Outlook
Middle estimate, with the range the level has an 8 in 10 chance of landing in. The bars share one scale: change from today.
Rises are harder to call. Heavy rain in the watershed can push the lake above these ranges within days.
- Rain, past 7 days
- 0.7 in17 mm watershed average
- Rain forecast, next 7 days
- 1.7 in42 mm normal 0.4 in10 mm
Statistical estimate, not safety, boating, or water-quality advice. For ramps, closures and advisories, check the lake operator.
Map
Map of O. C. Fisher Lake with the dam, level gauge and 21 public boat ramps.
- Dam
- Level gauge
- Public boat ramp
Ramp locations from Texas Parks and Wildlife. Whether a ramp is open depends on the lake level; check the operator.
Level and outlook
FeetMeters above sea level
- Measured
- Middle estimate
- 8 in 10 range
- Full pool
Show outlook as a table
| Date | Low end | Middle | High end |
|---|---|---|---|
| Nov 2 | 1871.8570.51 | 1871.9570.56 | 1872.4570.71 |
| Nov 9 | 1871.7570.49 | 1871.9570.56 | 1872.8570.82 |
| Nov 25 | 1871.5570.45 | 1871.9570.54 | 1873.9571.16 |
How well this outlook has done here
We tested the 2-week outlook on past years at this lake, as if made once a week with only what was known that day.
- On average it was off by
- 0.29 ft0.09 m Assuming the level stays the same was off by 0.40 ft0.12 m
- Actual level inside our range
- 87% of 417 tests; the range is built to catch 8 in 10
The rise chance uses the same threshold for every lake: 1 ft (0.3048 m).
Connected lakes
Water from upstream lakes flows into this one; water released here flows on downstream.
Nearby lakes
Closest lakes in a straight line, with today's level.
- Lake Nasworthy7 mi11 km away · 1871.7 ft570.51 m · 86%
- Twin Buttes Reservoir8 mi13 km away · 1894.2 ft577.36 m · 4%
- E. V. Spence Reservoir27 mi44 km away · 1842.0 ft561.45 m · 9%
- Oak Creek Reservoir40 mi65 km away · 1973.2 ft601.44 m · 13%
- Hords Creek Lake59 mi95 km away · 1888.1 ft575.48 m · 45%
- Champion Creek Reservoir59 mi95 km away · 2063.8 ft629.03 m · 45%
About O. C. Fisher Lake
O. C. Fisher Lake is a U.S. Army Corps of Engineers reservoir on the North Concho River on the west side of San Angelo, impounded in 1952. Originally San Angelo Lake, it was renamed in 1975 for Congressman O. C. Fisher. It provides flood control and backup water supply, and San Angelo State Park surrounds much of the shoreline. Its outflow reaches O. H. Ivie Reservoir.
- Full pool (conservation)
- 1908.0 ft581.56 m
- Highest level since 2000
- 1879.4 ft572.84 m, Jul 2025
- Lowest level since 2000
- 1848.9 ft563.54 m, Jan 2014
- Surface area at normal pool
- 5,400 acres2,185 ha
- Conservation storage
- 115,742 acre-feet143 million m³
- Dam
- O.C. Fisher Dam, 1952
- River or creek
- Concho River
- County
- Tom Green
- Owner
- USACE - Fort Worth District
Elevations are feetmeters above sea level (NGVD29).
Common questions
Is O. C. Fisher Lake full right now?
On Oct 26 it was 1871.8 ft, 36.2 ft below full pool (1908.0 ft), holding 10% of its conservation storage.On Oct 26 it was 570.53 m, 11.03 m below full pool (581.56 m), holding 10% of its conservation storage.
Is O. C. Fisher Lake going up or down?
The middle estimate for Nov 9 is about steady, with an 8 in 10 chance it ends between 1871.7 ft and 1872.8 ft. The chance it ends 1 ft or more higher than today is 10%. Heavy rain can change that quickly.The middle estimate for Nov 9 is about steady, with an 8 in 10 chance it ends between 570.49 m and 570.82 m. The chance it ends 0.3 m or more higher than today is 10%. Heavy rain can change that quickly.
Where does this data come from?
Daily levels come from the Texas Water Development Board and lake operators. The outlook is our own statistical model, using recent levels and forecast rain over the watershed.