Cottage Grove Lake Water Level
Oregon · updated daily from the U.S. Geological Survey
776.91 ft
Cottage Grove Lake is current reading available and falling (-1.02 ft in the last 7 days).
Change since yesterday: -0.12 ft
Reading as of 2026-08-15
Where Cottage Grove Lake sits historically
Today's level compared with every reading in our 0.3-year record for this lake.
Since yesterday
-0.12 ft
7-day change
-1.02 ft
30-day change
-4.01 ft
1-year change
— ft
Last 30 days
Last 12 months
Cottage Grove Lake records and averages
| Current level | 776.91 ft |
|---|---|
| Record high | 786.86 ft (2026-05-07) |
| Record low | 776.91 ft (2026-08-15) |
| Average of all readings | 783.31 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Cottage Grove Lake full right now?
As of 2026-08-15, Cottage Grove Lake sits at 776.91 ft, which is current reading available.Over the past 30 days the level has fallen 4.01 ft.
What is the water level at Cottage Grove Lake today?
The most recent reading is 776.91 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 Cottage Grove Lake has ever been?
The highest level in our records is 786.86 ft on 2026-05-07. The lowest is 776.91 ft on 2026-08-15. Our record covers about 0.3 years of readings.
Why is Cottage Grove Lake low 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. Cottage Grove Lake has fallen 4.01 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.
How much has Cottage Grove Lake 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 786.86 ft and a record low of 776.91 ft.
Nearby lakes in Oregon
Source: the U.S. Geological Survey. Readings are provisional and subject to revision by the publishing agency. All Oregon lake levels.