Lake Tapps Water Level
Washington · updated daily from the U.S. Geological Survey
541.18 ft
Lake Tapps is current reading available and steady (+0.11 ft in the last 7 days).
Change since yesterday: +0.02 ft
Reading as of 2026-08-15
Where Lake Tapps sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
+0.02 ft
7-day change
+0.11 ft
30-day change
-0.52 ft
1-year change
— ft
Last 30 days
Last 12 months
Lake Tapps records and averages
| Current level | 541.18 ft |
|---|---|
| Record high | 542.98 ft (2026-05-02) |
| Record low | 541.05 ft (2026-08-07) |
| Average of all readings | 542.29 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Lake Tapps full right now?
As of 2026-08-15, Lake Tapps sits at 541.18 ft, which is current reading available.Over the past 30 days the level has fallen 0.52 ft.
What is the water level at Lake Tapps today?
The most recent reading is 541.18 ft (2026-08-15), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Lake Tapps has ever been?
The highest level in our records is 542.98 ft on 2026-05-02. The lowest is 541.05 ft on 2026-08-07. Our record covers about 0.3 years of readings.
Why is Lake Tapps changing right now?
Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Lake Tapps has fallen 0.52 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Lake Tapps changed over the past year?
Year-over-year comparison is not available for this lake yet. The full-history chart above covers 0.3 years, with a record high of 542.98 ft and a record low of 541.05 ft.
Nearby lakes in Washington
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Washington lake levels.