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lakeglance

WashingtonReservoir, 14,361 acres, Chelan County, Douglas County, Grant County, Kittitas County

Wanapum Lake water level

Wanapum Lake, Washington
Photo: Williamborg 01:57, 28 April 2008 (UTC), Public domain

Current level

568.09ft above sea level

Reading from Oct 25, 2026

Near normal for October

Past 24 hours
+0.45ft
Past 7 days
+0.86ft
Past 30 days
+0.33ft
vs typical October
+0.13ft

Wanapum Lake was at 568.09 ft on October 25, rising 0.86 ft over the past week. That is near normal for October: the typical October level is 567.96 ft, so the lake is 0.13 ft above its usual mark.

Last 30 days

566.0567.0568.0569.0typicalSep 26Oct 11Oct 26

Shaded band shows the lowest and highest October monthly averages on record. Dashed line is the typical October level.

Typical level through the year

Each bar spans the range of monthly averages on record for that month. The line marks the median. The orange dot is where the lake sits now.

560565570JFMAMJJASOND

Recent daily readings

Wanapum Lake daily mean water level, newest first
DateLevel (ft above sea level)Change
Oct 26, 2026568.19+0.55
Oct 25, 2026567.64+0.86
Oct 24, 2026566.78-1.24
Oct 23, 2026568.02+0.44
Oct 22, 2026567.58+1.14
Oct 21, 2026566.44-1.39
Oct 20, 2026567.83+0.60
Oct 19, 2026567.23+0.62
Oct 18, 2026566.61-0.71
Oct 17, 2026567.32+0.26
Oct 16, 2026567.06+0.82
Oct 15, 2026566.24+0.07
Oct 14, 2026566.17-1.30
Oct 13, 2026567.47+0.59

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.

Reservoir levels are managed. Operators lower them ahead of flood season, hold them for summer recreation, and draw them down for dam work. When the lake falls well below its usual level, shallow points and stumps start showing up in places that are normally safe.

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 Wanapum 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.

Wanapum Lake water level questions

What is the water level at Wanapum Lake today?

Wanapum Lake was at 568.09 ft on October 25, rising 0.86 ft over the past week. That is near normal for October: the typical October level is 567.96 ft, so the lake is 0.13 ft above its usual mark.

Is Wanapum Lake high or low right now?

Compared with the long-term record for October, the lake is near normal. The October monthly average has ranged from 560.22 to 569.98 ft, with a typical value of 567.96 ft.

Is Wanapum Lake rising or falling?

Over the last seven days the level has risen (+0.86 ft), and it is +0.33 ft compared with 30 days ago.

Where does the Wanapum Lake water level data come from?

From the U.S. Army Corps of Engineers reading at Wanapum 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 Wanapum is blown out, these are the closest alternatives. Tap through for their water levels.