Lake Walcott Water Level
Idaho · updated daily from the U.S. Bureau of Reclamation
4243.90 ft
Lake Walcott is below average for this time of year and steady (-0.03 ft in the last 7 days).
Change since yesterday: +0.04 ft
Reading as of 2026-08-14 · higher than 38% of August readings on record
Where Lake Walcott sits historically
Today's level compared with every reading in our 4.5-year record for this lake.
Since yesterday
+0.04 ft
7-day change
-0.03 ft
30-day change
-0.29 ft
1-year change
+0.56 ft
Last 30 days
Last 12 months
Full history (4.5 years)
Lake Walcott records and averages
| Current level | 4243.90 ft |
|---|---|
| Record high | 4245.14 ft (2024-05-27) |
| Record low | 4238.75 ft (2025-10-15) |
| Average of all readings | 4243.13 ft |
| Data span | 4.5 years (1,998 readings) |
Frequently asked questions
Is Lake Walcott full right now?
As of 2026-08-14, Lake Walcott sits at 4243.90 ft, which is below average for this time of year.Over the past 30 days the level has fallen 0.29 ft.
What is the water level at Lake Walcott today?
The most recent reading is 4243.90 ft (2026-08-14), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Lake Walcott has ever been?
The highest level in our records is 4245.14 ft on 2024-05-27. The lowest is 4238.75 ft on 2025-10-15. Our record covers about 4.5 years of readings.
Is Lake Walcott low for this time of year?
Compared with every August in our records, the current level is higher than 38% of them — below average for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.
Why is Lake Walcott 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 Walcott has fallen 0.29 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.
How much has Lake Walcott changed over the past year?
The level is +0.56 ft compared with this date last year (4243.90 ft today). The full-history chart above covers 4.5 years, with a record high of 4245.14 ft and a record low of 4238.75 ft.
Nearby lakes in Idaho
Source: the U.S. Bureau of Reclamation. Readings are provisional and subject to revision by the publishing agency. All Idaho lake levels.