Lake Sammamish lake and shoreline

Lake Sammamish Water Level

Washington

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Lake Sammamish is currently at a water-surface elevation of 25.7 feet.

25.68 ft · Updated 2 hours ago · U.S. Geological Survey (USGS)

Current level

25.68ft

Status unavailable

A verified operating range is not available for this lake.

Since last reading

Down 0.01 ft

Previous readingSep 925.7 ft

7-day change

Down 0.01 ft

7-day trend: Stable

4 daily readings in the last 7 days

30-day change

Down 0.01 ft

4 daily readings in the last 30 days

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Water Level History

Elevation (ft) Water-surface elevation (ft)

26 ft26 ft26 ftSep 8Sep 11

Level status

Summary updating

This comparison needs the current level and full pool. We use the live feed when present, otherwise the latest daily summary when it includes a pool comparison.

DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).
Water-surface elevation (ft)
Elevation reference
Not available
Source
U.S. Geological Survey (USGS)

Reference levels

No published reference elevations for this lake.

Watershed drought

Abnormally Dry

43.9% of watershed in official drought (D1+).

Severity

NoneExtreme
Trend
Stable

Watershed drought conditions

King County, WA

Abnormally Dry

Abnormally Dry. The surrounding county is abnormally dry, which is not official drought.. Trend: Stable compared with last week. Official drought yes

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought

Yes

43.9% of the watershed is currently classified as official drought (D1+).

U.S. Drought Monitor · map date Sep 8, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for King County, WA

Daily level summary

  • Sep 10, 2026

    25.69 ft

    -0.01 ft

  • Sep 9, 2026

    25.7 ft

    +0.01 ft

  • Sep 8, 2026

    25.69 ft

    -0.01 ft

  • Sep 7, 2026

    25.7 ft

    —

Common questions about Lake Sammamish’s water level

  • The current water level at Lake Sammamish is 25.68 ft (updated 2 hours ago). You can track the Lake Sammamish lake level on the interactive chart and daily history above.

  • Over the past seven days the Lake Sammamish lake level has held relatively steady — the current 7-day trend is Stable. The history chart above shows the full trend.

  • Readings refresh when U.S. Geological Survey (USGS) publishes new gauge data — typically daily for most reservoirs. The timestamp above the chart shows when the latest observation arrived on Lake Insights.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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