Country: USA
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Agency Lake water level history

Daily records since 2013 · Level today: 4,138.61 ft

Highest on record
4,143.33 ft
May 15, 2019
Lowest on record
4,137.83 ft
Sep 27, 2014
Today
4,138.61 ft
Oct 23, 2026
Years of data
13
since 2013

In short

Across 12 complete years, 2021 had the lowest average level (4,139.64 ft) and 2025 the highest (4,141.17 ft).

On average the lake is lowest in October (4,138.68 ft) and highest in April (4,142.34 ft).

Agency Lake level, all years

Loading chart…

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

Each year's lowest and highest level

4,1384,1394,1414,1424,144201320152017201920212023202520262013: lowest 4,139.53 ft (2013-12-24), highest 4,139.65 ft (2013-12-31), average 4,139.59 ft, 8 days measured2014: lowest 4,137.83 ft (2014-09-27), highest 4,142.43 ft (2014-03-31), average 4,140.11 ft, 360 days measured2015: lowest 4,137.98 ft (2015-11-25), highest 4,143.17 ft (2015-04-06), average 4,140.62 ft, 365 days measured2016: lowest 4,137.95 ft (2016-09-22), highest 4,143.31 ft (2016-04-22), average 4,140.67 ft, 366 days measured2017: lowest 4,138.50 ft (2017-10-03), highest 4,143.05 ft (2017-04-07), average 4,140.82 ft, 362 days measured2018: lowest 4,138.02 ft (2018-10-14), highest 4,142.84 ft (2018-04-07), average 4,140.41 ft, 365 days measured2019: lowest 4,138.84 ft (2019-11-20), highest 4,143.33 ft (2019-05-15), average 4,140.96 ft, 365 days measured2020: lowest 4,137.83 ft (2020-10-25), highest 4,142.19 ft (2020-03-30), average 4,140.13 ft, 366 days measured2021: lowest 4,138.33 ft (2021-10-11), highest 4,141.05 ft (2021-03-18), average 4,139.64 ft, 365 days measured2022: lowest 4,138.51 ft (2022-10-22), highest 4,141.09 ft (2022-04-04), average 4,139.85 ft, 364 days measured2023: lowest 4,138.69 ft (2023-10-28), highest 4,142.63 ft (2023-05-08), average 4,140.51 ft, 365 days measured2024: lowest 4,138.89 ft (2024-10-17), highest 4,143.08 ft (2024-05-06), average 4,140.95 ft, 366 days measured2025: lowest 4,139.06 ft (2025-10-14), highest 4,143.21 ft (2025-04-07), average 4,141.17 ft, 365 days measured2026: lowest 4,138.42 ft (2026-10-11), highest 4,142.71 ft (2026-04-01), average 4,141.00 ft, 294 days measured
4,1384,1394,1414,1424,14420132017202120262013: lowest 4,139.53 ft (2013-12-24), highest 4,139.65 ft (2013-12-31), average 4,139.59 ft, 8 days measured2014: lowest 4,137.83 ft (2014-09-27), highest 4,142.43 ft (2014-03-31), average 4,140.11 ft, 360 days measured2015: lowest 4,137.98 ft (2015-11-25), highest 4,143.17 ft (2015-04-06), average 4,140.62 ft, 365 days measured2016: lowest 4,137.95 ft (2016-09-22), highest 4,143.31 ft (2016-04-22), average 4,140.67 ft, 366 days measured2017: lowest 4,138.50 ft (2017-10-03), highest 4,143.05 ft (2017-04-07), average 4,140.82 ft, 362 days measured2018: lowest 4,138.02 ft (2018-10-14), highest 4,142.84 ft (2018-04-07), average 4,140.41 ft, 365 days measured2019: lowest 4,138.84 ft (2019-11-20), highest 4,143.33 ft (2019-05-15), average 4,140.96 ft, 365 days measured2020: lowest 4,137.83 ft (2020-10-25), highest 4,142.19 ft (2020-03-30), average 4,140.13 ft, 366 days measured2021: lowest 4,138.33 ft (2021-10-11), highest 4,141.05 ft (2021-03-18), average 4,139.64 ft, 365 days measured2022: lowest 4,138.51 ft (2022-10-22), highest 4,141.09 ft (2022-04-04), average 4,139.85 ft, 364 days measured2023: lowest 4,138.69 ft (2023-10-28), highest 4,142.63 ft (2023-05-08), average 4,140.51 ft, 365 days measured2024: lowest 4,138.89 ft (2024-10-17), highest 4,143.08 ft (2024-05-06), average 4,140.95 ft, 366 days measured2025: lowest 4,139.06 ft (2025-10-14), highest 4,143.21 ft (2025-04-07), average 4,141.17 ft, 365 days measured2026: lowest 4,138.42 ft (2026-10-11), highest 4,142.71 ft (2026-04-01), average 4,141.00 ft, 294 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.

  • 20204,137.83 ft on Oct 25
  • 20144,137.83 ft on Sep 27
  • 20164,137.95 ft on Sep 22
  • 20154,137.98 ft on Nov 25
  • 20184,138.02 ft on Oct 14

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (294 days)4,141.004,138.42Oct 114,142.71Apr 1
20254,141.174,139.06Oct 144,143.21Apr 7
20244,140.954,138.89Oct 174,143.08May 6
20234,140.514,138.69Oct 284,142.63May 8
20224,139.854,138.51Oct 224,141.09Apr 4
20214,139.644,138.33Oct 114,141.05Mar 18
20204,140.134,137.83Oct 254,142.19Mar 30
20194,140.964,138.84Nov 204,143.33May 15
20184,140.414,138.02Oct 144,142.84Apr 7
20174,140.824,138.50Oct 34,143.05Apr 7
20164,140.674,137.95Sep 224,143.31Apr 22
20154,140.624,137.98Nov 254,143.17Apr 6
20144,140.114,137.83Sep 274,142.43Mar 31
2013 (8 days)4,139.594,139.53Dec 244,139.65Dec 31

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

Monthly averages

MonthAverageLowestHighest
January4,140.464,139.304,141.62
February4,141.294,139.994,142.51
March4,142.054,140.424,143.20
April4,142.344,140.494,143.31
May4,142.154,140.154,143.33
June4,141.584,139.734,143.22
July4,140.584,139.144,141.83
August4,139.584,138.434,140.75
September4,138.884,137.834,139.82
October4,138.684,137.834,139.67
November4,138.924,137.984,139.96
December4,139.544,138.314,140.89

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Daily levels as CSV (4,676 rows; credit the original agencies listed below)