Lake levels
Henrys Lake, ID
- gauge height
- 12.81 ft
- Condition
- Low for this time of year
- 7-day change
- -0.01 ft
- 30-day change
- -0.41 ft
- 1-year change
- -1.74 ft
Reading as of 2026-09-30 | the U.S. Bureau of Reclamation
- Since yesterday
- +0.01 ft
- 7-day change
- -0.01 ft
- 30-day change
- -0.41 ft
- 1-year change
- -1.74 ft
- Record high
- 17.16 ft
In brief
Henrys Lake's gauge read 12.81 feet on Sep 30, 2026. That is lower than 88% of September readings since 2022.
Source: U.S. Bureau of Reclamation
Gauge height above a local reference point; not elevation above sea level.
Lake level timeline
Records and averages
| Current level | 12.81 ft |
|---|---|
| Record high | 17.16 ft (2023-06-19) |
| Record low | 12.65 ft (2026-09-06) |
| Average of all readings | 15.54 ft |
| Data span | 4 years (2,000 readings) |
Level schematic
Trout stocking on Henrys Lake
IDFG stocked Henrys Lake 5 times in 2026, 1,459,307 fish in total. Cutbow - Cutthroat x Rainbow Trout - Triploid and Brook Trout - Triploid and Cutthroat Trout - Yellowstone at Fingerling (3-6 inches) and Fry (0-3 inches). IDFG's published figures for 2026, the most recent season it has confirmed, record 1,459,307 trout actually released here across 5 visits.
| Species | Fish | When |
|---|---|---|
| Cutbow - Cutthroat x Rainbow Trout - Triploid | 19,215 | May 2026 |
| Brook Trout - Triploid | 114,810 | September 2026 |
| Cutbow - Cutthroat x Rainbow Trout - Triploid | 257,850 | September 2026 |
| Cutthroat Trout - Yellowstone | 746,436 | September 2026 |
| Cutthroat Trout - Yellowstone | 320,996 | September 2026 |
IDFG lists a week or a month rather than a date, and counts fish as an estimate. Full Idaho stocking schedule →
Frequently asked questions
Is Henrys Lake full right now?
As of 2026-09-30, Henrys Lake sits at 12.81 ft, which is low for this time of year. Over the past 30 days the level has fallen 0.41 ft.
What is the water level at Henrys Lake today?
The most recent reading at Henrys Lake is 12.81 ft (2026-09-30), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.
What is the highest Henrys Lake has ever been?
The highest level for Henrys Lake in our records is 17.16 ft on 2023-06-19. The lowest is 12.65 ft on 2026-09-06. Our record covers about 4 years of readings.
Is Henrys Lake low for this time of year?
Compared with every September in our records, the current level is higher than 12% of them, which we classify as low 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 Henrys Lake 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. Henrys Lake has fallen 0.41 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 Henrys Lake changed over the past year?
Henrys Lake is -1.74 ft compared with this date last year (12.81 ft today). The full-history chart above covers 4 years, with a record high of 17.16 ft and a record low of 12.65 ft.
Download and cite
Quote this reading
Henrys Lake's gauge read 12.81 feet on Sep 30, 2026. That is lower than 88% of September readings since 2022.
Download the full record
henrys-lake-id-water-level-history.csv
How to cite
MyWaterLevel, “Henrys Lake water level, 2022 to 2026,” data from U.S. Bureau of Reclamation, https://mywaterlevel.com/lake/id/henrys-lake/, accessed Oct 13, 2026.
Source: the U.S. Bureau of Reclamation. All Idaho lake levels. Readings are provisional and may be revised. About our data and methods.