992-09-16), highest 802.83 m (1992-04-18), average 800.95 m, 279 days measured1993: lowest 800.15 m (1993-02-11), highest 803.66 m (1993-04-07), average 802.49 m, 275 days measured1994: lowest 801.91 m (1994-11-01), highest 803.67 m (1994-03-15), average 802.85 m, 252 days measured1995: lowest 800.33 m (1995-07-31), highest 803.05 m (1995-05-09), average 801.32 m, 253 days measured1996: lowest 801.45 m (1996-02-20), highest 803.86 m (1996-04-20), average 802.89 m, 256 days measured1997: lowest 802.15 m (1997-11-03), highest 803.68 m (1997-03-31), average 802.92 m, 271 days measured1998: lowest 799.79 m (1998-06-21), highest 802.38 m (1998-04-25), average 801.13 m, 253 days measured1999: lowest 800.60 m (1999-02-28), highest 803.65 m (1999-04-05), average 802.52 m, 254 days measured2000: lowest 800.25 m (2000-07-02), highest 802.73 m (2000-07-19), average 801.95 m, 256 days measured2001: lowest 798.52 m (2001-08-27), highest 802.35 m (2001-05-06), average 800.80 m, 189 days measured2002: lowest 798.64 m (2002-04-04), highest 803.70 m (2002-08-11), average 802.60 m, 217 days measured2003: lowest 801.34 m (2003-11-02), highest 803.79 m (2003-03-19), average 802.63 m, 262 days measured2004: lowest 801.43 m (2004-02-16), highest 803.89 m (2004-05-26), average 803.05 m, 260 days measured2005: lowest 801.48 m (2005-11-03), highest 803.94 m (2005-03-13), average 802.74 m, 256 days measured2006: lowest 801.22 m (2006-10-31), highest 803.81 m (2006-04-05), average 802.36 m, 254 days measured2007: lowest 800.61 m (2007-03-07), highest 803.63 m (2007-03-28), average 802.34 m, 253 days measured2008: lowest 800.49 m (2008-10-30), highest 802.45 m (2008-07-11), average 801.46 m, 256 days measured2009: lowest 799.79 m (2009-10-13), highest 803.41 m (2009-05-16), average 801.44 m, 264 days measured2010: lowest 800.53 m (2010-03-16), highest 803.46 m (2010-04-30), average 802.72 m, 248 days measured2011: lowest 800.96 m (2011-04-19), highest 803.42 m (2011-06-02), average 802.97 m, 245 days measured2012: lowest 801.96 m (2012-10-27), highest 803.41 m (2012-05-06), average 802.84 m, 245 days measured2013: lowest 802.91 m (2013-03-01), highest 803.58 m (2013-04-12), average 803.16 m, 245 days measured2014: lowest 802.73 m (2014-06-16), highest 803.70 m (2014-06-19), average 803.22 m, 245 days measured2015: lowest 802.16 m (2015-03-17), highest 803.56 m (2015-03-14), average 802.95 m, 245 days measured2016: lowest 802.71 m (2016-09-01), highest 803.49 m (2016-05-11), average 803.21 m, 245 days measured2017: lowest 801.63 m (2017-10-31), highest 803.57 m (2017-03-23), average 802.56 m, 255 days measured2018: lowest 801.10 m (2018-10-11), highest 803.32 m (2018-05-09), average 802.23 m, 255 days measured2019: lowest 802.48 m (2019-02-27), highest 803.35 m (2019-05-11), average 803.06 m, 252 days measured2020: lowest 802.26 m (2020-09-13), highest 803.29 m (2020-05-11), average 802.93 m, 310 days measured2021: lowest 801.29 m (2021-09-08), highest 803.28 m (2021-05-02), average 802.37 m, 365 days measured2022: lowest 801.47 m (2022-10-21), highest 803.30 m (2022-05-14), average 802.49 m, 365 days measured2023: lowest 802.10 m (2023-01-01), highest 803.29 m (2023-05-12), average 802.73 m, 365 days measured2024: lowest 801.98 m (2024-09-11), highest 803.31 m (2024-05-14), average 802.72 m, 366 days measured2025: lowest 802.42 m (2025-07-31), highest 803.29 m (2025-05-05), average 802.73 m, 365 days measured2026: lowest 802.62 m (2026-10-11), highest 802.72 m (2026-09-22), average 802.65 m, 30 days measured
797799801803805193719591981200320261937: lowest 797.78 m (1937-10-31), highest 801.66 m (1937-05-04), average 800.93 m, 95 days measured1938: lowest 797.78 m (1938-02-28), highest 802.53 m (1938-07-12), average 802.12 m, 161 days measured1939: lowest 800.40 m (1939-02-28), highest 802.94 m (1939-06-17), average 801.84 m, 227 days measured1940: lowest 800.22 m (1940-02-29), highest 803.02 m (1940-06-09), average 801.92 m, 187 days measured1941: lowest 799.38 m (1941-03-17), highest 802.65 m (1941-04-02), average 801.54 m, 66 days measured1942: lowest 801.32 m (1942-02-28), highest 802.55 m (1942-07-01), average 801.96 m, 75 days measured1943: lowest 800.41 m (1943-09-24), highest 802.62 m (1943-04-21), average 801.36 m, 40 days measured1944: lowest 800.52 m (1944-03-31), highest 802.72 m (1944-04-09), average 802.02 m, 60 days measured1945: lowest 800.57 m (1945-02-28), highest 802.59 m (1945-04-27), average 801.74 m, 62 days measured1946: lowest 798.33 m (1946-10-31), highest 802.62 m (1946-04-22), average 801.46 m, 74 days measured1947: lowest 798.33 m (1947-02-28), highest 802.90 m (1947-04-18), average 801.94 m, 147 days measured1948: lowest 800.16 m (1948-02-29), highest 802.82 m (1948-05-17), average 801.83 m, 184 days measured1949: lowest 799.79 m (1949-03-21), highest 801.90 m (1949-04-24), average 800.56 m, 137 days measured1950: lowest 798.45 m (1950-04-13), highest 802.79 m (1950-05-21), average 801.80 m, 133 days measured1951: lowest 800.52 m (1951-03-31), highest 803.20 m (1951-05-23), average 802.14 m, 164 days measured1952: lowest 800.58 m (1952-10-17), highest 804.05 m (1952-04-19), average 801.76 m, 247 days measured1953: lowest 800.67 m (1953-03-06), highest 803.37 m (1953-05-31), average 802.29 m, 250 days measured1954: lowest 800.51 m (1954-02-10), highest 803.38 m (1954-05-17), average 802.53 m, 265 days measured1955: lowest 802.27 m (1955-03-05), highest 803.71 m (1955-04-10), average 802.89 m, 250 days measured1956: lowest 800.62 m (1956-03-07), highest 803.00 m (1956-05-14), average 801.77 m, 249 days measured1957: lowest 800.38 m (1957-09-27), highest 803.20 m (1957-04-27), average 801.59 m, 249 days measured1958: lowest 800.42 m (1958-10-31), highest 803.42 m (1958-04-24), average 801.90 m, 249 days measured1959: lowest 799.84 m (1959-03-01), highest 803.41 m (1959-04-05), average 801.92 m, 250 days measured1960: lowest 799.66 m (1960-10-31), highest 803.37 m (1960-05-07), average 801.72 m, 247 days measured1961: lowest 799.33 m (1961-10-31), highest 802.58 m (1961-03-30), average 800.94 m, 248 days measured1962: lowest 799.01 m (1962-02-26), highest 803.33 m (1962-04-23), average 802.21 m, 96 days measured1963: lowest 801.70 m (1963-09-20), highest 803.45 m (1963-04-15), average 802.69 m, 73 days measured1964: lowest 799.84 m (1964-11-02), highest 802.02 m (1964-04-27), average 801.18 m, 89 days measured1965: lowest 799.54 m (1965-04-10), highest 803.63 m (1965-04-23), average 802.55 m, 75 days measured1966: lowest 801.84 m (1966-08-23), highest 803.65 m (1966-03-26), average 802.56 m, 155 days measured1967: lowest 801.39 m (1967-09-08), highest 803.75 m (1967-05-27), average 802.27 m, 168 days measured1968: lowest 800.55 m (1968-09-24), highest 803.56 m (1968-03-28), average 801.95 m, 178 days measured1969: lowest 800.91 m (1969-11-02), highest 803.54 m (1969-05-02), average 802.05 m, 250 days measured1970: lowest 801.18 m (1970-03-18), highest 803.64 m (1970-05-11), average 802.66 m, 252 days measured1971: lowest 799.23 m (1971-10-07), highest 803.73 m (1971-04-28), average 801.73 m, 156 days measured1972: lowest 799.82 m (1972-03-10), highest 803.64 m (1972-03-31), average 801.95 m, 247 days measured1973: lowest 799.46 m (1973-11-05), highest 803.49 m (1973-05-15), average 801.21 m, 253 days measured1974: lowest 800.38 m (1974-02-25), highest 804.26 m (1974-05-23), average 802.12 m, 243 days measured1975: lowest 800.90 m (1975-03-15), highest 803.72 m (1975-05-07), average 802.30 m, 249 days measured1976: lowest 800.86 m (1976-10-15), highest 803.63 m (1976-03-21), average 802.15 m, 245 days measured1977: lowest 799.96 m (1977-11-02), highest 802.69 m (1977-04-24), average 800.95 m, 251 days measured1978: lowest 799.89 m (1978-03-24), highest 803.55 m (1978-04-18), average 802.22 m, 253 days measured1979: lowest 801.64 m (1979-03-09), highest 803.65 m (1979-04-18), average 802.54 m, 254 days measured1980: lowest 799.82 m (1980-09-04), highest 803.33 m (1980-04-21), average 801.42 m, 250 days measured1981: lowest 799.43 m (1981-07-15), highest 802.65 m (1981-04-16), average 800.80 m, 252 days measured1982: lowest 799.64 m (1982-02-25), highest 803.69 m (1982-04-16), average 802.51 m, 249 days measured1983: lowest 800.91 m (1983-10-22), highest 803.53 m (1983-05-16), average 802.17 m, 252 days measured1984: lowest 798.52 m (1984-08-09), highest 801.88 m (1984-04-25), average 800.64 m, 172 days measured1985: lowest 798.93 m (1985-03-24), highest 803.63 m (1985-04-18), average 800.42 m, 222 days measured1986: lowest 799.74 m (1986-02-26), highest 803.66 m (1986-05-25), average 802.77 m, 253 days measured1987: lowest 801.75 m (1987-09-08), highest 803.69 m (1987-04-10), average 802.63 m, 264 days measured1988: lowest 799.00 m (1988-10-31), highest 802.66 m (1988-05-01), average 800.71 m, 249 days measured1989: lowest 798.54 m (1989-11-02), highest 800.52 m (1989-05-29), average 799.41 m, 256 days measured1990: lowest 798.54 m (1990-08-22), highest 803.09 m (1990-04-26), average 801.25 m, 179 days measured1991: lowest 798.80 m (1991-03-11), highest 803.58 m (1991-06-30), average 802.45 m, 235 days measured1992: lowest 799.18 m (1992-09-16), highest 802.83 m (1992-04-18), average 800.95 m, 279 days measured1993: lowest 800.15 m (1993-02-11), highest 803.66 m (1993-04-07), average 802.49 m, 275 days measured1994: lowest 801.91 m (1994-11-01), highest 803.67 m (1994-03-15), average 802.85 m, 252 days measured1995: lowest 800.33 m (1995-07-31), highest 803.05 m (1995-05-09), average 801.32 m, 253 days measured1996: lowest 801.45 m (1996-02-20), highest 803.86 m (1996-04-20), average 802.89 m, 256 days measured1997: lowest 802.15 m (1997-11-03), highest 803.68 m (1997-03-31), average 802.92 m, 271 days measured1998: lowest 799.79 m (1998-06-21), highest 802.38 m (1998-04-25), average 801.13 m, 253 days measured1999: lowest 800.60 m (1999-02-28), highest 803.65 m (1999-04-05), average 802.52 m, 254 days measured2000: lowest 800.25 m (2000-07-02), highest 802.73 m (2000-07-19), average 801.95 m, 256 days measured2001: lowest 798.52 m (2001-08-27), highest 802.35 m (2001-05-06), average 800.80 m, 189 days measured2002: lowest 798.64 m (2002-04-04), highest 803.70 m (2002-08-11), average 802.60 m, 217 days measured2003: lowest 801.34 m (2003-11-02), highest 803.79 m (2003-03-19), average 802.63 m, 262 days measured2004: lowest 801.43 m (2004-02-16), highest 803.89 m (2004-05-26), average 803.05 m, 260 days measured2005: lowest 801.48 m (2005-11-03), highest 803.94 m (2005-03-13), average 802.74 m, 256 days measured2006: lowest 801.22 m (2006-10-31), highest 803.81 m (2006-04-05), average 802.36 m, 254 days measured2007: lowest 800.61 m (2007-03-07), highest 803.63 m (2007-03-28), average 802.34 m, 253 days measured2008: lowest 800.49 m (2008-10-30), highest 802.45 m (2008-07-11), average 801.46 m, 256 days measured2009: lowest 799.79 m (2009-10-13), highest 803.41 m (2009-05-16), average 801.44 m, 264 days measured2010: lowest 800.53 m (2010-03-16), highest 803.46 m (2010-04-30), average 802.72 m, 248 days measured2011: lowest 800.96 m (2011-04-19), highest 803.42 m (2011-06-02), average 802.97 m, 245 days measured2012: lowest 801.96 m (2012-10-27), highest 803.41 m (2012-05-06), average 802.84 m, 245 days measured2013: lowest 802.91 m (2013-03-01), highest 803.58 m (2013-04-12), average 803.16 m, 245 days measured2014: lowest 802.73 m (2014-06-16), highest 803.70 m (2014-06-19), average 803.22 m, 245 days measured2015: lowest 802.16 m (2015-03-17), highest 803.56 m (2015-03-14), average 802.95 m, 245 days measured2016: lowest 802.71 m (2016-09-01), highest 803.49 m (2016-05-11), average 803.21 m, 245 days measured2017: lowest 801.63 m (2017-10-31), highest 803.57 m (2017-03-23), average 802.56 m, 255 days measured2018: lowest 801.10 m (2018-10-11), highest 803.32 m (2018-05-09), average 802.23 m, 255 days measured2019: lowest 802.48 m (2019-02-27), highest 803.35 m (2019-05-11), average 803.06 m, 252 days measured2020: lowest 802.26 m (2020-09-13), highest 803.29 m (2020-05-11), average 802.93 m, 310 days measured2021: lowest 801.29 m (2021-09-08), highest 803.28 m (2021-05-02), average 802.37 m, 365 days measured2022: lowest 801.47 m (2022-10-21), highest 803.30 m (2022-05-14), average 802.49 m, 365 days measured2023: lowest 802.10 m (2023-01-01), highest 803.29 m (2023-05-12), average 802.73 m, 365 days measured2024: lowest 801.98 m (2024-09-11), highest 803.31 m (2024-05-14), average 802.72 m, 366 days measured2025: lowest 802.42 m (2025-07-31), highest 803.29 m (2025-05-05), average 802.73 m, 365 days measured2026: lowest 802.62 m (2026-10-11), highest 802.72 m (2026-09-22), average 802.65 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.

  • 2021801.287 m on Sep 8
  • 2022801.468 m on Oct 21
  • 2024801.984 m on Sep 11
  • 2023802.096 m on Jan 1
  • 2025802.415 m on Jul 31

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)802.649802.618Oct 11802.717Sep 22
2025802.729802.415Jul 31803.293May 5
2024802.724801.984Sep 11803.310May 14
2023802.730802.096Jan 1803.286May 12
2022802.487801.468Oct 21803.300May 14
2021802.373801.287Sep 8803.280May 2
2020 (310 days)802.930802.257Sep 13803.287May 11
2019 (252 days)803.057802.477Feb 27803.354May 11
2018 (255 days)802.232801.103Oct 11803.322May 9
2017 (255 days)802.563801.631Oct 31803.566Mar 23
2016 (245 days)803.206802.711Sep 1803.492May 11
2015 (245 days)802.949802.155Mar 17803.559Mar 14
2014 (245 days)803.217802.729Jun 16803.703Jun 19
2013 (245 days)803.165802.910Mar 1803.578Apr 12
2012 (245 days)802.844801.963Oct 27803.412May 6
2011 (245 days)802.966800.963Apr 19803.415Jun 2
2010 (248 days)802.722800.529Mar 16803.456Apr 30
2009 (264 days)801.442799.788Oct 13803.409May 16
2008 (256 days)801.457800.490Oct 30802.452Jul 11
2007 (253 days)802.336800.612Mar 7803.632Mar 28
2006 (254 days)802.357801.220Oct 31803.807Apr 5
2005 (256 days)802.743801.480Nov 3803.936Mar 13
2004 (260 days)803.052801.434Feb 16803.892May 26
2003 (262 days)802.629801.336Nov 2803.789Mar 19
2002 (217 days)802.600798.640Apr 4803.695Aug 11
2001 (189 days)800.797798.521Aug 27802.350May 6
2000 (256 days)801.947800.245Jul 2802.727Jul 19
1999 (254 days)802.515800.597Feb 28803.654Apr 5
1998 (253 days)801.128799.785Jun 21802.378Apr 25
1997 (271 days)802.922802.145Nov 3803.678Mar 31
1996 (256 days)802.887801.450Feb 20803.859Apr 20
1995 (253 days)801.318800.334Jul 31803.045May 9
1994 (252 days)802.855801.906Nov 1803.671Mar 15
1993 (275 days)802.489800.145Feb 11803.655Apr 7
1992 (279 days)800.948799.176Sep 16802.828Apr 18
1991 (235 days)802.448798.800Mar 11803.578Jun 30
1990 (179 days)801.247798.540Aug 22803.093Apr 26
1989 (256 days)799.414798.540Nov 2800.515May 29
1988 (249 days)800.705799.001Oct 31802.660May 1
1987 (264 days)802.634801.747Sep 8803.694Apr 10
1986 (253 days)802.770799.739Feb 26803.664May 25
1985 (222 days)800.421798.930Mar 24803.627Apr 18
1984 (172 days)800.641798.522Aug 9801.879Apr 25
1983 (252 days)802.167800.912Oct 22803.528May 16
1982 (249 days)802.507799.638Feb 25803.687Apr 16
1981 (252 days)800.804799.434Jul 15802.648Apr 16
1980 (250 days)801.424799.824Sep 4803.328Apr 21
1979 (254 days)802.535801.642Mar 9803.650Apr 18
1978 (253 days)802.218799.890Mar 24803.550Apr 18
1977 (251 days)800.949799.963Nov 2802.688Apr 24
1976 (245 days)802.151800.862Oct 15803.632Mar 21
1975 (249 days)802.295800.898Mar 15803.718May 7
1974 (243 days)802.116800.383Feb 25804.257May 23
1973 (253 days)801.208799.463Nov 5803.486May 15
1972 (247 days)801.952799.822Mar 10803.635Mar 31
1971 (156 days)801.735799.234Oct 7803.727Apr 28
1970 (252 days)802.661801.176Mar 18803.639May 11
1969 (250 days)802.046800.905Nov 2803.541May 2
1968 (178 days)801.952800.551Sep 24803.557Mar 28
1967 (168 days)802.267801.389Sep 8803.746May 27
1966 (155 days)802.562801.844Aug 23803.654Mar 26
1965 (75 days)802.546799.542Apr 10803.630Apr 23
1964 (89 days)801.180799.841Nov 2802.017Apr 27
1963 (73 days)802.686801.697Sep 20803.450Apr 15
1962 (96 days)802.212799.012Feb 26803.331Apr 23
1961 (248 days)800.936799.329Oct 31802.578Mar 30
1960 (247 days)801.718799.655Oct 31803.370May 7
1959 (250 days)801.918799.844Mar 1803.407Apr 5
1958 (249 days)801.899800.420Oct 31803.416Apr 24
1957 (249 days)801.585800.380Sep 27803.200Apr 27
1956 (249 days)801.775800.621Mar 7802.996May 14
1955 (250 days)802.893802.270Mar 5803.706Apr 10
1954 (265 days)802.527800.508Feb 10803.380May 17
1953 (250 days)802.286800.670Mar 6803.367May 31
1952 (247 days)801.764800.582Oct 17804.050Apr 19
1951 (164 days)802.144800.521Mar 31803.203May 23
1950 (133 days)801.798798.448Apr 13802.791May 21
1949 (137 days)800.559799.786Mar 21801.901Apr 24
1948 (184 days)801.826800.155Feb 29802.822May 17
1947 (147 days)801.941798.326Feb 28802.898Apr 18
1946 (74 days)801.458798.326Oct 31802.624Apr 22
1945 (62 days)801.741800.566Feb 28802.593Apr 27
1944 (60 days)802.019800.521Mar 31802.715Apr 9
1943 (40 days)801.364800.405Sep 24802.624Apr 21
1942 (75 days)801.956801.319Feb 28802.548Jul 1
1941 (66 days)801.541799.378Mar 17802.654Apr 2
1940 (187 days)801.921800.216Feb 29803.020Jun 9
1939 (227 days)801.842800.399Feb 28802.944Jun 17
1938 (161 days)802.124797.777Feb 28802.526Jul 12
1937 (95 days)800.935797.777Oct 31801.664May 4

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

Monthly averages

MonthAverageLowestHighest
January802.489802.024802.927
February801.809797.777803.683
March801.906798.387803.936
April802.703798.448804.160
May802.886799.556804.257
June802.395799.578803.703
July802.163798.448803.675
August801.716798.082803.695
September801.577797.930803.463
October801.482797.777803.367
November801.902798.540803.195
December802.386799.690802.896

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Daily levels as CSV (19,842 rows; credit the original agencies listed below)