WashingtonReservoir, 2,199 acres, Skagit County
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415.42ft
Up 1.13 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: W wind 1 to 7 kt, gusts to 7 kt, high near 55°F. Tuesday: SSW wind 1 to 3 kt, gusts to 8 kt, high near 50°F, 99% chance of rain.
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.
415.42ft NAVD88
+1.13 ft in 7 days13.55 ft below the October normal
Reading from Oct 25, 2026. Shaded band: range of October averages on record; dashed line is the typical level.
Lake Shannon was at 415.42 ft on October 25, rising 1.13 ft over the past week. That is below normal for October: the typical October level is 428.97 ft, so the lake is 13.55 ft below its usual mark.
Background reading: Lake Shannon on Wikipedia
Set in Skagit County, Washington, Lake Shannon is a 2,199-acre reservoir. The reservoir dates to 2010. The surface sits about 436 ft above sea level and the deepest point is roughly 279 ft down.
We read the level from USGS gauge 12193000, listed as Lake Shannon at Concrete, WA. Wind and weather come from the National Weather Service grid cell over the lake, so the numbers describe open water rather than the nearest airport.
It is big enough for a proper sail but small enough that waves rarely get serious. Gusts off the shoreline are usually the bigger story than wave height. 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: W wind 1 to 7 kt, gusts to 7 kt, high near 55°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.
Lake Shannon was at 415.42 ft on October 25, rising 1.13 ft over the past week. That is below normal for October: the typical October level is 428.97 ft, so the lake is 13.55 ft below its usual mark.
Lake Shannon covers about 2,199 acres (3.4 square miles) of surface water.
The deepest point of Lake Shannon is roughly 279 ft.
The dam that forms Lake Shannon was completed in 2010.
If Shannon is blown out, these are the closest alternatives. Tap through for their conditions.