Medina River at San Antonio water level
River gauge, Medina River, Texas, United States
Right now
Low for mid-October
Water level
- Flow
- 58.6 cfs
- Water temperature
- 79 °F
History
20252026
What this means
Low water at Medina River at San Antonio: the gauge reads 3.03 ft, below normal for mid-October.
That puts it 0.83 ft below the median of 3.86 ft for mid-October, based on 37 years of readings. It is 16.97 ft below the flood stage of 20.00 ft. A year ago it stood at 2.75 ft (+0.28 ft).
The level has held steady over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. The 30-day range is 2.78 ft – 5.53 ft.
Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that. The sensor also reports a water temperature of 79 °F.
Compared with 37 years of daily readings for this time of year. How to read levels
Key numbers
- Median for this date
- 3.86 ft0.83 ft below the median for this date
- Normal for this date
- 3.01 ft – 6.95 ft8 years in 10 fall in this range (37 years of records)
- Same day last year
- 2.75 ft+0.28 ft
- Lowest and highest in 30 days
- 2.78 ft – 5.53 ft
- Lowest and highest in 12 months
- 2.76 ft – 15.11 ft
- Highest on record
- 55.65 ftJuly 4, 2002
Paddling and fishing conditions
At low levels, plan for shorter paddling trips and expect to walk your boat through a few shoals.
For reference, flood stage is 20.00 ft.
What happens at each level
- 28.00 ft
- Major flooding puts the Farm to Market 1937 bridge floor under eight feet of water. Flow approaches homes downstream near Losoya. Livestock are cut off and potentiallly drowned in the flood plain.
- 24.00 ft
- Moderate lowland flooding floods secondary roads and bridges making them dangerous to traffic.
- 20.00 ft
- Minor lowland flooding reaches the Farm to Market 1937 bridge floor.
- 16.00 ft
- Overbank conditions with water extending into lowest areas of the flood plain with no significant damage.
- 3.03 ft
- Right now
Impact statements from the U.S. National Weather Service.
Highest crests on record
Chance of at least minor flooding in October to December: 25 %.
| Rank | Level | Date |
|---|---|---|
| 1 | 55.65 ft | July 4, 2002 |
| 2 | 55.00 ft | July 1, 1900 |
| 3 | 49.47 ft | October 18, 1998 |
| 4 | 43.59 ft | July 17, 1973 |
| 5 | 41.57 ft | August 29, 1946 |
| 6 | 37.37 ft | June 5, 1987 |
| 7 | 32.37 ft | May 26, 2013 |
| 8 | 32.20 ft | July 1, 1936 |
| 9 | 30.16 ft | December 22, 1992 |
| 10 | 29.04 ft | June 14, 1981 |
Weather at the gauge
The forecast is not available right now.
Map
Other gauges on the Medina River
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| Medina River at Patterson Rd at MedinaRiver gauge, Medina River | 4.20 ft | Normal | −0.01 ft | 58 mi |
| Medina River at BanderaRiver gauge, Medina River | 3.58 ft | Normal | +0.02 ft | 47 mi |
| Medina River above English Crsg near Pipe CreekRiver gauge, Medina River | 19.3 cfs | Normal | −0.8 cfs | 42 mi |
| Medina River at La CosteRiver gauge, Medina River | 9.04 ft | Below flood stage | ±0 | 20 mi |
| Medina River near MacdonaRiver gauge, Medina River | −0.07 ft | Low | +0.04 ft | 13 mi |
| Medina River near SomersetRiver gauge, Medina River | 4.04 ft | Low | +0.01 ft | 5.5 mi |
Nearby gauges
| Gauge | Level | Compared with normal | 24 hours | Distance |
|---|---|---|---|---|
| San Antonio River at Loop 410, San AntonioRiver gauge, San Antonio River | 3.67 ft | Low | −0.03 ft | 4.7 mi |
| Leon Creek at IH 35, San AntonioRiver gauge, Leon Creek | 2.22 ft | Normal | +0.02 ft | 7 mi |
| Salado Creek at Loop 13, San AntonioRiver gauge, Salado Creek | 5.18 ft | Low | −0.02 ft | 8 mi |
| San Antonio River near ElmendorfRiver gauge, San Antonio River | 9.35 ft | Low | +0.06 ft | 9 mi |
| San Antonio River at Mitchell St, San AntonioRiver gauge, San Antonio River | 4.25 ft | Normal | −0.01 ft | 9 mi |
| San Pedro Creek at Furnish St, San AntonioRiver gauge, San Pedro Creek | 0.0 cfs | Very low | ±0 | 10 mi |
| San Antonio River at San AntonioRiver gauge, San Antonio River | 3.94 ft | Normal | ±0 | 10 mi |
| Leon Creek at Lp 410 at San AntonioRiver gauge, Leon Creek | 4.04 ft | Low | −0.02 ft | 15 mi |
Questions and answers
How does the Medina River at San Antonio compare with last year?
It is 0.28 ft higher than on the same day last year, when the reading was 2.75 ft.
What is flood stage for the Medina River at San Antonio?
The official flood stage is 20.00 ft. The level is currently 16.97 ft below it.
What is a normal level for the Medina River at San Antonio in mid-October?
The median for mid-October is 3.86 ft. In 8 years out of 10 the reading falls between 3.01 ft and 6.95 ft, based on 37 years of records.
Is gage height the same as water depth?
No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.
What is the water level of Medina River at San Antonio today?
On Oct 18, 2026, 10:15 PM CDT, the water level was 3.03 ft. Steady over the last 24 hours.
Is Medina River at San Antonio rising or falling?
Steady over the last 24 hours. Up 0.09 ft over the last 7 days.
Is the level of Medina River at San Antonio normal?
Low for mid-October. Compared with 37 years of daily readings for this time of year.
For specialists
Station codes, datum, parameters, data quality and downloads
- Operator
- U.S. Geological Survey
- Station code
usgs:08181500(Agency page)- Coordinates
29.26413, -98.49085(WGS84)- Vertical datum
- NAVD88
- Update interval
- every 15 minutes
- Licence
- Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision
Published series
| Parameter | Last value | Time (UTC) | Quality |
|---|---|---|---|
| Water level | 3.03 ft | 2026-10-19 03:15 | Provisional |
| Flow | 58.6 cfs | 2026-10-19 03:15 | Provisional |
| Water temperature | 79 °F | 2026-10-19 03:15 | Provisional |
Download
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How to cite
U.S. Geological Survey: Medina River at San Antonio (usgs:08181500). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/medina-river-at-san-antonio
How we check values
Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.
Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer