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WashingtonReservoir, 8,146 acres, Franklin County

Lake Sacajawea conditions today

Lake Sacajawea, Washington
Photo: Wikimedia Commons, Public domain

Right now on Sacajawea

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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

439.08ft

Up 0.11 ft this week

Sailing

Checking

Reading the forecast

Kayak and SUP

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Reading the forecast

Power boating

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Fishing

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Reading the forecast

Hour by hour

Next 24 hours
Wind and gusts0 to 30+ ktScoreGood, caution, stay ashoreNightBest windowArrows point where the wind blows to.

Outlook. Monday: SSW wind 3 to 7 kt, gusts to 14 kt, high near 57°F. Tuesday: SW wind 7 to 12 kt, gusts to 22 kt, high near 59°F.

7-day wind forecast

Live radar

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LightHeavy

Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.

Water level

Full report

439.08ft above sea level

+0.11 ft in 7 days
Sep 26Oct 11Oct 26

Reading from Oct 26, 2026.

Lake Sacajawea was at 439.08 ft on October 26, rising 0.11 ft over the past week.

Lake facts

Type
Reservoir
State
Washington
County
Franklin County
Surface area
8,146 acres
Dam completed
1956
Operator
United States Army Corps of Engineers
Level source
U.S. Army Corps of Engineers, Ice Harbor Lock and Dam
Coordinates
46.2497° N, 118.8796° W

Background reading: Lake Sacajawea on Wikipedia

About Lake Sacajawea

Set in Franklin County, Washington, Lake Sacajawea is a 8,146-acre reservoir. Its dam was completed in 1956, and the lake is operated by United States Army Corps of Engineers.

Water level on this page comes from the U.S. Army Corps of Engineers reading at Ice Harbor 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.

Mid-sized lakes like this one tend to have shifty, gusty wind near shore and steadier pressure in the middle, which is why gust spread matters as much as average speed. 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.

Lake Sacajawea questions

Is it windy on Lake Sacajawea today?

The National Weather Service forecast for the lake from October 26: Monday: SSW wind 3 to 7 kt, gusts to 14 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.

What is the water level at Lake Sacajawea right now?

Lake Sacajawea was at 439.08 ft on October 26, rising 0.11 ft over the past week.

How big is Lake Sacajawea?

Lake Sacajawea covers about 8,146 acres (13 square miles) of surface water.

Who manages Lake Sacajawea?

Lake Sacajawea is operated by United States Army Corps of Engineers. Boating rules, closures and ramp hours come from the operator and the state wildlife agency.

When was Lake Sacajawea built?

The dam that forms Lake Sacajawea was completed in 1956.

Nearby lakes

If Sacajawea is blown out, these are the closest alternatives. Tap through for their conditions.