Country: USA
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Castle Lake water level history

Daily records since 1993 · Level today: 2,577.68 ft

Highest on record
2,582.20 ft
Feb 7, 1996
Lowest on record
2,577.38 ft
Sep 7, 2018
Today
2,577.68 ft
Oct 23, 2026
Years of data
33
since 1993

In short

Across 20 complete years, 2019 had the lowest average level (2,578.20 ft) and 1995 the highest (2,580.01 ft).

On average the lake is lowest in August (2,578.12 ft) and highest in December (2,579.10 ft).

Castle Lake level, all years

Loading chart…

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

Each year's lowest and highest level

2,5772,5782,5802,5812,5821993199720012005200920132017202120261993: lowest 2,579.53 ft (1993-10-01), highest 2,580.82 ft (1993-12-11), average 2,579.78 ft, 92 days measured1994: lowest 2,579.49 ft (1994-09-01), highest 2,581.56 ft (1994-12-20), average 2,579.94 ft, 360 days measured1995: lowest 2,579.51 ft (1995-08-03), highest 2,581.60 ft (1995-11-29), average 2,580.01 ft, 362 days measured1996: lowest 2,578.56 ft (1996-09-01), highest 2,582.20 ft (1996-02-07), average 2,579.24 ft, 366 days measured1997: lowest 2,578.53 ft (1997-08-15), highest 2,581.11 ft (1997-01-01), average 2,579.12 ft, 365 days measured1998: lowest 2,578.25 ft (1998-09-12), highest 2,581.02 ft (1998-11-25), average 2,578.95 ft, 365 days measured1999: lowest 2,578.34 ft (1999-09-24), highest 2,580.59 ft (1999-11-12), average 2,579.03 ft, 343 days measured2000: lowest 2,578.28 ft (2000-08-15), highest 2,579.50 ft (2000-02-09), average 2,578.81 ft, 324 days measured2001: lowest 2,578.40 ft (2001-10-04), highest 2,580.34 ft (2001-12-17), average 2,578.84 ft, 365 days measured2002: lowest 2,578.28 ft (2002-08-31), highest 2,581.73 ft (2002-01-07), average 2,578.82 ft, 365 days measured2003: lowest 2,578.15 ft (2003-09-01), highest 2,580.38 ft (2003-03-13), average 2,578.86 ft, 352 days measured2004: lowest 2,578.33 ft (2004-08-04), highest 2,580.20 ft (2004-01-30), average 2,578.89 ft, 366 days measured2005: lowest 2,578.22 ft (2005-09-25), highest 2,580.05 ft (2005-03-28), average 2,578.79 ft, 335 days measured2006: lowest 2,577.94 ft (2006-09-05), highest 2,581.21 ft (2006-11-06), average 2,578.67 ft, 327 days measured2007: lowest 2,578.13 ft (2007-08-12), highest 2,579.71 ft (2007-03-12), average 2,578.59 ft, 238 days measured2008: lowest 2,577.60 ft (2008-09-29), highest 2,579.98 ft (2008-05-18), average 2,578.36 ft, 289 days measured2009: lowest 2,577.77 ft (2009-08-09), highest 2,579.58 ft (2009-11-19), average 2,578.14 ft, 185 days measured2010: lowest 2,577.70 ft (2010-02-22), highest 2,579.32 ft (2010-01-15), average 2,578.37 ft, 194 days measured2011: lowest 2,577.78 ft (2011-09-14), highest 2,580.93 ft (2011-11-24), average 2,578.23 ft, 179 days measured2012: lowest 2,577.62 ft (2012-10-07), highest 2,580.34 ft (2012-11-20), average 2,578.53 ft, 322 days measured2013: lowest 2,577.70 ft (2013-08-23), highest 2,579.76 ft (2013-04-07), average 2,578.43 ft, 358 days measured2014: lowest 2,577.69 ft (2014-09-11), highest 2,580.45 ft (2014-03-06), average 2,578.54 ft, 365 days measured2015: lowest 2,577.59 ft (2015-08-27), highest 2,580.94 ft (2015-12-09), average 2,578.33 ft, 365 days measured2016: lowest 2,577.67 ft (2016-08-29), highest 2,580.20 ft (2016-10-16), average 2,578.45 ft, 365 days measured2017: lowest 2,577.47 ft (2017-09-16), highest 2,580.82 ft (2017-11-23), average 2,578.48 ft, 365 days measured2018: lowest 2,577.38 ft (2018-09-07), highest 2,579.49 ft (2018-12-20), average 2,578.25 ft, 365 days measured2019: lowest 2,577.64 ft (2019-08-27), highest 2,580.38 ft (2019-12-21), average 2,578.20 ft, 365 days measured2020: lowest 2,577.52 ft (2020-09-14), highest 2,580.38 ft (2020-02-07), average 2,578.35 ft, 366 days measured2021: lowest 2,577.67 ft (2021-07-26), highest 2,580.33 ft (2021-01-13), average 2,578.44 ft, 207 days measured2023: lowest 2,578.00 ft (2023-10-31), highest 2,580.87 ft (2023-12-06), average 2,578.64 ft, 72 days measured2024: lowest 2,577.60 ft (2024-09-24), highest 2,580.52 ft (2024-01-28), average 2,578.30 ft, 366 days measured2025: lowest 2,577.44 ft (2025-09-28), highest 2,579.71 ft (2025-02-25), average 2,578.09 ft, 275 days measured2026: lowest 2,577.52 ft (2026-09-01), highest 2,577.96 ft (2026-06-27), average 2,577.71 ft, 120 days measured
2,5772,5782,5802,5812,582199320012009201720261993: lowest 2,579.53 ft (1993-10-01), highest 2,580.82 ft (1993-12-11), average 2,579.78 ft, 92 days measured1994: lowest 2,579.49 ft (1994-09-01), highest 2,581.56 ft (1994-12-20), average 2,579.94 ft, 360 days measured1995: lowest 2,579.51 ft (1995-08-03), highest 2,581.60 ft (1995-11-29), average 2,580.01 ft, 362 days measured1996: lowest 2,578.56 ft (1996-09-01), highest 2,582.20 ft (1996-02-07), average 2,579.24 ft, 366 days measured1997: lowest 2,578.53 ft (1997-08-15), highest 2,581.11 ft (1997-01-01), average 2,579.12 ft, 365 days measured1998: lowest 2,578.25 ft (1998-09-12), highest 2,581.02 ft (1998-11-25), average 2,578.95 ft, 365 days measured1999: lowest 2,578.34 ft (1999-09-24), highest 2,580.59 ft (1999-11-12), average 2,579.03 ft, 343 days measured2000: lowest 2,578.28 ft (2000-08-15), highest 2,579.50 ft (2000-02-09), average 2,578.81 ft, 324 days measured2001: lowest 2,578.40 ft (2001-10-04), highest 2,580.34 ft (2001-12-17), average 2,578.84 ft, 365 days measured2002: lowest 2,578.28 ft (2002-08-31), highest 2,581.73 ft (2002-01-07), average 2,578.82 ft, 365 days measured2003: lowest 2,578.15 ft (2003-09-01), highest 2,580.38 ft (2003-03-13), average 2,578.86 ft, 352 days measured2004: lowest 2,578.33 ft (2004-08-04), highest 2,580.20 ft (2004-01-30), average 2,578.89 ft, 366 days measured2005: lowest 2,578.22 ft (2005-09-25), highest 2,580.05 ft (2005-03-28), average 2,578.79 ft, 335 days measured2006: lowest 2,577.94 ft (2006-09-05), highest 2,581.21 ft (2006-11-06), average 2,578.67 ft, 327 days measured2007: lowest 2,578.13 ft (2007-08-12), highest 2,579.71 ft (2007-03-12), average 2,578.59 ft, 238 days measured2008: lowest 2,577.60 ft (2008-09-29), highest 2,579.98 ft (2008-05-18), average 2,578.36 ft, 289 days measured2009: lowest 2,577.77 ft (2009-08-09), highest 2,579.58 ft (2009-11-19), average 2,578.14 ft, 185 days measured2010: lowest 2,577.70 ft (2010-02-22), highest 2,579.32 ft (2010-01-15), average 2,578.37 ft, 194 days measured2011: lowest 2,577.78 ft (2011-09-14), highest 2,580.93 ft (2011-11-24), average 2,578.23 ft, 179 days measured2012: lowest 2,577.62 ft (2012-10-07), highest 2,580.34 ft (2012-11-20), average 2,578.53 ft, 322 days measured2013: lowest 2,577.70 ft (2013-08-23), highest 2,579.76 ft (2013-04-07), average 2,578.43 ft, 358 days measured2014: lowest 2,577.69 ft (2014-09-11), highest 2,580.45 ft (2014-03-06), average 2,578.54 ft, 365 days measured2015: lowest 2,577.59 ft (2015-08-27), highest 2,580.94 ft (2015-12-09), average 2,578.33 ft, 365 days measured2016: lowest 2,577.67 ft (2016-08-29), highest 2,580.20 ft (2016-10-16), average 2,578.45 ft, 365 days measured2017: lowest 2,577.47 ft (2017-09-16), highest 2,580.82 ft (2017-11-23), average 2,578.48 ft, 365 days measured2018: lowest 2,577.38 ft (2018-09-07), highest 2,579.49 ft (2018-12-20), average 2,578.25 ft, 365 days measured2019: lowest 2,577.64 ft (2019-08-27), highest 2,580.38 ft (2019-12-21), average 2,578.20 ft, 365 days measured2020: lowest 2,577.52 ft (2020-09-14), highest 2,580.38 ft (2020-02-07), average 2,578.35 ft, 366 days measured2021: lowest 2,577.67 ft (2021-07-26), highest 2,580.33 ft (2021-01-13), average 2,578.44 ft, 207 days measured2023: lowest 2,578.00 ft (2023-10-31), highest 2,580.87 ft (2023-12-06), average 2,578.64 ft, 72 days measured2024: lowest 2,577.60 ft (2024-09-24), highest 2,580.52 ft (2024-01-28), average 2,578.30 ft, 366 days measured2025: lowest 2,577.44 ft (2025-09-28), highest 2,579.71 ft (2025-02-25), average 2,578.09 ft, 275 days measured2026: lowest 2,577.52 ft (2026-09-01), highest 2,577.96 ft (2026-06-27), average 2,577.71 ft, 120 days measured
Lowest to highest that yearYear average2026 so far

One bar per year from the lowest to the highest daily level, with the year's average. Years with no bar have no daily record in the agency archive.

Lowest years

Years ranked by their lowest daily level.

  • 20182,577.38 ft on Sep 7
  • 20172,577.47 ft on Sep 16
  • 20202,577.52 ft on Sep 14
  • 20152,577.59 ft on Aug 27
  • 20242,577.60 ft on Sep 24

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (120 days)2,577.712,577.52Sep 12,577.96Jun 27
2025 (275 days)2,578.092,577.44Sep 282,579.71Feb 25
20242,578.302,577.60Sep 242,580.52Jan 28
2023 (72 days)2,578.642,578.00Oct 312,580.87Dec 6
2021 (207 days)2,578.442,577.67Jul 262,580.33Jan 13
20202,578.352,577.52Sep 142,580.38Feb 7
20192,578.202,577.64Aug 272,580.38Dec 21
20182,578.252,577.38Sep 72,579.49Dec 20
20172,578.482,577.47Sep 162,580.82Nov 23
20162,578.452,577.67Aug 292,580.20Oct 16
20152,578.332,577.59Aug 272,580.94Dec 9
20142,578.542,577.69Sep 112,580.45Mar 6
20132,578.432,577.70Aug 232,579.76Apr 7
2012 (322 days)2,578.532,577.62Oct 72,580.34Nov 20
2011 (179 days)2,578.232,577.78Sep 142,580.93Nov 24
2010 (194 days)2,578.372,577.70Feb 222,579.32Jan 15
2009 (185 days)2,578.142,577.77Aug 92,579.58Nov 19
2008 (289 days)2,578.362,577.60Sep 292,579.98May 18
2007 (238 days)2,578.592,578.13Aug 122,579.71Mar 12
2006 (327 days)2,578.672,577.94Sep 52,581.21Nov 6
20052,578.792,578.22Sep 252,580.05Mar 28
20042,578.892,578.33Aug 42,580.20Jan 30
20032,578.862,578.15Sep 12,580.38Mar 13
20022,578.822,578.28Aug 312,581.73Jan 7
20012,578.842,578.40Oct 42,580.34Dec 17
2000 (324 days)2,578.812,578.28Aug 152,579.50Feb 9
19992,579.032,578.34Sep 242,580.59Nov 12
19982,578.952,578.25Sep 122,581.02Nov 25
19972,579.122,578.53Aug 152,581.11Jan 1
19962,579.242,578.56Sep 12,582.20Feb 7
19952,580.012,579.51Aug 32,581.60Nov 29
19942,579.942,579.49Sep 12,581.56Dec 20
1993 (92 days)2,579.782,579.53Oct 12,580.82Dec 11

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

Monthly averages

MonthAverageLowestHighest
January2,579.092,578.062,581.73
February2,578.932,577.702,582.20
March2,578.962,577.982,581.07
April2,578.962,578.242,580.50
May2,578.842,577.992,580.12
June2,578.582,577.792,580.11
July2,578.272,577.542,579.82
August2,578.122,577.422,579.76
September2,578.172,577.382,579.95
October2,578.552,577.602,580.84
November2,579.062,578.002,581.60
December2,579.102,578.022,581.56

Download

Daily levels as CSV (10,048 rows; credit the original agencies listed below)