Water level
Tappan Lake water level
Tappan Lake is at 899.35 ft as of Sep 9, 2026. Live readings, trend, history and what the level means for swimming and boat ramps.
Recent readings
Daily values from USGS gauge 03128000.
| Date | Elevation (ft) | Change |
|---|---|---|
| 2026-09-08 | 899.36 | -0.04 |
| 2026-09-07 | 899.40 | -0.03 |
| 2026-09-06 | 899.43 | -0.01 |
| 2026-09-05 | 899.44 | -0.01 |
| 2026-09-04 | 899.45 | -0.04 |
| 2026-09-03 | 899.49 | -0.03 |
| 2026-09-02 | 899.52 | -0.03 |
| 2026-09-01 | 899.55 |
What this level means
Station 03128000, Tappan Lake at Tappan OH, publishes the water surface elevation used here. The last value stored here, 899.35 ft, is from 2026-09-09. Over the record shown on the level page the gauge has moved between 894.33 ft and 901.35 ft (low on 2026-01-24, high on 2026-05-26). Beach width and ramp access both move with the pool, so the number above is worth a look first.
How this reading is taken
USGS gauge 03128000 measures the water surface and publishes the value continuously. This page stores the latest reading at build time and refreshes the record daily, so the figure above is a real measurement rather than a model or an estimate.
No operating agency publishes a full pool elevation for Tappan Lake that we can cite, so this page shows the reading and its trend without a percentage.
Elevations are given in feet above the gauge datum used by the operating agency. Two lakes are only comparable with each other through how full they are, not through their raw elevation, because each dam sits at a different height.
Water level questions
What is the current water level at Tappan Lake?
The latest reading is 899.35 ft, from USGS gauge 03128000.
Sources
Every figure on this page comes from one of these public sources.