Oahe Reservoir water level history

Daily records since 1989 · Level today: 1,592.15 ft

Highest on record

1,619.59 ft

Jun 27, 2011

Lowest on record

1,570.08 ft

Aug 30, 2006

Today

1,592.15 ft

Oct 21, 2026

Years of data

since 1989

In short

Across 36 complete years, 2006 had the lowest average level (1,574.76 ft) and 1997 the highest (1,614.67 ft).

On average the lake is lowest in January (1,597.43 ft) and highest in July (1,603.35 ft).

Oahe Reservoir level, all years

Loading chart…

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

Lowest years

Years ranked by their lowest daily level.

20061,570.08 ft on Aug 30
20071,571.91 ft on Feb 15
20041,571.93 ft on Sep 2
20051,572.34 ft on Sep 5
20031,576.23 ft on Dec 16

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (293 days)	1,598.13	1,591.53	Oct 2	1,602.47	Mar 15
2025	1,599.02	1,596.87	Jan 8	1,601.03	Dec 28
2024	1,601.58	1,596.10	Dec 3	1,605.59	Aug 5
2023	1,598.83	1,589.77	Jan 1	1,604.54	Jul 10
2022	1,595.12	1,588.95	Dec 9	1,598.86	Jul 19
2021	1,602.95	1,596.26	Nov 14	1,607.61	Mar 30
2020	1,609.68	1,606.78	Nov 30	1,612.55	Aug 28
2019	1,612.85	1,605.82	Feb 1	1,618.52	Jun 1
2018	1,610.83	1,605.81	Jan 17	1,617.22	Aug 1
2017	1,609.08	1,606.65	Dec 31	1,611.01	Sep 15
2016	1,609.75	1,607.42	Feb 6	1,612.41	Jun 22
2015	1,609.85	1,606.85	Jan 22	1,613.48	Jul 17
2014	1,608.29	1,601.29	Jan 15	1,615.48	Sep 4
2013	1,599.42	1,593.65	Jan 1	1,603.31	Jul 14
2012	1,602.20	1,593.36	Nov 30	1,607.32	Jun 11
2011	1,611.98	1,604.80	Jan 5	1,619.59	Jun 27
2010	1,611.76	1,604.68	Dec 26	1,617.74	Jun 27
2009	1,606.49	1,592.55	Jan 10	1,613.86	Jun 7
2008	1,588.44	1,581.70	Feb 21	1,594.35	Dec 14
2007	1,578.77	1,571.91	Feb 15	1,583.14	Jun 26
2006	1,574.76	1,570.08	Aug 30	1,577.70	Mar 2
2005	1,575.26	1,572.34	Sep 5	1,577.94	Jul 5
2004	1,576.80	1,571.93	Sep 2	1,582.12	Apr 2
2003	1,584.30	1,576.23	Dec 16	1,588.81	May 30
2002	1,592.18	1,583.53	Nov 27	1,599.14	Feb 25
2001	1,602.96	1,597.01	Jan 4	1,608.62	Jun 30
2000	1,603.65	1,596.79	Dec 2	1,607.88	Mar 8
1999	1,611.74	1,606.12	Jan 23	1,617.48	Jul 9
1998	1,609.70	1,607.41	Dec 31	1,612.59	Jul 22
1997	1,614.67	1,607.42	Jan 1	1,618.56	May 8
1996	1,613.23	1,607.49	Dec 31	1,618.55	Jun 23
1995	1,611.11	1,602.99	Jan 10	1,618.68	Jun 25
1994	1,608.26	1,603.28	Dec 16	1,611.75	Apr 4
1993	1,602.73	1,591.44	Jan 15	1,611.52	Sep 13
1992	1,590.76	1,587.67	Jan 1	1,592.88	Mar 21
1991	1,587.02	1,582.01	Jan 5	1,592.92	Jul 7
1990	1,586.58	1,580.98	Oct 28	1,590.96	Mar 22
1989 (1 days)	1,583.81	1,583.81	Dec 31	1,583.81	Dec 31

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

Monthly averages

Month	Average	Lowest	Highest
January	1,597.43	1,572.80	1,609.71
February	1,598.13	1,571.91	1,611.20
March	1,599.68	1,572.27	1,617.89
April	1,600.86	1,573.54	1,618.38
May	1,601.73	1,574.79	1,618.78
June	1,602.98	1,575.82	1,619.59
July	1,603.35	1,573.51	1,619.58
August	1,602.32	1,570.08	1,618.25
September	1,600.82	1,570.38	1,617.44
October	1,599.48	1,571.41	1,616.53
November	1,598.66	1,572.69	1,615.87
December	1,597.92	1,572.88	1,612.40

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Daily levels as CSV (13,443 rows; credit the original agencies listed below)