Water level
Lake Sammamish water level
Lake Sammamish is at 25.71 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 12122000.
| Date | Elevation (ft) | Change |
|---|---|---|
| 2026-09-08 | 25.70 | +0.00 |
| 2026-09-07 | 25.70 | -0.01 |
| 2026-09-06 | 25.71 | +0.00 |
| 2026-09-05 | 25.71 | +0.00 |
| 2026-09-04 | 25.71 | +0.00 |
| 2026-09-03 | 25.71 | +0.00 |
| 2026-09-02 | 25.71 | +0.00 |
| 2026-09-01 | 25.71 |
What this level means
The level comes from gauge 12122000, SAMMAMISH LAKE NEAR REDMOND, WA, and carries the time it was taken. The last value stored here, 25.71 ft, is from 2026-09-09. Over the record shown on the level page the gauge has moved between 25.61 ft and 29.00 ft (low on 2025-09-20, high on 2025-12-18). A low pool exposes stumps and mud in the shallow arms of the lake.
How this reading is taken
USGS gauge 12122000 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 Sammamish 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 Sammamish?
The latest reading is 25.71 ft, from USGS gauge 12122000.
Sources
Every figure on this page comes from one of these public sources.