Water level
Lake Merwin water level
Lake Merwin is at 233.00 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 14219950.
| Date | Elevation (ft) | Change |
|---|---|---|
| 2026-09-08 | 233.19 | -0.27 |
| 2026-09-07 | 233.46 | -0.12 |
| 2026-09-06 | 233.58 | -0.42 |
| 2026-09-05 | 234.00 | +0.00 |
| 2026-09-04 | 234.00 | +0.00 |
| 2026-09-03 | 234.00 | -0.81 |
| 2026-09-02 | 234.81 | -0.19 |
| 2026-09-01 | 235.00 |
What this level means
Station 14219950, LAKE MERWIN NEAR CHELATCHIE, WA, publishes the water surface elevation used here. Over the record shown on the level page the gauge has moved between 221.96 ft and 238.92 ft (low on 2025-09-29, high on 2026-04-27). The last value stored here, 233.00 ft, is from 2026-09-09. A falling pool widens the beaches and shortens the ramps, so it is worth checking before you drive out.
How this reading is taken
USGS gauge 14219950 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 Lake Merwin 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 Lake Merwin?
The latest reading is 233.00 ft, from USGS gauge 14219950.
Sources
Every figure on this page comes from one of these public sources.