WashingtonReservoir, 5,776 acres, Okanogan County
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55°F
Cold-water caution
Sailing
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Kayak and SUP
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Power boating
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Fishing
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Outlook. Monday: NNE wind 1 to 3 kt, gusts to 5 kt, high near 55°F, 81% chance of rain. Tuesday: S wind 0 to 3 kt, gusts to 5 kt, high near 53°F, 74% 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.
911.00ft NGVD29
+0.06 ft in 7 days0.20 ft below the October normal
Reading from Oct 26, 2026. Shaded band: range of October averages on record; dashed line is the typical level.
Osoyoos Lake was at 911.00 ft on October 26, holding steady over the past week (+0.06 ft). That is below normal for October: the typical October level is 911.20 ft, so the lake is 0.20 ft below its usual mark. The gauge also reports a water temperature of 55°F.
Background reading: Osoyoos Lake on Wikipedia
Osoyoos Lake covers about 5,776 acres in Okanogan County, Washington and is classed as a reservoir. The water surface sits about 909 ft above sea level.
We read the level from USGS gauge 12439000, listed as Osoyoos Lake near Oroville, 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: NNE wind 1 to 3 kt, gusts to 5 kt, high near 55°F, 81% chance of rain. 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.
Osoyoos Lake was at 911.00 ft on October 26, holding steady over the past week (+0.06 ft). That is below normal for October: the typical October level is 911.20 ft, so the lake is 0.20 ft below its usual mark. The gauge also reports a water temperature of 55°F.
Osoyoos Lake covers about 5,776 acres (9.0 square miles) of surface water.
If Osoyoos is blown out, these are the closest alternatives. Tap through for their conditions.