Wanapum Lake water level history
Daily records since 1989 · Level today: 566.87 ft
Highest on record
574.93 ft
Dec 31, 1996
Lowest on record
523.61 ft
May 19, 2019
Today
566.87 ft
Oct 21, 2026
Years of data
37
since 1989
In short
Across 36 complete years, 2014 had the lowest average level (561.75 ft) and 1991 the highest (570.27 ft).
On average the lake is lowest in October (567.62 ft) and highest in June (569.96 ft).
Wanapum 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.
- 2019
- 2015
- 2014
- 1998
- 1993
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (293 days) | 568.58 | 544.65 | Jul 13 | 571.12 | Mar 20 |
| 2025 | 568.59 | 564.71 | Jan 9 | 571.04 | Mar 31 |
| 2024 | 568.44 | 565.29 | May 6 | 570.88 | Mar 22 |
| 2023 | 568.09 | 564.23 | Apr 4 | 570.96 | May 4 |
| 2022 | 569.49 | 564.07 | Oct 24 | 571.19 | Jan 20 |
| 2021 | 568.82 | 563.06 | Sep 10 | 571.26 | Jan 28 |
| 2020 | 569.08 | 563.59 | Oct 9 | 571.30 | May 18 |
| 2019 | 567.37 | 523.61 | May 19 | 571.25 | May 31 |
| 2018 | 568.79 | 563.90 | Oct 5 | 571.37 | May 5 |
| 2017 | 569.22 | 564.37 | Oct 18 | 571.31 | May 26 |
| 2016 | 569.14 | 564.42 | Feb 18 | 571.42 | Apr 17 |
| 2015 | 567.09 | 560.12 | Feb 24 | 570.95 | Jun 21 |
| 2014 | 561.75 | 560.22 | Nov 29 | 571.22 | Jan 27 |
| 2013 | 570.05 | 564.89 | Mar 11 | 571.38 | Apr 8 |
| 2012 | 569.87 | 564.79 | Jan 30 | 571.41 | Mar 21 |
| 2011 | 569.65 | 564.53 | Dec 16 | 571.38 | Feb 11 |
| 2010 | 568.80 | 563.44 | May 2 | 571.27 | Jun 28 |
| 2009 | 569.00 | 563.50 | Mar 8 | 571.21 | Apr 24 |
| 2008 | 569.21 | 563.72 | Apr 7 | 571.36 | May 24 |
| 2007 | 569.27 | 563.92 | Feb 19 | 571.46 | Mar 24 |
| 2006 | 569.73 | 565.27 | May 15 | 571.46 | Apr 14 |
| 2005 | 568.89 | 562.70 | Apr 11 | 571.18 | May 27 |
| 2004 | 568.96 | 563.21 | Oct 24 | 571.50 | Aug 31 |
| 2003 | 568.82 | 563.37 | Nov 10 | 571.45 | May 29 |
| 2002 | 569.32 | 563.46 | Nov 18 | 571.70 | Jul 1 |
| 2001 | 568.73 | 562.65 | May 7 | 571.21 | Jun 7 |
| 2000 | 568.97 | 564.87 | Nov 11 | 571.68 | Apr 25 |
| 1999 | 569.27 | 563.52 | Oct 30 | 571.91 | Jun 24 |
| 1998 | 569.20 | 561.02 | Mar 26 | 571.51 | Jun 3 |
| 1997 | 569.54 | 563.05 | Oct 17 | 571.77 | Apr 29 |
| 1996 | 569.91 | 563.68 | Oct 14 | 574.93 | Dec 31 |
| 1995 | 569.65 | 563.34 | Oct 15 | 572.10 | Nov 30 |
| 1994 | 569.45 | 563.55 | Oct 16 | 571.35 | Jun 13 |
| 1993 | 568.68 | 562.29 | Apr 6 | 571.25 | May 21 |
| 1992 | 569.01 | 563.10 | Oct 15 | 571.46 | Jun 26 |
| 1991 | 570.27 | 563.98 | Nov 13 | 573.94 | Jun 5 |
| 1990 | 570.17 | 563.31 | Oct 26 | 573.55 | Jun 8 |
| 1989 (1 days) | 567.00 | 567.00 | Dec 31 | 567.00 | Dec 31 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 569.03 | 560.23 | 571.63 |
| February | 568.81 | 560.12 | 572.39 |
| March | 568.42 | 545.61 | 572.76 |
| April | 568.71 | 560.24 | 572.02 |
| May | 569.63 | 523.61 | 574.06 |
| June | 569.96 | 560.24 | 574.93 |
| July | 569.41 | 544.65 | 572.25 |
| August | 569.25 | 560.23 | 571.61 |
| September | 568.75 | 560.23 | 571.22 |
| October | 567.62 | 560.22 | 571.64 |
| November | 568.10 | 560.22 | 572.54 |
| December | 568.96 | 544.37 | 574.93 |
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Daily levels as CSV (13,440 rows; credit the original agencies listed below)