WashingtonReservoir, 14,361 acres, Chelan County, Douglas County, Grant County, Kittitas County
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568.09ft
Up 0.86 ft this week
Sailing
CheckingReading the forecast
Kayak and SUP
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Power boating
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Fishing
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Outlook. Monday: SSW wind 0 to 3 kt, gusts to 7 kt, high near 57°F. Tuesday: W wind 3 to 8 kt, gusts to 15 kt, high near 59°F.
7-day wind forecastLoads when you scroll here
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Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.
568.09ft above sea level
+0.86 ft in 7 days0.13 ft above the October normal
Reading from Oct 25, 2026. Shaded band: range of October averages on record; dashed line is the typical level.
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.
Background reading: Wanapum Lake on Wikipedia
Wanapum Lake is a 14,361-acre reservoir in Chelan County, Douglas County, Grant County, Kittitas County, Washington. The reservoir dates to 1959. The water surface sits about 571 ft above sea level.
Water level on this page comes from the U.S. Army Corps of Engineers reading at Wanapum Dam, published through the Corps' CWMS data service. Wind, gusts and rain come from the National Weather Service forecast grid that covers the water.
On a lake this size the wind has miles of open water to work with, so a 15 kt breeze can stack up a steep chop in the main basin while sheltered coves stay flat. Reservoir levels move with releases and inflow, so ramps and beaches can change week to week. The water level page tracks that day by day.
The go or no-go calls above are a starting point, not a guarantee. Read how we score conditions, and always check local rules and posted warnings before you launch.
The National Weather Service forecast for the lake from October 26: Monday: SSW wind 0 to 3 kt, gusts to 7 kt, high near 57°F. The panel at the top of this page refreshes the current wind, gusts and direction when you open it and turns them into a call for sailing, paddling, power boating and fishing.
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.
Wanapum Lake covers about 14,361 acres (22 square miles) of surface water.
The dam that forms Wanapum Lake was completed in 1959.
If Wanapum is blown out, these are the closest alternatives. Tap through for their conditions.