Country: Canada
United StatesCanadaUnited Kingdom

Huff Lake water level history

Daily records since 1940 · Level today: 815.557 m

Highest on record
816.383 m
Mar 26, 1997
Lowest on record
810.665 m
Sep 7, 1959
Today
815.557 m
Oct 23, 2026
Years of data
87
since 1940

In short

Across 5 complete years, 2022 had the lowest average level (814.526 m) and 2025 the highest (815.264 m).

On average the lake is lowest in September (814.065 m) and highest in May (815.321 m).

Huff Lake level, all years

Loading chart…

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

Each year's lowest and highest level

8108128148158171940195119621973198419952006201720261940: lowest 812.74 m (1940-09-30), highest 814.33 m (1940-06-17), average 813.53 m, 53 days measured1941: lowest 810.73 m (1941-08-26), highest 814.71 m (1941-03-26), average 812.70 m, 49 days measured1942: lowest 811.84 m (1942-03-07), highest 813.87 m (1942-06-14), average 813.49 m, 40 days measured1943: lowest 810.96 m (1943-07-31), highest 814.31 m (1943-03-26), average 813.31 m, 39 days measured1944: lowest 810.73 m (1944-10-17), highest 814.22 m (1944-04-08), average 813.42 m, 46 days measured1945: lowest 810.90 m (1945-09-28), highest 814.31 m (1945-06-27), average 812.71 m, 43 days measured1946: lowest 811.57 m (1946-10-17), highest 814.28 m (1946-03-31), average 813.43 m, 68 days measured1947: lowest 812.52 m (1947-02-28), highest 814.44 m (1947-06-30), average 814.03 m, 114 days measured1948: lowest 812.48 m (1948-02-29), highest 814.52 m (1948-04-26), average 814.03 m, 104 days measured1949: lowest 810.71 m (1949-08-27), highest 814.39 m (1949-04-18), average 812.72 m, 59 days measured1950: lowest 811.57 m (1950-04-07), highest 814.55 m (1950-05-22), average 813.80 m, 127 days measured1951: lowest 811.11 m (1951-09-18), highest 814.66 m (1951-07-02), average 813.86 m, 129 days measured1952: lowest 810.76 m (1952-09-27), highest 815.37 m (1952-04-18), average 813.81 m, 85 days measured1953: lowest 813.36 m (1953-04-10), highest 814.85 m (1953-05-29), average 814.09 m, 250 days measured1954: lowest 812.09 m (1954-08-26), highest 814.76 m (1954-06-16), average 814.03 m, 264 days measured1955: lowest 813.14 m (1955-02-25), highest 814.87 m (1955-07-12), average 813.91 m, 247 days measured1956: lowest 813.07 m (1956-02-26), highest 814.38 m (1956-06-10), average 813.81 m, 249 days measured1957: lowest 813.04 m (1957-02-25), highest 814.40 m (1957-05-10), average 813.90 m, 249 days measured1958: lowest 813.07 m (1958-07-27), highest 814.61 m (1958-05-11), average 813.70 m, 249 days measured1959: lowest 810.67 m (1959-09-07), highest 814.62 m (1959-04-22), average 812.35 m, 247 days measured1960: lowest 811.52 m (1960-09-27), highest 814.66 m (1960-04-07), average 813.34 m, 247 days measured1961: lowest 811.73 m (1961-10-18), highest 815.94 m (1961-05-15), average 813.68 m, 249 days measured1962: lowest 812.97 m (1962-02-26), highest 816.11 m (1962-07-15), average 815.36 m, 136 days measured1963: lowest 812.04 m (1963-10-17), highest 816.10 m (1963-03-30), average 815.27 m, 203 days measured1964: lowest 812.54 m (1964-02-25), highest 816.08 m (1964-04-22), average 814.37 m, 118 days measured1965: lowest 812.47 m (1965-02-25), highest 816.26 m (1965-04-22), average 815.31 m, 96 days measured1966: lowest 812.11 m (1966-11-03), highest 816.20 m (1966-03-16), average 815.33 m, 171 days measured1967: lowest 812.05 m (1967-02-28), highest 816.11 m (1967-05-16), average 814.73 m, 201 days measured1968: lowest 812.13 m (1968-08-19), highest 816.05 m (1968-03-08), average 814.70 m, 252 days measured1969: lowest 814.00 m (1969-09-05), highest 816.12 m (1969-04-07), average 815.03 m, 250 days measured1970: lowest 814.89 m (1970-08-21), highest 816.12 m (1970-04-05), average 815.50 m, 252 days measured1971: lowest 811.75 m (1971-09-02), highest 816.11 m (1971-04-18), average 814.69 m, 226 days measured1972: lowest 811.79 m (1972-02-27), highest 816.14 m (1972-04-16), average 815.12 m, 225 days measured1973: lowest 813.64 m (1973-10-01), highest 815.95 m (1973-05-04), average 814.88 m, 241 days measured1974: lowest 814.09 m (1974-08-09), highest 816.15 m (1974-05-20), average 815.30 m, 243 days measured1975: lowest 814.10 m (1975-03-16), highest 815.96 m (1975-06-30), average 815.12 m, 248 days measured1976: lowest 814.49 m (1976-08-11), highest 816.04 m (1976-03-19), average 815.26 m, 245 days measured1977: lowest 813.00 m (1977-02-25), highest 815.88 m (1977-05-03), average 814.58 m, 251 days measured1978: lowest 811.90 m (1978-02-25), highest 815.94 m (1978-05-03), average 814.93 m, 251 days measured1979: lowest 813.66 m (1979-03-12), highest 816.10 m (1979-04-18), average 814.99 m, 254 days measured1980: lowest 813.20 m (1980-03-18), highest 815.92 m (1980-06-27), average 814.57 m, 249 days measured1981: lowest 813.70 m (1981-10-27), highest 815.85 m (1981-02-28), average 814.83 m, 252 days measured1982: lowest 813.04 m (1982-02-24), highest 816.08 m (1982-04-14), average 815.25 m, 250 days measured1983: lowest 814.95 m (1983-11-03), highest 815.91 m (1983-05-16), average 815.44 m, 253 days measured1984: lowest 811.40 m (1984-10-26), highest 815.76 m (1984-04-16), average 813.44 m, 255 days measured1985: lowest 811.42 m (1985-03-08), highest 815.87 m (1985-04-24), average 813.50 m, 198 days measured1986: lowest 812.89 m (1986-09-04), highest 816.04 m (1986-05-24), average 814.71 m, 278 days measured1987: lowest 812.16 m (1987-10-20), highest 815.94 m (1987-04-05), average 814.55 m, 264 days measured1988: lowest 812.99 m (1988-10-31), highest 815.86 m (1988-04-12), average 813.99 m, 249 days measured1989: lowest 811.86 m (1989-02-23), highest 815.74 m (1989-05-07), average 813.03 m, 256 days measured1990: lowest 812.51 m (1990-08-08), highest 815.89 m (1990-03-26), average 814.25 m, 249 days measured1991: lowest 812.23 m (1991-02-10), highest 816.03 m (1991-06-30), average 814.84 m, 267 days measured1992: lowest 813.06 m (1992-05-31), highest 815.85 m (1992-03-20), average 814.69 m, 279 days measured1993: lowest 813.69 m (1993-06-03), highest 815.93 m (1993-08-19), average 815.16 m, 275 days measured1994: lowest 813.51 m (1994-09-27), highest 815.92 m (1994-03-22), average 814.93 m, 252 days measured1995: lowest 813.93 m (1995-08-18), highest 815.84 m (1995-04-19), average 815.11 m, 253 days measured1996: lowest 813.92 m (1996-08-06), highest 816.14 m (1996-03-16), average 815.27 m, 256 days measured1997: lowest 813.61 m (1997-02-24), highest 816.38 m (1997-03-26), average 814.94 m, 271 days measured1998: lowest 814.06 m (1998-06-06), highest 815.78 m (1998-04-06), average 814.91 m, 253 days measured1999: lowest 813.70 m (1999-08-28), highest 815.85 m (1999-05-19), average 815.03 m, 254 days measured2000: lowest 814.28 m (2000-09-20), highest 815.98 m (2000-07-04), average 815.17 m, 254 days measured2001: lowest 811.40 m (2001-07-12), highest 815.87 m (2001-04-18), average 813.81 m, 189 days measured2002: lowest 812.02 m (2002-04-12), highest 816.14 m (2002-08-10), average 815.58 m, 209 days measured2003: lowest 812.79 m (2003-09-29), highest 815.93 m (2003-03-26), average 814.61 m, 262 days measured2004: lowest 813.66 m (2004-03-05), highest 816.10 m (2004-05-24), average 815.15 m, 261 days measured2005: lowest 813.37 m (2005-08-20), highest 815.96 m (2005-06-23), average 815.27 m, 276 days measured2006: lowest 812.77 m (2006-10-24), highest 815.93 m (2006-03-29), average 814.31 m, 254 days measured2007: lowest 812.20 m (2007-10-16), highest 816.01 m (2007-03-27), average 814.42 m, 256 days measured2008: lowest 813.07 m (2008-08-29), highest 815.86 m (2008-07-05), average 814.74 m, 256 days measured2009: lowest 813.38 m (2009-03-18), highest 815.86 m (2009-05-10), average 814.79 m, 263 days measured2010: lowest 814.28 m (2010-03-01), highest 815.92 m (2010-05-16), average 815.46 m, 248 days measured2011: lowest 814.08 m (2011-04-17), highest 815.86 m (2011-05-20), average 815.38 m, 245 days measured2012: lowest 814.07 m (2012-08-28), highest 815.88 m (2012-05-05), average 815.28 m, 245 days measured2013: lowest 815.29 m (2013-03-01), highest 815.89 m (2013-05-17), average 815.67 m, 245 days measured2014: lowest 813.35 m (2014-10-01), highest 816.11 m (2014-06-18), average 815.51 m, 245 days measured2015: lowest 814.61 m (2015-03-16), highest 815.91 m (2015-04-29), average 815.60 m, 245 days measured2016: lowest 812.54 m (2016-09-18), highest 815.90 m (2016-05-13), average 815.42 m, 241 days measured2017: lowest 814.65 m (2017-03-25), highest 815.90 m (2017-05-18), average 815.26 m, 255 days measured2018: lowest 813.55 m (2018-10-28), highest 815.83 m (2018-05-09), average 815.00 m, 255 days measured2019: lowest 815.02 m (2019-03-15), highest 815.91 m (2019-05-09), average 815.44 m, 254 days measured2020: lowest 812.99 m (2020-12-07), highest 815.79 m (2020-05-07), average 814.74 m, 310 days measured2021: lowest 814.16 m (2021-01-01), highest 815.74 m (2021-05-01), average 815.20 m, 365 days measured2022: lowest 812.68 m (2022-11-10), highest 815.77 m (2022-05-11), average 814.53 m, 358 days measured2023: lowest 813.20 m (2023-02-16), highest 815.88 m (2023-05-09), average 814.88 m, 365 days measured2024: lowest 814.76 m (2024-10-21), highest 815.76 m (2024-05-14), average 815.25 m, 366 days measured2025: lowest 814.53 m (2025-06-12), highest 815.83 m (2025-05-11), average 815.26 m, 365 days measured2026: lowest 815.22 m (2026-01-10), highest 815.70 m (2026-03-09), average 815.46 m, 112 days measured
810812814815817194019621984200620261940: lowest 812.74 m (1940-09-30), highest 814.33 m (1940-06-17), average 813.53 m, 53 days measured1941: lowest 810.73 m (1941-08-26), highest 814.71 m (1941-03-26), average 812.70 m, 49 days measured1942: lowest 811.84 m (1942-03-07), highest 813.87 m (1942-06-14), average 813.49 m, 40 days measured1943: lowest 810.96 m (1943-07-31), highest 814.31 m (1943-03-26), average 813.31 m, 39 days measured1944: lowest 810.73 m (1944-10-17), highest 814.22 m (1944-04-08), average 813.42 m, 46 days measured1945: lowest 810.90 m (1945-09-28), highest 814.31 m (1945-06-27), average 812.71 m, 43 days measured1946: lowest 811.57 m (1946-10-17), highest 814.28 m (1946-03-31), average 813.43 m, 68 days measured1947: lowest 812.52 m (1947-02-28), highest 814.44 m (1947-06-30), average 814.03 m, 114 days measured1948: lowest 812.48 m (1948-02-29), highest 814.52 m (1948-04-26), average 814.03 m, 104 days measured1949: lowest 810.71 m (1949-08-27), highest 814.39 m (1949-04-18), average 812.72 m, 59 days measured1950: lowest 811.57 m (1950-04-07), highest 814.55 m (1950-05-22), average 813.80 m, 127 days measured1951: lowest 811.11 m (1951-09-18), highest 814.66 m (1951-07-02), average 813.86 m, 129 days measured1952: lowest 810.76 m (1952-09-27), highest 815.37 m (1952-04-18), average 813.81 m, 85 days measured1953: lowest 813.36 m (1953-04-10), highest 814.85 m (1953-05-29), average 814.09 m, 250 days measured1954: lowest 812.09 m (1954-08-26), highest 814.76 m (1954-06-16), average 814.03 m, 264 days measured1955: lowest 813.14 m (1955-02-25), highest 814.87 m (1955-07-12), average 813.91 m, 247 days measured1956: lowest 813.07 m (1956-02-26), highest 814.38 m (1956-06-10), average 813.81 m, 249 days measured1957: lowest 813.04 m (1957-02-25), highest 814.40 m (1957-05-10), average 813.90 m, 249 days measured1958: lowest 813.07 m (1958-07-27), highest 814.61 m (1958-05-11), average 813.70 m, 249 days measured1959: lowest 810.67 m (1959-09-07), highest 814.62 m (1959-04-22), average 812.35 m, 247 days measured1960: lowest 811.52 m (1960-09-27), highest 814.66 m (1960-04-07), average 813.34 m, 247 days measured1961: lowest 811.73 m (1961-10-18), highest 815.94 m (1961-05-15), average 813.68 m, 249 days measured1962: lowest 812.97 m (1962-02-26), highest 816.11 m (1962-07-15), average 815.36 m, 136 days measured1963: lowest 812.04 m (1963-10-17), highest 816.10 m (1963-03-30), average 815.27 m, 203 days measured1964: lowest 812.54 m (1964-02-25), highest 816.08 m (1964-04-22), average 814.37 m, 118 days measured1965: lowest 812.47 m (1965-02-25), highest 816.26 m (1965-04-22), average 815.31 m, 96 days measured1966: lowest 812.11 m (1966-11-03), highest 816.20 m (1966-03-16), average 815.33 m, 171 days measured1967: lowest 812.05 m (1967-02-28), highest 816.11 m (1967-05-16), average 814.73 m, 201 days measured1968: lowest 812.13 m (1968-08-19), highest 816.05 m (1968-03-08), average 814.70 m, 252 days measured1969: lowest 814.00 m (1969-09-05), highest 816.12 m (1969-04-07), average 815.03 m, 250 days measured1970: lowest 814.89 m (1970-08-21), highest 816.12 m (1970-04-05), average 815.50 m, 252 days measured1971: lowest 811.75 m (1971-09-02), highest 816.11 m (1971-04-18), average 814.69 m, 226 days measured1972: lowest 811.79 m (1972-02-27), highest 816.14 m (1972-04-16), average 815.12 m, 225 days measured1973: lowest 813.64 m (1973-10-01), highest 815.95 m (1973-05-04), average 814.88 m, 241 days measured1974: lowest 814.09 m (1974-08-09), highest 816.15 m (1974-05-20), average 815.30 m, 243 days measured1975: lowest 814.10 m (1975-03-16), highest 815.96 m (1975-06-30), average 815.12 m, 248 days measured1976: lowest 814.49 m (1976-08-11), highest 816.04 m (1976-03-19), average 815.26 m, 245 days measured1977: lowest 813.00 m (1977-02-25), highest 815.88 m (1977-05-03), average 814.58 m, 251 days measured1978: lowest 811.90 m (1978-02-25), highest 815.94 m (1978-05-03), average 814.93 m, 251 days measured1979: lowest 813.66 m (1979-03-12), highest 816.10 m (1979-04-18), average 814.99 m, 254 days measured1980: lowest 813.20 m (1980-03-18), highest 815.92 m (1980-06-27), average 814.57 m, 249 days measured1981: lowest 813.70 m (1981-10-27), highest 815.85 m (1981-02-28), average 814.83 m, 252 days measured1982: lowest 813.04 m (1982-02-24), highest 816.08 m (1982-04-14), average 815.25 m, 250 days measured1983: lowest 814.95 m (1983-11-03), highest 815.91 m (1983-05-16), average 815.44 m, 253 days measured1984: lowest 811.40 m (1984-10-26), highest 815.76 m (1984-04-16), average 813.44 m, 255 days measured1985: lowest 811.42 m (1985-03-08), highest 815.87 m (1985-04-24), average 813.50 m, 198 days measured1986: lowest 812.89 m (1986-09-04), highest 816.04 m (1986-05-24), average 814.71 m, 278 days measured1987: lowest 812.16 m (1987-10-20), highest 815.94 m (1987-04-05), average 814.55 m, 264 days measured1988: lowest 812.99 m (1988-10-31), highest 815.86 m (1988-04-12), average 813.99 m, 249 days measured1989: lowest 811.86 m (1989-02-23), highest 815.74 m (1989-05-07), average 813.03 m, 256 days measured1990: lowest 812.51 m (1990-08-08), highest 815.89 m (1990-03-26), average 814.25 m, 249 days measured1991: lowest 812.23 m (1991-02-10), highest 816.03 m (1991-06-30), average 814.84 m, 267 days measured1992: lowest 813.06 m (1992-05-31), highest 815.85 m (1992-03-20), average 814.69 m, 279 days measured1993: lowest 813.69 m (1993-06-03), highest 815.93 m (1993-08-19), average 815.16 m, 275 days measured1994: lowest 813.51 m (1994-09-27), highest 815.92 m (1994-03-22), average 814.93 m, 252 days measured1995: lowest 813.93 m (1995-08-18), highest 815.84 m (1995-04-19), average 815.11 m, 253 days measured1996: lowest 813.92 m (1996-08-06), highest 816.14 m (1996-03-16), average 815.27 m, 256 days measured1997: lowest 813.61 m (1997-02-24), highest 816.38 m (1997-03-26), average 814.94 m, 271 days measured1998: lowest 814.06 m (1998-06-06), highest 815.78 m (1998-04-06), average 814.91 m, 253 days measured1999: lowest 813.70 m (1999-08-28), highest 815.85 m (1999-05-19), average 815.03 m, 254 days measured2000: lowest 814.28 m (2000-09-20), highest 815.98 m (2000-07-04), average 815.17 m, 254 days measured2001: lowest 811.40 m (2001-07-12), highest 815.87 m (2001-04-18), average 813.81 m, 189 days measured2002: lowest 812.02 m (2002-04-12), highest 816.14 m (2002-08-10), average 815.58 m, 209 days measured2003: lowest 812.79 m (2003-09-29), highest 815.93 m (2003-03-26), average 814.61 m, 262 days measured2004: lowest 813.66 m (2004-03-05), highest 816.10 m (2004-05-24), average 815.15 m, 261 days measured2005: lowest 813.37 m (2005-08-20), highest 815.96 m (2005-06-23), average 815.27 m, 276 days measured2006: lowest 812.77 m (2006-10-24), highest 815.93 m (2006-03-29), average 814.31 m, 254 days measured2007: lowest 812.20 m (2007-10-16), highest 816.01 m (2007-03-27), average 814.42 m, 256 days measured2008: lowest 813.07 m (2008-08-29), highest 815.86 m (2008-07-05), average 814.74 m, 256 days measured2009: lowest 813.38 m (2009-03-18), highest 815.86 m (2009-05-10), average 814.79 m, 263 days measured2010: lowest 814.28 m (2010-03-01), highest 815.92 m (2010-05-16), average 815.46 m, 248 days measured2011: lowest 814.08 m (2011-04-17), highest 815.86 m (2011-05-20), average 815.38 m, 245 days measured2012: lowest 814.07 m (2012-08-28), highest 815.88 m (2012-05-05), average 815.28 m, 245 days measured2013: lowest 815.29 m (2013-03-01), highest 815.89 m (2013-05-17), average 815.67 m, 245 days measured2014: lowest 813.35 m (2014-10-01), highest 816.11 m (2014-06-18), average 815.51 m, 245 days measured2015: lowest 814.61 m (2015-03-16), highest 815.91 m (2015-04-29), average 815.60 m, 245 days measured2016: lowest 812.54 m (2016-09-18), highest 815.90 m (2016-05-13), average 815.42 m, 241 days measured2017: lowest 814.65 m (2017-03-25), highest 815.90 m (2017-05-18), average 815.26 m, 255 days measured2018: lowest 813.55 m (2018-10-28), highest 815.83 m (2018-05-09), average 815.00 m, 255 days measured2019: lowest 815.02 m (2019-03-15), highest 815.91 m (2019-05-09), average 815.44 m, 254 days measured2020: lowest 812.99 m (2020-12-07), highest 815.79 m (2020-05-07), average 814.74 m, 310 days measured2021: lowest 814.16 m (2021-01-01), highest 815.74 m (2021-05-01), average 815.20 m, 365 days measured2022: lowest 812.68 m (2022-11-10), highest 815.77 m (2022-05-11), average 814.53 m, 358 days measured2023: lowest 813.20 m (2023-02-16), highest 815.88 m (2023-05-09), average 814.88 m, 365 days measured2024: lowest 814.76 m (2024-10-21), highest 815.76 m (2024-05-14), average 815.25 m, 366 days measured2025: lowest 814.53 m (2025-06-12), highest 815.83 m (2025-05-11), average 815.26 m, 365 days measured2026: lowest 815.22 m (2026-01-10), highest 815.70 m (2026-03-09), average 815.46 m, 112 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.

  • 2022812.682 m on Nov 10
  • 2023813.202 m on Feb 16
  • 2021814.160 m on Jan 1
  • 2025814.525 m on Jun 12
  • 2024814.756 m on Oct 21

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (112 days)815.460815.215Jan 10815.700Mar 9
2025815.264814.525Jun 12815.834May 11
2024815.253814.756Oct 21815.759May 14
2023814.880813.202Feb 16815.881May 9
2022814.526812.682Nov 10815.766May 11
2021815.201814.160Jan 1815.741May 1
2020 (310 days)814.739812.989Dec 7815.793May 7
2019 (254 days)815.437815.018Mar 15815.912May 9
2018 (255 days)815.002813.549Oct 28815.831May 9
2017 (255 days)815.261814.652Mar 25815.901May 18
2016 (241 days)815.420812.537Sep 18815.898May 13
2015 (245 days)815.600814.612Mar 16815.913Apr 29
2014 (245 days)815.507813.346Oct 1816.111Jun 18
2013 (245 days)815.670815.287Mar 1815.892May 17
2012 (245 days)815.275814.068Aug 28815.883May 5
2011 (245 days)815.384814.082Apr 17815.860May 20
2010 (248 days)815.460814.280Mar 1815.922May 16
2009 (263 days)814.788813.379Mar 18815.860May 10
2008 (256 days)814.742813.068Aug 29815.856Jul 5
2007 (256 days)814.423812.195Oct 16816.006Mar 27
2006 (254 days)814.313812.766Oct 24815.930Mar 29
2005 (276 days)815.269813.370Aug 20815.956Jun 23
2004 (261 days)815.148813.661Mar 5816.104May 24
2003 (262 days)814.608812.789Sep 29815.925Mar 26
2002 (209 days)815.583812.018Apr 12816.138Aug 10
2001 (189 days)813.814811.400Jul 12815.874Apr 18
2000 (254 days)815.169814.284Sep 20815.978Jul 4
1999 (254 days)815.030813.695Aug 28815.854May 19
1998 (253 days)814.906814.061Jun 6815.777Apr 6
1997 (271 days)814.943813.611Feb 24816.383Mar 26
1996 (256 days)815.269813.918Aug 6816.140Mar 16
1995 (253 days)815.113813.930Aug 18815.842Apr 19
1994 (252 days)814.926813.513Sep 27815.919Mar 22
1993 (275 days)815.157813.685Jun 3815.931Aug 19
1992 (279 days)814.686813.063May 31815.852Mar 20
1991 (267 days)814.841812.232Feb 10816.030Jun 30
1990 (249 days)814.245812.505Aug 8815.894Mar 26
1989 (256 days)813.027811.860Feb 23815.744May 7
1988 (249 days)813.988812.990Oct 31815.855Apr 12
1987 (264 days)814.551812.162Oct 20815.942Apr 5
1986 (278 days)814.705812.886Sep 4816.041May 24
1985 (198 days)813.499811.420Mar 8815.868Apr 24
1984 (255 days)813.435811.400Oct 26815.760Apr 16
1983 (253 days)815.442814.948Nov 3815.907May 16
1982 (250 days)815.249813.035Feb 24816.076Apr 14
1981 (252 days)814.832813.701Oct 27815.854Feb 28
1980 (249 days)814.570813.202Mar 18815.915Jun 27
1979 (254 days)814.991813.664Mar 12816.097Apr 18
1978 (251 days)814.928811.899Feb 25815.943May 3
1977 (251 days)814.578812.996Feb 25815.879May 3
1976 (245 days)815.262814.490Aug 11816.044Mar 19
1975 (248 days)815.118814.103Mar 16815.956Jun 30
1974 (243 days)815.304814.087Aug 9816.151May 20
1973 (241 days)814.879813.639Oct 1815.947May 4
1972 (225 days)815.124811.792Feb 27816.136Apr 16
1971 (226 days)814.686811.746Sep 2816.105Apr 18
1970 (252 days)815.500814.892Aug 21816.120Apr 5
1969 (250 days)815.034813.996Sep 5816.123Apr 7
1968 (252 days)814.703812.127Aug 19816.047Mar 8
1967 (201 days)814.730812.051Feb 28816.111May 16
1966 (171 days)815.329812.112Nov 3816.196Mar 16
1965 (96 days)815.310812.472Feb 25816.257Apr 22
1964 (118 days)814.368812.536Feb 25816.075Apr 22
1963 (203 days)815.269812.036Oct 17816.096Mar 30
1962 (136 days)815.364812.966Feb 26816.111Jul 15
1961 (249 days)813.684811.725Oct 18815.937May 15
1960 (247 days)813.340811.518Sep 27814.660Apr 7
1959 (247 days)812.348810.665Sep 7814.621Apr 22
1958 (249 days)813.703813.072Jul 27814.606May 11
1957 (249 days)813.898813.042Feb 25814.404May 10
1956 (249 days)813.810813.072Feb 26814.383Jun 10
1955 (247 days)813.907813.139Feb 25814.865Jul 12
1954 (264 days)814.027812.085Aug 26814.764Jun 16
1953 (250 days)814.089813.359Apr 10814.852May 29
1952 (85 days)813.811810.759Sep 27815.367Apr 18
1951 (129 days)813.859811.109Sep 18814.663Jul 2
1950 (127 days)813.804811.566Apr 7814.553May 22
1949 (59 days)812.720810.707Aug 27814.386Apr 18
1948 (104 days)814.033812.481Feb 29814.523Apr 26
1947 (114 days)814.031812.520Feb 28814.444Jun 30
1946 (68 days)813.434811.566Oct 17814.279Mar 31
1945 (43 days)812.707810.902Sep 28814.309Jun 27
1944 (46 days)813.418810.731Oct 17814.218Apr 8
1943 (39 days)813.306810.957Jul 31814.309Mar 26
1942 (40 days)813.489811.841Mar 7813.867Jun 14
1941 (49 days)812.702810.728Aug 26814.706Mar 26
1940 (53 days)813.534812.740Sep 30814.325Jun 17

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

Monthly averages

MonthAverageLowestHighest
January814.803813.241815.401
February814.506811.119815.930
March814.694811.192816.383
April815.271811.566816.257
May815.321812.837816.151
June814.930812.237816.111
July814.918810.829816.111
August814.235810.668816.138
September814.065810.665815.898
October814.186810.731815.836
November814.578811.871815.836
December814.687812.989815.405

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Daily levels as CSV (19,382 rows; credit the original agencies listed below)