Grayson Lake water level history
Daily records since 2020 · Level today: 643.50 ft
Highest on record
663.80 ft
Apr 8, 2025
Lowest on record
636.12 ft
Feb 27, 2025
Today
643.50 ft
Oct 21, 2026
Years of data
6
since 2020
In short
Across 5 complete years, 2024 had the lowest average level (641.53 ft) and 2021 the highest (643.46 ft).
On average the lake is lowest in December (637.95 ft) and highest in June (645.41 ft).
Grayson 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.
- 2025
- 2022
- 2021
- 2023
- 2024
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (292 days) | 641.82 | 637.30 | Feb 1 | 648.32 | May 28 |
| 2025 | 643.37 | 636.12 | Feb 27 | 663.80 | Apr 8 |
| 2024 | 641.53 | 637.22 | Jan 12 | 650.54 | Apr 13 |
| 2023 | 642.16 | 637.13 | Dec 25 | 651.55 | Feb 18 |
| 2022 | 642.87 | 636.82 | Jan 22 | 649.93 | Mar 9 |
| 2021 | 643.46 | 636.85 | Mar 15 | 661.72 | Mar 4 |
| 2020 (142 days) | 643.16 | 637.42 | Dec 24 | 647.83 | Oct 30 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 638.31 | 636.82 | 647.01 |
| February | 640.20 | 636.12 | 654.53 |
| March | 639.46 | 636.85 | 661.72 |
| April | 644.51 | 637.50 | 663.80 |
| May | 645.07 | 640.06 | 648.32 |
| June | 645.41 | 644.50 | 648.51 |
| July | 645.34 | 643.00 | 646.32 |
| August | 644.71 | 641.34 | 647.06 |
| September | 644.07 | 639.76 | 646.82 |
| October | 643.92 | 641.12 | 647.83 |
| November | 641.57 | 637.51 | 647.10 |
| December | 637.95 | 637.13 | 642.50 |
Download
Daily levels as CSV (2,260 rows; credit the original agencies listed below)