San Carlos Reservoir water level history

Daily records since 1986 · Level today: 2,420.52 ft

Highest on record

2,521.36 ft

Jan 20, 1993

Lowest on record

2,391.39 ft

May 2, 2013

Today

2,420.52 ft

Oct 22, 2026

Years of data

since 1986

In short

Across 35 complete years, 2012 had the lowest average level (2,404.75 ft) and 1995 the highest (2,497.79 ft).

On average the lake is lowest in September (2,436.61 ft) and highest in March (2,454.49 ft).

San Carlos Reservoir 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.

20132,391.39 ft on May 2
20122,397.30 ft on Aug 19
20112,399.93 ft on Aug 22
20252,400.81 ft on Oct 10
20152,404.09 ft on Sep 21

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (293 days)	2,405.19	2,394.75	Aug 3	2,420.53	Oct 16
2025	2,426.29	2,400.81	Oct 10	2,447.38	Feb 6
2024	2,461.84	2,446.89	Dec 27	2,472.79	Apr 11
2023	2,476.21	2,456.73	Jan 1	2,487.63	Apr 24
2022 (276 days)	2,420.78	2,394.57	Jun 17	2,456.47	Dec 31
2021 (11 days)	2,412.83	2,412.81	Jan 10	2,412.83	Jan 1
2020	2,433.09	2,412.82	Dec 29	2,454.23	Apr 17
2019 (61 days)	2,410.89	2,404.25	Nov 1	2,421.77	Dec 31
2018 (232 days)	2,416.45	2,402.55	Aug 20	2,427.84	Mar 1
2017	2,441.98	2,423.24	Jan 1	2,458.81	Mar 27
2016	2,422.46	2,408.18	Sep 8	2,438.23	Mar 5
2015	2,425.91	2,404.09	Sep 21	2,443.19	Mar 9
2014	2,425.32	2,405.44	Aug 4	2,440.88	Jan 23
2013	2,412.74	2,391.39	May 2	2,440.07	Dec 31
2012	2,404.75	2,397.30	Aug 19	2,413.30	Mar 25
2011	2,417.32	2,399.93	Aug 22	2,438.83	Jan 27
2010	2,446.15	2,405.45	Jan 1	2,464.01	May 4
2009	2,432.48	2,405.21	Dec 28	2,456.37	Feb 23
2008	2,460.79	2,448.68	Jan 1	2,472.66	Mar 13
2007	2,451.64	2,440.75	Oct 29	2,463.29	Mar 7
2006	2,447.67	2,422.45	Jul 28	2,462.62	Dec 8
2005	2,460.85	2,412.94	Jan 1	2,479.40	Mar 28
2004	2,412.57	2,408.99	Oct 9	2,416.92	Apr 22
2003	2,416.90	2,414.21	Dec 27	2,420.02	Mar 23
2002	2,423.08	2,418.03	Dec 30	2,428.40	Feb 13
2001	2,446.98	2,427.31	Dec 31	2,461.12	Mar 16
2000	2,426.08	2,413.70	Oct 8	2,457.29	Dec 31
1999	2,426.10	2,418.95	Jul 13	2,431.70	Feb 5
1998	2,443.60	2,429.71	Oct 19	2,461.38	May 3
1997	2,438.39	2,419.42	Sep 20	2,453.67	Mar 21
1996	2,463.12	2,441.18	Sep 12	2,486.23	Feb 11
1995	2,497.79	2,478.65	Jan 1	2,511.19	Mar 8
1994	2,470.73	2,449.50	Oct 14	2,487.33	Feb 19
1993	2,496.33	2,484.35	Oct 15	2,521.36	Jan 20
1992	2,492.64	2,479.16	Jan 1	2,502.19	Jun 2
1991	2,470.15	2,430.89	Jan 1	2,484.88	May 6
1990	2,420.05	2,414.43	Jul 7	2,429.58	Dec 31
1989	2,450.81	2,422.33	Dec 26	2,479.07	Feb 7
1988	2,478.60	2,464.42	Aug 16	2,488.07	Feb 22
1987	2,493.35	2,482.20	Oct 8	2,503.70	Apr 25
1986 (92 days)	2,494.18	2,490.60	Oct 3	2,498.80	Dec 30

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

Monthly averages

Month	Average	Lowest	Highest
January	2,446.76	2,401.42	2,521.36
February	2,451.83	2,404.81	2,516.48
March	2,454.49	2,406.28	2,514.78
April	2,452.43	2,398.13	2,510.27
May	2,448.99	2,391.39	2,509.11
June	2,444.56	2,393.31	2,506.54
July	2,439.55	2,393.04	2,502.37
August	2,436.68	2,394.75	2,496.50
September	2,436.61	2,399.70	2,491.02
October	2,439.18	2,400.81	2,492.00
November	2,440.20	2,401.71	2,495.20
December	2,441.75	2,400.16	2,498.80

Download

Daily levels as CSV (13,730 rows; credit the original agencies listed below)