Lake Sammamish lake and shoreline

Lake Sammamish Water Level

Washington

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Lake Sammamish

Lake Sammamish is currently at a water-surface elevation of 25.9 feet.

25.95 ft · Updated 6 hours ago · U.S. Geological Survey (USGS)

Current level

25.95ft

Status unavailable

Since last reading

No meaningful change

Previous readingOct 2425.96 ft

7-day change

No meaningful change

7-day trend: Stable

8 daily readings in the last 7 days

30-day change

Up 0.08 ft

30 daily readings in the last 30 days

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Water Level History

Current
25.95 ft
24h
0.00 ft
7d
0.00 ft
30d
+0.08 ft

Elevation (ft) Water-surface elevation (ft)

Reference line is designed full pool.

Water Temperature

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Lake Level Context

Current lake level

Lake Sammamish is currently 25.95 ft. The lake has changed little over the past 7 days and risen 0.08 ft over the past 30 days.

Lake Sammamish Level Details

Reference elevations, recent daily readings, data sources, and answers to common questions.

Conditions & Reference

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.

Surrounding county drought

Abnormally Dry

14.5% of surrounding county in official drought (D1–D4).

Severity

NoneExtreme
Trend
Stable

Surrounding county drought

King County, WA

Abnormally Dry

Abnormally Dry. The largest share of King County, WA is Abnormally Dry (D0). 14.5% of the county is still in Moderate Drought or worse (D1–D4), which the U.S. Drought Monitor treats as official drought. These figures describe the surrounding county from the lake location, not the lake itself.. Trend: Stable compared with last week. Official drought (D1–D4) yes

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought (D1–D4)

Yes

14.5% of the surrounding county is in official drought categories (D1–D4). Dominant category remains Abnormally Dry.

U.S. Drought Monitor · map date Oct 20, 2026. Updated weekly. Official drought means U.S. Drought Monitor categories D1–D4 (Moderate through Exceptional). Abnormally Dry (D0) is not counted as official drought. droughtmonitor.unl.eduView drought map for King County, WA

Daily level summary

DateLevelChange
Oct 25, 202625.960
Oct 24, 202625.96+0.01
Oct 23, 202625.950
Oct 22, 202625.950
Oct 21, 202625.950
Oct 20, 202625.950
Oct 19, 202625.95-0.01

Common questions about Lake Sammamish’s water level

  • The current water level at Lake Sammamish is 25.95 ft (updated 6 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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