Tappan Lake water level history
Daily records since 2017 · Level today: 899.12 ft
Highest on record
903.62 ft
Apr 7, 2024
Lowest on record
891.21 ft
Jan 4, 2018
Today
899.12 ft
Oct 21, 2026
Years of data
9
since 2017
In short
Across 8 complete years, 2022 had the lowest average level (897.31 ft) and 2019 the highest (898.22 ft).
On average the lake is lowest in January (893.72 ft) and highest in May (899.66 ft).
Tappan Lake level, all years
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Full pool
Lowest years
Years ranked by their lowest daily level.
- 2018
- 2022
- 2021
- 2023
- 2024
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (291 days) | 898.45 | 894.33 | Jan 24 | 901.35 | May 26 |
| 2025 | 897.67 | 893.40 | Jan 8 | 900.45 | May 5 |
| 2024 | 897.57 | 893.38 | Dec 21 | 903.62 | Apr 7 |
| 2023 | 897.53 | 893.29 | Jan 19 | 899.86 | May 4 |
| 2022 | 897.31 | 891.23 | Feb 9 | 902.24 | May 10 |
| 2021 | 897.88 | 891.43 | Dec 28 | 900.98 | Aug 21 |
| 2020 | 897.76 | 894.00 | Jan 10 | 901.49 | Mar 24 |
| 2019 | 898.22 | 894.09 | Dec 21 | 900.96 | Jun 23 |
| 2018 | 897.85 | 891.21 | Jan 4 | 901.27 | Apr 19 |
| 2017 (93 days) | 896.72 | 891.28 | Dec 30 | 899.92 | Nov 7 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 893.72 | 891.21 | 897.04 |
| February | 894.52 | 891.23 | 899.13 |
| March | 897.33 | 894.18 | 901.49 |
| April | 899.66 | 896.77 | 903.62 |
| May | 899.66 | 899.27 | 902.24 |
| June | 899.46 | 898.95 | 900.96 |
| July | 899.25 | 898.57 | 900.71 |
| August | 899.10 | 898.14 | 900.98 |
| September | 898.97 | 897.86 | 900.25 |
| October | 898.76 | 897.45 | 899.77 |
| November | 898.03 | 895.29 | 899.92 |
| December | 894.47 | 891.28 | 897.42 |
Download
Daily levels as CSV (3,304 rows; credit the original agencies listed below)