Conesus Lake water level history

Daily records since 1971 · Level today: 817.99 ft

Highest on record

822.49 ft

Jun 24, 1972

Lowest on record

816.12 ft

Dec 21, 1988

Today

817.99 ft

Oct 21, 2026

Years of data

since 1971

In short

Across 53 complete years, 1988 had the lowest average level (817.61 ft) and 1972 the highest (818.78 ft).

On average the lake is lowest in December (817.34 ft) and highest in April (818.87 ft).

Conesus Lake level, all years

Loading chart…

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

Lowest years

Years ranked by their lowest daily level.

1988816.12 ft on Dec 21
1989816.20 ft on Jan 1
1991816.31 ft on Nov 10
2001816.40 ft on Dec 13
2018816.41 ft on Dec 18

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (292 days)	818.28	816.91	Feb 17	819.51	Apr 1
2025	817.75	816.52	Dec 17	819.27	May 8
2024	818.32	817.10	Nov 20	819.26	Apr 4
2023	817.95	816.62	Nov 30	819.17	Mar 27
2022	817.81	816.75	Jan 31	819.03	Apr 21
2021	818.30	816.84	Nov 22	819.96	Oct 30
2020	818.09	816.62	Dec 16	819.06	Mar 4
2019	817.87	816.53	Mar 4	819.29	Jun 21
2018	818.20	816.41	Dec 18	819.20	Mar 30
2017	818.05	816.70	Nov 27	819.17	Nov 6
2016	817.69	816.55	Oct 16	818.91	Mar 11
2015	817.85	816.47	Jan 11	819.19	Jun 15
2014	817.87	816.46	Nov 25	819.85	May 17
2013	818.03	816.69	Jan 23	819.44	Apr 13
2012	817.86	816.57	Nov 30	819.07	Apr 26
2011	817.97	816.56	Jan 1	819.02	Apr 21
2010	818.00	816.49	Dec 24	819.40	Mar 25
2009	817.98	816.55	Jan 22	819.02	Apr 1
2008	818.05	816.66	Jan 31	819.05	Apr 5
2007	817.83	816.55	Feb 13	819.55	Apr 19
2006	818.15	816.51	Jan 29	818.90	Mar 15
2005	817.97	816.47	Feb 7	819.68	Apr 4
2004 (279 days)	817.85	816.39	Feb 22	819.35	May 24
2003	818.18	817.08	Mar 4	819.26	Mar 22
2002	817.83	816.59	Jan 5	819.26	Apr 15
2001	817.81	816.40	Dec 13	820.00	Apr 9
2000	818.07	816.66	Jan 1	819.34	May 13
1999	817.72	816.53	Nov 25	819.03	Apr 5
1998	818.13	816.85	Jan 29	819.30	Mar 1
1997	818.18	817.44	Jan 15	819.17	Apr 6
1996	818.20	817.03	Jan 7	819.73	May 12
1995	817.93	816.93	Feb 23	818.69	Apr 21
1994	817.95	816.73	Feb 18	819.00	Jun 1
1993	817.82	816.78	Mar 10	819.41	Apr 2
1992	818.14	816.64	Jan 1	819.17	Apr 12
1991	817.68	816.31	Nov 10	819.36	Apr 23
1990	818.04	817.06	Nov 22	819.41	Apr 11
1989	817.81	816.20	Jan 1	819.51	May 12
1988	817.61	816.12	Dec 21	819.28	Apr 4
1987	817.89	816.77	Nov 24	819.85	Apr 8
1986	818.23	817.37	Nov 22	819.27	Mar 17
1985	817.83	816.69	Nov 3	818.83	Apr 1
1984	818.17	817.04	Nov 28	820.09	May 31
1983	817.73	816.60	Nov 2	819.77	May 4
1982	817.86	816.92	Oct 30	819.15	Mar 27
1981	817.85	816.96	Feb 10	819.09	Feb 26
1980	817.79	816.80	Mar 4	819.21	Apr 3
1979	817.95	817.05	Dec 22	820.20	Mar 8
1978	817.85	816.57	Dec 2	820.17	Apr 7
1977	818.62	817.13	Feb 11	821.40	Sep 27
1976	818.74	817.33	Oct 7	822.05	Mar 5
1975	818.40	817.39	Dec 5	819.75	Mar 25
1974	818.02	817.05	Nov 2	819.53	Apr 15
1973	818.26	816.84	Nov 14	820.86	Apr 7
1972	818.78	817.27	Oct 14	822.49	Jun 24
1971 (92 days)	817.16	816.95	Dec 4	817.50	Oct 1

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

Monthly averages

Month	Average	Lowest	Highest
January	817.43	816.20	819.81
February	817.53	816.31	820.47
March	818.37	816.53	822.05
April	818.87	817.49	820.86
May	818.76	817.95	820.09
June	818.57	817.34	822.49
July	818.33	817.09	821.48
August	818.06	816.88	819.27
September	817.82	816.75	821.40
October	817.64	816.47	821.24
November	817.40	816.31	819.78
December	817.34	816.12	820.58

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Daily levels as CSV (20,003 rows; credit the original agencies listed below)