Blue Marsh Lake water level: Blue Marsh 
5.0 ft low
Blue Marsh Lake is 5.0 ft below full pool, much lower than usual for early November. The Blue Marsh Dam gauge read 284.30 ft at 9:00 AM EST, November 4, 2026.
How Blue Marsh stands today
- 284.30 Feet above sea level9:00 AM EST, November 4, 2026, NAVD88 datum.
- −4.97 Feet from full poolFull pool today is 289.27 ft; it rises to 289.27 ft in the high season.
- −0.62 Feet from normal for Nov 4Median of 2015–2025 is 284.92 ft. Today ranks in the 0th percentile, the lowest for this date in 12 years.
- −0.40 Feet from a year ago284.70 ft on November 4, 2025.
- −5.02 Feet over 30 days−0.70 ft over the past 7 days.
The past year, day by day
The shaded band is where Blue Marsh usually sits on each date: the middle 80% of years from 2015 to 2025. The blue line is the past 12 months; the sand line is the 12 months before. Hover or use the arrow keys to read any day.
- Past 12 months
- The 12 months before
- Normal range (middle 80% of years)
- Median
- Full pool
Monthly average since 2014
Readings for the last 30 days
| Date | Level (ft) | Normal (ft) |
|---|---|---|
| November 4, 2026 | 284.28 | 284.92 |
| November 3, 2026 | 284.23 | 284.98 |
| November 2, 2026 | 284.20 | 285.04 |
| November 1, 2026 | 284.31 | 285.19 |
| October 31, 2026 | 284.46 | 285.23 |
| October 30, 2026 | 284.59 | 285.31 |
| October 29, 2026 | 284.74 | 285.49 |
| October 28, 2026 | 285.00 | 285.70 |
| October 27, 2026 | 285.30 | 285.91 |
| October 26, 2026 | 285.59 | 286.10 |
| October 25, 2026 | 285.88 | 286.34 |
| October 24, 2026 | 286.17 | 286.62 |
| October 23, 2026 | 286.44 | 286.97 |
| October 22, 2026 | 286.70 | 287.36 |
| October 21, 2026 | 286.93 | 287.79 |
| Date | Level (ft) | Normal (ft) |
|---|---|---|
| October 20, 2026 | 287.18 | 288.22 |
| October 19, 2026 | 287.45 | 288.62 |
| October 18, 2026 | 287.92 | 289.00 |
| October 17, 2026 | 288.37 | 289.32 |
| October 16, 2026 | 288.74 | 289.60 |
| October 15, 2026 | 289.17 | 289.78 |
| October 14, 2026 | 289.28 | 289.89 |
| October 13, 2026 | 289.85 | 289.92 |
| October 12, 2026 | 290.64 | 289.98 |
| October 11, 2026 | 289.55 | 290.00 |
| October 10, 2026 | 289.35 | 290.01 |
| October 9, 2026 | 289.36 | 290.04 |
| October 8, 2026 | 289.36 | 290.07 |
| October 7, 2026 | 289.34 | 290.08 |
| October 6, 2026 | 289.31 | 290.08 |
Is the water above your dock?
Enter the elevation of your dock, ramp end or a mark on your shoreline, in feet above sea level (NAVD88, the datum the Army Corps of Engineers uses for this gauge). You will see how far the water is above or below it today, and how often it dipped below it in each month since 2016.
| Month | Low year (10th %) | Median | High year (90th %) | Days above your mark |
|---|---|---|---|---|
| January | 284.99 | 285.14 | 285.59 | — |
| February | 284.99 | 285.13 | 285.55 | — |
| March | 284.82 | 285.18 | 287.62 | — |
| April | 286.67 | 289.99 | 290.21 | — |
| May | 289.99 | 290.10 | 290.49 | — |
| June | 289.99 | 290.10 | 290.31 | — |
| July | 289.98 | 290.10 | 290.39 | — |
| August | 288.91 | 290.07 | 290.37 | — |
| September | 287.95 | 290.00 | 290.28 | — |
| October | 285.11 | 288.40 | 290.12 | — |
| November | 284.48 | 285.03 | 285.38 | — |
| December | 285.01 | 285.14 | 285.85 | — |
Other Pennsylvania lakes, lowest first
| Lake | Level (ft) | Vs full pool |
|---|---|---|
| Woodcock Creek Lake | 1,164.69 | 10.2 ft below |
 Raystown Lake | 781.00 | 5.0 ft below |
| Tionesta Lake | 1,087.93 | 3.4 ft above |
| Hammond Lake | 1,085.75 | At pool |
| Crooked Creek Lake | 843.08 | 5.7 ft above |
| Beltzville Lake | 627.39 | 100.1% full |
| Tioga Lake | 1,081.28 | At pool |
| Cowanesque Lake | 1,080.21 | At pool |
| F. E. Walter Reservoir | 1,301.24 | 1.9 ft above |
| Foster Joseph Sayers Lake | 630.16 | 101.0% full |
 Curwensville Lake | 1,162.47 | At pool |
 Shenango River Lake | 894.60 | 107.9% full |
 Allegheny Reservoir (Kinzua) | 1,312.19 | 1.6 ft above |
 East Branch Clarion River Lake | 1,646.64 | 4.1 ft below |
Blue Marsh questions
What is full pool at Blue Marsh Lake?
Full pool at Blue Marsh Lake is 289.27 ft above sea level today. The Army Corps of Engineers changes it through the year, up to 289.27 ft in the high season. The agency's own term for it is “top of conservation.”
Is Blue Marsh Lake full right now?
No. It is 5.0 ft below full pool.
Is Blue Marsh Lake lower than normal for early November?
Yes. The median level on Nov 4 across 2015–2025 is 284.92 ft, and today's 284.30 ft is −0.62 ft from it. In 8 of 10 years the level on this date fell between 284.59 and 285.59 ft.
How does Blue Marsh Lake compare with last year?
A year ago, on November 4, 2025, it stood at 284.70 ft. It is 0.40 ft lower now.
What are the highest and lowest levels since 2014?
In the daily record we hold, which starts in 2014, the highest daily level was 298.68 ft on September 3, 2021 and the lowest was 283.72 ft on November 26, 2016.
How often is this page updated?
We pull new readings from the U.S. Army Corps of Engineers several times a day. This page was last rebuilt on Wed, 04 Nov 2026 15:13:17 UTC. Readings are provisional and can be revised by the agency.