Hempstead Lake water level history
Daily records since 2022 · Level today: 21.14 ft
Highest on record
23.81 ft
Dec 12, 2023
Lowest on record
18.23 ft
Sep 30, 2022
Today
21.14 ft
Oct 24, 2026
Years of data
4
since 2022
In short
Across 3 complete years, 2024 had the lowest average level (20.38 ft) and 2023 the highest (21.54 ft).
On average the lake is lowest in November (20.25 ft) and highest in May (22.04 ft).
Hempstead Lake level, all years
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Each year's lowest and highest level
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.
- 2024
- 2023
- 2025
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (294 days) | 21.53 | 20.30 | Feb 18 | 23.04 | May 21 |
| 2025 | 21.41 | 19.80 | Oct 29 | 23.30 | May 24 |
| 2024 | 20.38 | 18.24 | Nov 2 | 21.91 | Aug 8 |
| 2023 | 21.54 | 19.79 | Sep 22 | 23.81 | Dec 12 |
| 2022 (192 days) | 19.72 | 18.23 | Sep 30 | 20.96 | Dec 24 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 20.92 | 19.13 | 21.98 |
| February | 21.15 | 20.30 | 22.13 |
| March | 21.84 | 20.49 | 22.86 |
| April | 21.76 | 20.54 | 23.20 |
| May | 22.04 | 20.38 | 23.30 |
| June | 21.14 | 20.13 | 22.45 |
| July | 20.82 | 20.04 | 21.55 |
| August | 20.73 | 18.90 | 22.49 |
| September | 20.31 | 18.23 | 23.53 |
| October | 20.65 | 18.27 | 23.51 |
| November | 20.25 | 18.24 | 22.69 |
| December | 20.95 | 19.69 | 23.81 |
Download
Daily levels as CSV (1,582 rows; credit the original agencies listed below)