American Falls Reservoir water level today
Reservoir in Idaho
4,314.54ft
1,315.07 m · NAVD88
Measured · provisional
24 hours
▲ 0.42 ft
7 days
▲ 3.31 ft
30 days
–
What this means
The lake has risen 3.31 ft in 7 days.
Since 2026, the lowest daily level was 4,309.18 ft (Oct 2026) and the highest 4,314.54 ft (Oct 2026).
American Falls Reservoir level chart
Loading chart…
Measured
Normal range for the date (middle 50% of past years)
Records & details
- Highest
- 4,314.54 ft on Oct 21, 2026
- Lowest
- 4,309.18 ft on Oct 7, 2026
- Records from
- 2026 (0 years of daily data)
- Storage
- 175,187 acre-ft
- Water temperature
- Not measured here
American Falls Dam
- Height
- 104 ft
- Completed
- 1927
- Purposes
- Flood Risk Reduction; Fire Protection, Stock, Or Small Fish Pond; Fish and Wildlife Pond; Recreation
- Owner
- BUREAU OF RECLAMATION
- Normal storage
- 1,671,300 acre-ft
- Surface area
- 58,076 acres
National Inventory of Dams (U.S. Army Corps of Engineers). All dam facts →
Boat ramps on American Falls Reservoir
4 ramps without a name, on the map: 1234
4 ramps listed. Links open the ramp's location on OpenStreetMap. Check the managing agency for closures, especially at low water. All Idaho boat ramps →
Campgrounds near American Falls Reservoir
- Pipeline Campground
Federal campgrounds from Recreation.gov; straight-line distance from the lake's gauge or dam.
Weather & wind
Today52°F · Showers And Thunderstorms then Rain
Wind SW 18 to 24 mph
Wind SW 18 to 24 mph
Tonight37°F · Light Rain Likely then Mostly Cloudy
Wind WSW 7 to 17 mph
Wind WSW 7 to 17 mph
Saturday53°F · Mostly Sunny
Wind NNW 6 mph
Wind NNW 6 mph
Saturday Night35°F · Mostly Clear
Wind NE 3 mph
Wind NE 3 mph
Sunday56°F · Sunny
Wind NNE 3 mph
Wind NNE 3 mph
Sunday Night38°F · Mostly Clear
Wind ESE 1 to 8 mph
Wind ESE 1 to 8 mph
NOAA National Weather Service forecast for this lake's location, updated 2 h ago.