Swanson Lake water level history

Daily records since 1990 · Level today: 2,734.03 ft

Highest on record

2,756.04 ft

May 7, 1994

Lowest on record

2,724.30 ft

Aug 26, 2002

Today

2,734.03 ft

Oct 21, 2026

Years of data

since 1990

In short

Across 36 complete years, 2002 had the lowest average level (2,727.43 ft) and 1994 the highest (2,750.04 ft).

On average the lake is lowest in October (2,735.37 ft) and highest in June (2,741.54 ft).

Loading chart…

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

Years ranked by their lowest daily level.

Year	Average	Low	Low date	High	High date
2026 (289 days)	2,737.28	2,734.03	Oct 21	2,739.64	Jun 26
2025	2,737.71	2,734.87	Sep 16	2,740.45	Jun 18
2024	2,739.55	2,736.67	Nov 1	2,742.90	Jun 8
2023	2,734.57	2,727.59	Jan 1	2,738.64	Dec 31
2022	2,733.37	2,727.51	Dec 21	2,738.32	May 9
2021	2,739.27	2,735.65	Dec 19	2,743.30	Jun 11
2020	2,740.88	2,738.24	Nov 16	2,743.86	Jun 5
2019	2,741.58	2,739.01	Nov 19	2,744.78	Jun 21
2018	2,740.05	2,737.36	Jan 1	2,742.68	Jun 26
2017	2,738.47	2,735.67	Jan 1	2,742.22	Jun 9
2016	2,737.28	2,734.86	Jan 1	2,741.72	Jun 3
2015	2,734.50	2,728.98	Jan 1	2,739.74	Jun 24
2014	2,728.62	2,726.77	Oct 15	2,730.40	Jun 10
2013	2,731.49	2,728.83	Nov 3	2,734.19	May 2
2012	2,738.36	2,732.35	Dec 13	2,744.03	May 5
2011	2,741.73	2,739.37	Nov 12	2,745.40	Jun 21
2010	2,741.59	2,738.20	Jan 1	2,745.65	Jun 15
2009	2,738.39	2,735.58	Oct 13	2,742.04	Jun 17
2008	2,736.98	2,734.74	Jan 1	2,738.49	Jun 7
2007	2,735.22	2,731.72	Jan 1	2,737.14	Jun 22
2006	2,732.52	2,731.39	Jan 1	2,733.69	Apr 18
2005	2,731.82	2,729.52	Jan 1	2,733.28	Jun 21
2004	2,729.09	2,727.76	Jan 2	2,730.20	Jul 26
2003	2,728.43	2,725.50	Jan 1	2,730.52	Jun 2
2002	2,727.43	2,724.30	Aug 26	2,730.75	May 8
2001	2,729.58	2,725.89	Nov 7	2,735.25	May 16
2000	2,735.01	2,726.85	Oct 21	2,743.16	May 11
1999	2,739.76	2,735.83	Oct 3	2,744.94	Jun 23
1998	2,743.12	2,736.69	Oct 26	2,749.44	May 30
1997	2,748.57	2,742.59	Oct 24	2,754.44	Jun 18
1996	2,748.08	2,745.17	Jan 1	2,752.10	Jun 23
1995	2,748.30	2,743.29	Oct 22	2,754.86	Jun 20
1994	2,750.04	2,744.29	Oct 4	2,756.04	May 7
1993	2,748.65	2,743.33	Jan 1	2,752.29	Jun 14
1992	2,742.02	2,736.22	Jan 1	2,745.53	Jun 23
1991	2,736.05	2,732.03	Oct 18	2,742.91	Jun 22
1990	2,739.03	2,731.79	Oct 20	2,747.65	Jun 11

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

Month	Average	Lowest	Highest
January	2,736.77	2,725.50	2,751.67
February	2,737.77	2,726.00	2,753.07
March	2,738.98	2,727.09	2,754.55
April	2,740.13	2,728.32	2,755.95
May	2,741.02	2,729.28	2,756.04
June	2,741.54	2,729.16	2,755.50
July	2,739.64	2,724.69	2,754.67
August	2,737.03	2,724.30	2,751.72
September	2,735.63	2,725.79	2,747.90
October	2,735.37	2,725.57	2,748.36
November	2,735.52	2,725.52	2,749.27
December	2,736.00	2,725.49	2,750.44

Daily levels as CSV (13,438 rows; credit the original agencies listed below)