Tappan Lake water level: Tappan 
Full
Tappan Lake is at full pool, much lower than usual for early November. The gauge read 898.98 ft at 9:15 AM EST, November 4, 2026.
How Tappan stands today
- 898.98 Feet above sea level9:15 AM EST, November 4, 2026, NGVD29 datum.
- −0.32 Feet from full poolFull pool today is 899.30 ft; it rises to 899.30 ft in the high season.
- 97.9 Percent of conservation storageWater held above top of inactive, as a share of the pool's capacity.
- −0.32 Feet from normal for Nov 4Median of 2013–2025 is 899.30 ft. Today ranks in the 8th percentile.
- −0.32 Feet from a year ago899.30 ft on November 4, 2025.
- −0.22 Feet over 30 days−0.08 ft over the past 7 days.
The past year, day by day
The shaded band is where Tappan usually sits on each date: the middle 80% of years from 2013 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 2013
Readings for the last 30 days
| Date | Level (ft) | Normal (ft) |
|---|---|---|
| November 4, 2026 | 898.98 | 899.30 |
| November 3, 2026 | 898.99 | 899.30 |
| November 2, 2026 | 899.00 | 899.30 |
| November 1, 2026 | 899.01 | 899.30 |
| October 31, 2026 | 899.03 | 899.30 |
| October 30, 2026 | 899.03 | 899.30 |
| October 29, 2026 | 899.05 | 899.30 |
| October 28, 2026 | 899.06 | 899.30 |
| October 27, 2026 | 899.07 | 899.30 |
| October 26, 2026 | 899.08 | 899.30 |
| October 25, 2026 | 899.09 | 899.30 |
| October 24, 2026 | 899.09 | 899.30 |
| October 23, 2026 | 899.10 | 899.30 |
| October 22, 2026 | 899.11 | 899.30 |
| October 21, 2026 | 899.12 | 899.30 |
| Date | Level (ft) | Normal (ft) |
|---|---|---|
| October 20, 2026 | 899.13 | 899.30 |
| October 19, 2026 | 899.14 | 899.30 |
| October 18, 2026 | 899.15 | 899.30 |
| October 17, 2026 | 899.15 | 899.30 |
| October 16, 2026 | 899.13 | 899.30 |
| October 15, 2026 | 899.14 | 899.30 |
| October 14, 2026 | 899.14 | 899.30 |
| October 13, 2026 | 899.14 | 899.30 |
| October 12, 2026 | 899.14 | 899.30 |
| October 11, 2026 | 899.13 | 899.30 |
| October 10, 2026 | 899.12 | 899.30 |
| October 9, 2026 | 899.13 | 899.30 |
| October 8, 2026 | 899.15 | 899.30 |
| October 7, 2026 | 899.17 | 899.30 |
| October 6, 2026 | 899.18 | 899.30 |
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 (NGVD29, 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 | 891.30 | 891.30 | 894.30 | — |
| February | 891.30 | 894.30 | 897.30 | — |
| March | 897.30 | 897.30 | 899.30 | — |
| April | 899.30 | 899.30 | 899.30 | — |
| May | 899.30 | 899.30 | 899.30 | — |
| June | 899.30 | 899.30 | 899.30 | — |
| July | 899.30 | 899.30 | 899.30 | — |
| August | 899.30 | 899.30 | 899.30 | — |
| September | 899.30 | 899.30 | 899.30 | — |
| October | 899.30 | 899.30 | 899.30 | — |
| November | 896.59 | 899.05 | 899.30 | — |
| December | 891.30 | 894.30 | 896.00 | — |
Other Ohio lakes, lowest first
| Lake | Level (ft) | Vs full pool |
|---|---|---|
| Deer Creek Lake | 803.50 | 1.4 ft above |
 Leesville Lake | 962.48 | 97.1% full |
 Atwood Lake | 927.63 | 6.2 ft above |
 East Fork Lake (William H. Harsha) | 730.10 | 26.6% full |
 Mosquito Creek Lake | 898.76 | At pool |
| Berlin Lake | 1,016.08 | At pool |
 Caesar Creek Lake | 846.89 | 29.4% full |
| Michael J. Kirwan Reservoir | 980.43 | At pool |
| Clendening Lake | 897.84 | 99.0% full |
 Charles Mill Lake | 996.78 | 95.8% full |
| Paint Creek Lake | 792.89 | 0.8 ft above |
 Piedmont Lake | 912.77 | 98.5% full |
| C. J. Brown Reservoir | 1,010.13 | 37.4% full |
 Alum Creek Lake | 886.51 | 1.5 ft below |
Tappan questions
What is full pool at Tappan Lake?
Full pool at Tappan Lake is 899.30 ft above sea level today. The Army Corps of Engineers changes it through the year, up to 899.30 ft in the high season. The agency's own term for it is “top of normal.”
Is Tappan Lake full right now?
Yes. At 898.98 ft it is within half a foot of full pool.
Is Tappan Lake lower than normal for early November?
Yes. The median level on Nov 4 across 2013–2025 is 899.30 ft, and today's 898.98 ft is −0.32 ft from it. In 8 of 10 years the level on this date fell between 899.30 and 899.30 ft.
How does Tappan Lake compare with last year?
A year ago, on November 4, 2025, it stood at 899.30 ft. It is 0.32 ft lower now.
What are the highest and lowest levels since 2013?
In the daily record we hold, which starts in 2013, the highest daily level was 899.38 ft on September 22, 2026 and the lowest was 891.30 ft on January 2, 2013.
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.