Water level
736.59ft above sea level
+0.17 ft in 7 daysOct 12Oct 19Oct 26
Sep 26Oct 11Oct 26
Reading from Oct 26, 2026.
Lower Granite Lake was at 736.59 ft on October 26, rising 0.17 ft over the past week.
WashingtonReservoir, Asotin County, Whitman County
Lower Granite Lake conditions today
Right now on Lower Granite
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Best window
0pm to 0pm
score
Wind
00kt
Gusts 00
Direction
NE
Blowing from
Air temp
00°F
High
Rain
Dry%
next 6 hours
Water level
736.59ft
Up 0.17 ft this week
Sailing
CheckingReading the forecast
Kayak and SUP
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Power boating
CheckingReading the forecast
Fishing
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Hour by hour
Next 24 hours
Wind and gusts0 to 30+ ktScoreGood, caution, stay ashoreNightBest windowArrows point where the wind blows to.
Outlook. Monday: W wind 1 to 5 kt, gusts to 10 kt, high near 51°F, 84% chance of rain. Tuesday: SW wind 6 to 9 kt, gusts to 17 kt, high near 53°F.
7-day wind forecastLive radar
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LightHeavy
Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.
Lake facts
- Type
- Reservoir
- State
- Washington
- County
- Asotin County, Whitman County
- Level source
- U.S. Army Corps of Engineers, Lower Granite Lock and Dam
- Coordinates
- 46.6604° N, 117.4280° W
Background reading: Lower Granite Lake on Wikipedia
About Lower Granite Lake
Lower Granite Lake covers a stretch of water in Asotin County, Whitman County, Washington and is classed as a reservoir.
Water level on this page comes from the U.S. Army Corps of Engineers reading at Lower Granite Lock and Dam, published through the Corps' CWMS data service. Wind, gusts and rain come from the National Weather Service forecast grid that covers the water.
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.
Lower Granite Lake questions
Is it windy on Lower Granite Lake today?
The National Weather Service forecast for the lake from October 26: Monday: W wind 1 to 5 kt, gusts to 10 kt, high near 51°F, 84% 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.
What is the water level at Lower Granite Lake right now?
Lower Granite Lake was at 736.59 ft on October 26, rising 0.17 ft over the past week.
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