WashingtonReservoir, Asotin County, Whitman County
Lower Granite Lake water level
Current level
736.59ft above sea level
Reading from Oct 26, 2026
- Past 24 hours
- -0.10ft
- Past 7 days
- +0.17ft
- Past 30 days
- -0.31ft
- Trend
- Rising
Lower Granite Lake was at 736.59 ft on October 26, rising 0.17 ft over the past week.
Last 30 days
Recent daily readings
| Date | Level (ft above sea level) | Change |
|---|---|---|
| Oct 26, 2026 | 736.60 | -0.09 |
| Oct 25, 2026 | 736.69 | +0.12 |
| Oct 24, 2026 | 736.57 | +0.29 |
| Oct 23, 2026 | 736.28 | +0.14 |
| Oct 22, 2026 | 736.14 | -0.21 |
| Oct 21, 2026 | 736.35 | -0.13 |
| Oct 20, 2026 | 736.48 | +0.06 |
| Oct 19, 2026 | 736.42 | +0.29 |
| Oct 18, 2026 | 736.13 | +0.16 |
| Oct 17, 2026 | 735.97 | -0.04 |
| Oct 16, 2026 | 736.01 | +0.09 |
| Oct 15, 2026 | 735.92 | +0.01 |
| Oct 14, 2026 | 735.91 | -0.24 |
| Oct 13, 2026 | 736.15 | -0.33 |
Reading these numbers
Readings are reservoir surface elevations in feet, as published by the U.S. Army Corps of Engineers. Compare them with ramp and dock elevations from the lake operator to judge whether a launch is usable.
On a reservoir, a few feet of drop changes the shoreline more than you would think. Low water exposes stumps, sandbars and old roadbeds that are normally well under the hull, and some ramps end before the water does.
High water brings its own problems: floating debris after storms, flooded docks and courtesy piers, and no-wake rules near flooded campgrounds. A quick look at the trend before you hitch up saves a wasted trip.
The gauge is listed by USACE as Lower Granite Lock and Dam. Wind can pile water up at one end of a big lake for a few hours, so short spikes on a windy day are normal.
Lower Granite Lake water level questions
What is the water level at Lower Granite Lake today?
Lower Granite Lake was at 736.59 ft on October 26, rising 0.17 ft over the past week.
Is Lower Granite Lake rising or falling?
Over the last seven days the level has risen (+0.17 ft), and it is -0.31 ft compared with 30 days ago.
Where does the Lower Granite Lake water level data come from?
From the U.S. Army Corps of Engineers reading at Lower Granite Lock and Dam. The Corps reports pool elevation, usually every hour, and early values can be revised after review.
How often is this page updated?
The page itself is rebuilt every day with the latest daily values, and the current reading refreshes straight from the Corps of Engineers each time you open it.
Nearby lakes
If Lower Granite is blown out, these are the closest alternatives. Tap through for their water levels.