WyomingReservoir, 2,146 acres, Sublette County
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6,739.75ft
Up 1.03 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 1 to 5 kt, gusts to 13 kt, high near 49°F. Tuesday: WSW wind 4 to 14 kt, gusts to 26 kt, high near 47°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.
6,739.75ft NGVD29
+1.03 ft in 7 days5.04 ft below the October normal
Reading from Oct 26, 2026. Shaded band: range of October averages on record; dashed line is the typical level.
Big Sandy Reservoir was at 6,739.75 ft on October 26, rising 1.03 ft over the past week. That is below normal for October: the typical October level is 6,744.79 ft, so the lake is 5.04 ft below its usual mark.
Big Sandy Reservoir is a 2,146-acre reservoir in Sublette County, Wyoming. The water surface sits about 6,762 ft above sea level.
We read the level from USGS gauge 09213700, listed as Big Sandy Reservoir near Farson, WY. 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. At about 6,762 ft, summer afternoons often bring building wind and quick thunderstorms, and the water stays cold well into the season. 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 1 to 5 kt, gusts to 13 kt, high near 49°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.
Big Sandy Reservoir was at 6,739.75 ft on October 26, rising 1.03 ft over the past week. That is below normal for October: the typical October level is 6,744.79 ft, so the lake is 5.04 ft below its usual mark.
Big Sandy Reservoir covers about 2,146 acres (3.4 square miles) of surface water.
If Big Sandy is blown out, these are the closest alternatives. Tap through for their conditions.