Clear Lake water level history

Daily records since 1933 · Level today: 4.64 ft

Highest on record

5.96 ft

Jun 13, 2008

Lowest on record

0.78 ft

Oct 26, 1989

Today

4.64 ft

Oct 21, 2026

Years of data

since 1933

In short

Across 51 complete years, 1960 had the lowest average level (2.10 ft) and 2016 the highest (5.05 ft).

On average the lake is lowest in October (3.97 ft) and highest in May (4.47 ft).

Clear 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.

19601.62 ft on Nov 27
19611.71 ft on Jan 8
19771.92 ft on Sep 16
20121.96 ft on Dec 5
20132.11 ft on Jan 8

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (283 days)	4.76	4.43	Jun 27	5.25	Jul 9
2025	4.57	3.83	Feb 9	5.26	Jul 30
2024	4.17	3.45	Mar 21	5.29	Jul 8
2023	4.17	3.44	Dec 20	5.06	Apr 5
2022	4.44	3.78	Nov 18	5.13	Jun 16
2021	4.41	4.09	Aug 20	4.83	Mar 30
2020	4.71	4.02	Nov 5	5.30	May 27
2019	4.99	4.27	Sep 9	5.38	Mar 24
2018	4.97	4.31	Jan 1	5.54	Sep 21
2017	4.74	4.22	Sep 30	5.34	Feb 24
2016	5.05	4.80	Jul 3	5.77	Sep 23
2015	4.92	4.50	Oct 23	5.32	Jun 13
2014	4.62	3.99	Feb 27	5.45	Jul 1
2013	3.90	2.11	Jan 8	4.97	Jun 26
2012	3.05	1.96	Dec 5	4.06	May 7
2011	4.49	3.45	Dec 2	5.34	Mar 25
2010	4.82	4.12	Nov 9	5.35	Mar 20
2009	4.74	4.20	Sep 20	5.15	May 13
2008	4.67	3.79	Oct 6	5.96	Jun 13
2007	4.69	4.17	Jan 12	5.27	Apr 3
2006	4.45	3.77	Nov 5	5.22	May 1
2005	4.71	4.31	Sep 18	5.24	May 14
2004	4.50	3.74	Jan 25	5.45	Jul 10
2003	4.47	3.66	Nov 1	5.22	May 11
2002	4.74	4.48	Jul 9	5.19	Aug 6
2001	4.65	4.22	Nov 23	5.51	Apr 12
2000	4.25	3.88	Oct 29	4.77	Jul 10
1999	4.72	4.01	Nov 17	5.55	May 22
1998	4.68	4.22	Jan 1	5.30	Jun 25
1997	4.71	4.19	Nov 13	5.36	Apr 6
1996	4.75	4.31	Oct 20	5.07	Mar 25
1995	4.85	4.58	Aug 27	5.24	Jun 29
1994	4.88	4.66	Oct 1	5.22	Jul 20
1993	5.03	4.56	Nov 12	5.61	Jul 19
1992	4.92	4.60	Sep 1	5.45	Mar 11
1991	4.10	2.15	Jan 1	5.26	Jun 5
1990 (316 days)	1.63	0.79	Jan 4	2.44	Sep 8
1989 (239 days)	1.58	0.78	Oct 26	2.54	Apr 29
1988 (321 days)	3.00	2.12	Nov 5	3.64	Apr 27
1987	4.01	3.17	Oct 31	4.84	Apr 16
1986	4.77	4.43	Sep 9	5.11	Apr 5
1985 (298 days)	4.30	3.71	Aug 21	4.78	Apr 4
1984 (317 days)	4.79	3.88	Oct 5	5.71	Jun 23
1983	4.85	4.14	Sep 14	5.33	Apr 14
1982 (313 days)	4.71	4.18	Aug 28	5.19	May 27
1981 (300 days)	4.68	4.45	Jun 12	5.10	Aug 29
1980	4.66	4.12	Aug 1	5.02	Mar 16
1979	3.96	2.58	Jan 8	5.32	Aug 29
1978 (290 days)	2.43	2.08	Jun 13	2.72	Sep 21
1977	2.37	1.92	Sep 16	2.95	Apr 27
1976 (320 days)	3.72	2.44	Dec 29	4.48	Apr 30
1975 (313 days)	4.28	3.58	Nov 4	5.14	Jun 22
1974	4.43	3.74	Oct 26	5.06	Apr 4
1973	4.73	4.19	Sep 24	5.30	Mar 15
1972 (282 days)	4.67	4.23	Sep 19	4.93	May 6
1971	4.58	3.92	Oct 16	5.27	Apr 2
1970	4.63	4.20	Sep 13	5.22	May 31
1969 (266 days)	4.37	3.34	Jan 4	5.48	Jul 10
1968	3.45	3.17	Dec 9	3.77	Apr 24
1967	4.04	3.52	Dec 4	4.73	Jun 16
1966 (319 days)	4.51	3.79	Dec 3	5.05	Mar 31
1965 (312 days)	4.85	4.15	Feb 5	5.79	Apr 12
1964	4.18	3.79	Aug 18	4.61	May 24
1963 (306 days)	4.59	3.99	Nov 19	5.22	Apr 3
1962	4.18	2.99	Jan 1	5.15	Sep 9
1961	2.72	1.71	Jan 8	3.31	Apr 27
1960	2.10	1.62	Nov 27	2.63	May 26
1959 (278 days)	1.73	1.18	Jan 9	2.30	Jun 2
1958 (148 days)	2.28	1.16	Dec 20	3.08	Feb 27
1957 (172 days)	2.80	2.37	Oct 11	3.25	Mar 21
1956 (90 days)	3.54	2.79	Dec 3	4.26	Mar 2
1955 (156 days)	4.06	3.25	May 4	4.88	Jul 6
1954 (209 days)	4.55	3.80	Jan 2	5.35	Aug 25
1953 (256 days)	4.32	3.69	Nov 17	4.92	Aug 3
1952 (230 days)	4.71	4.00	Nov 22	5.40	Jul 28
1951 (155 days)	5.27	4.92	Oct 12	5.94	Jul 3
1950 (182 days)	4.19	3.88	Apr 25	4.48	Aug 11
1949 (174 days)	3.93	3.34	Oct 8	4.38	Apr 26
1948 (198 days)	4.08	3.24	Oct 31	4.72	May 8
1947 (161 days)	4.51	3.92	Oct 23	5.51	Jul 5
1946 (214 days)	4.85	4.40	Sep 4	5.16	Jun 20
1945 (223 days)	4.84	4.30	Nov 4	5.38	Jun 11
1944 (227 days)	4.78	4.20	Aug 13	5.78	Jun 14
1943 (216 days)	4.67	4.26	Nov 5	5.00	Apr 12
1942 (241 days)	4.71	4.18	Nov 8	5.29	Apr 10
1941 (190 days)	4.78	4.10	May 24	5.40	Nov 20
1940 (204 days)	3.03	2.50	Jul 18	3.40	Sep 9
1939 (243 days)	3.70	2.82	Dec 27	4.58	Apr 28
1938 (152 days)	3.56	3.00	May 4	3.90	Sep 15
1937 (195 days)	2.79	2.22	Sep 27	3.46	Jun 25
1936 (124 days)	2.02	1.44	Aug 12	2.61	Apr 18
1935 (151 days)	2.33	1.70	Sep 30	3.45	Apr 1
1934 (192 days)	2.10	1.64	Nov 17	3.30	Mar 31
1933 (207 days)	4.01	3.36	Dec 29	5.02	May 20

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

Monthly averages

Month	Average	Lowest	Highest
January	4.18	0.79	5.18
February	4.23	0.80	5.34
March	4.33	0.92	5.45
April	4.46	1.11	5.79
May	4.47	1.02	5.60
June	4.46	1.04	5.96
July	4.32	0.96	5.94
August	4.13	1.27	5.41
September	4.03	1.11	5.77
October	3.97	0.78	5.50
November	4.01	0.82	5.40
December	4.04	0.80	5.27

Download

Daily levels as CSV (28,390 rows; credit the original agencies listed below)