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Lago Portugues water level history

Daily records since 2021 · Level today: 434.92 ft

Highest on record
464.84 ft
Sep 18, 2022
Lowest on record
429.88 ft
Jun 21, 2022
Today
434.92 ft
Oct 23, 2026
Years of data
5
since 2021

In short

Across 4 complete years, 2022 had the lowest average level (436.14 ft) and 2025 the highest (440.11 ft).

On average the lake is lowest in June (437.63 ft) and highest in November (440.46 ft).

Lago Portugues level, all years

Loading chart…

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

Each year's lowest and highest level

4284384474574672021202220232024202520262021: lowest 435.09 ft (2021-09-08), highest 442.94 ft (2021-10-13), average 438.40 ft, 122 days measured2022: lowest 429.88 ft (2022-06-21), highest 464.84 ft (2022-09-18), average 436.14 ft, 358 days measured2023: lowest 436.73 ft (2023-04-24), highest 450.21 ft (2023-08-26), average 439.59 ft, 335 days measured2024: lowest 435.71 ft (2024-04-16), highest 452.46 ft (2024-05-07), average 439.69 ft, 360 days measured2025: lowest 438.84 ft (2025-03-17), highest 448.68 ft (2025-11-02), average 440.11 ft, 360 days measured2026: lowest 432.87 ft (2026-09-01), highest 444.33 ft (2026-02-02), average 438.64 ft, 260 days measured
42843844745746720212023202520262021: lowest 435.09 ft (2021-09-08), highest 442.94 ft (2021-10-13), average 438.40 ft, 122 days measured2022: lowest 429.88 ft (2022-06-21), highest 464.84 ft (2022-09-18), average 436.14 ft, 358 days measured2023: lowest 436.73 ft (2023-04-24), highest 450.21 ft (2023-08-26), average 439.59 ft, 335 days measured2024: lowest 435.71 ft (2024-04-16), highest 452.46 ft (2024-05-07), average 439.69 ft, 360 days measured2025: lowest 438.84 ft (2025-03-17), highest 448.68 ft (2025-11-02), average 440.11 ft, 360 days measured2026: lowest 432.87 ft (2026-09-01), highest 444.33 ft (2026-02-02), average 438.64 ft, 260 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.

  • 2022429.88 ft on Jun 21
  • 2024435.71 ft on Apr 16
  • 2023436.73 ft on Apr 24
  • 2025438.84 ft on Mar 17

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (260 days)438.64432.87Sep 1444.33Feb 2
2025440.11438.84Mar 17448.68Nov 2
2024439.69435.71Apr 16452.46May 7
2023439.59436.73Apr 24450.21Aug 26
2022436.14429.88Jun 21464.84Sep 18
2021 (122 days)438.40435.09Sep 8442.94Oct 13

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

Monthly averages

MonthAverageLowestHighest
January439.40435.02442.25
February438.64432.97444.33
March437.96431.43442.02
April437.66430.66446.91
May438.22430.36452.46
June437.63429.88441.41
July437.80430.46440.69
August439.04432.93450.21
September439.39432.06464.84
October439.32433.68445.29
November440.46434.69449.37
December440.13438.11441.71

Download

Daily levels as CSV (1,795 rows; credit the original agencies listed below)