Foss Reservoir Water Level
Oklahoma · updated daily from the U.S. Bureau of Reclamation
1638.88 ft
Foss Reservoir is current reading available and falling (-0.26 ft in the last 7 days).
Change since yesterday: -0.02 ft
Reading as of 2026-08-15
Where Foss Reservoir 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
-0.26 ft
30-day change
-0.93 ft
1-year change
— ft
Last 30 days
Last 12 months
Foss Reservoir records and averages
| Current level | 1638.88 ft |
|---|---|
| Record high | 1641.06 ft (2026-04-18) |
| Record low | 1638.88 ft (2026-08-15) |
| Average of all readings | 1640.19 ft |
| Data span | 0.3 years (121 readings) |
Frequently asked questions
Is Foss Reservoir full right now?
As of 2026-08-15, Foss Reservoir sits at 1638.88 ft, which is current reading available.Over the past 30 days the level has fallen 0.93 ft.
What is the water level at Foss Reservoir today?
The most recent reading is 1638.88 ft (2026-08-15), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Foss Reservoir has ever been?
The highest level in our records is 1641.06 ft on 2026-04-18. The lowest is 1638.88 ft on 2026-08-15. Our record covers about 0.3 years of readings.
Why is Foss Reservoir 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. Foss Reservoir has fallen 0.93 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 Foss Reservoir 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 1641.06 ft and a record low of 1638.88 ft.
Nearby lakes in Oklahoma
Source: the U.S. Bureau of Reclamation. Readings are provisional and subject to revision by the publishing agency. All Oklahoma lake levels.