San Antonio River at Loop 410, San Antonio water level

Name: San Antonio River at Loop 410, San Antonio water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, San Antonio River, Texas, United States

Directions

Low for mid-October

Water level

3.67ft Down 0.04 ft over the last 24 hours

Measured Oct 19, 2026, 12:15 AM CDT (42 min ago)

Flow: 16.3 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

At 3.67 ft, the San Antonio River at Loop 410, San Antonio is below normal for mid-October.

That puts it 1.43 ft below the median of 5.10 ft for mid-October, based on 34 years of readings. It is 8.33 ft below the flood stage of 12.00 ft. A year ago it stood at 3.63 ft (+0.04 ft).

The level is falling, down 0.04 ft over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 3.62 ft and 7.04 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 34 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 5.10 ft1.43 ft below the median for this date
Normal for this date: 3.61 ft – 6.21 ft8 years in 10 fall in this range (34 years of records)
Same day last year: 3.63 ft+0.04 ft
Lowest and highest in 30 days: 3.62 ft – 7.04 ft
Lowest and highest in 12 months: 3.52 ft – 8.03 ft
Highest on record: 34.21 ftMay 25, 2013

What the stage means on the water

Low water means more dragging on shallow riffles and slower floats. Fish crowd into the deeper runs, and warm, low water stresses them, so play and release them quickly.

The National Weather Service puts flood stage for this gauge at 12.00 ft, still 8.33 ft away.

What happens at each level

30.00 ft: Drainage from above loop 410 and Brooks City Base cuts streets and areas below Loop 410 in the San Antonio River flood plain off. Several homes have a few feet of water in them.
27.00 ft: Three residences below Loop 410 on the left bank flood. Roads into the area are flooded and dangerous.
26.00 ft: Major flooding reaches slabs of residences on the left bank below Southeast Loop 410. Roads and streets near the San Antonio River are severely flooded and very dangerous.
23.00 ft: Moderate lowland flooding of lowest roads and bridges in the flood plain make auto traffic very dangerous. Lowest homes below Loop 410 in the left flood plain are threatened.
20.00 ft: Moderate lowland flooding of roads and streets below Brooks City Base and in the flood plain near Loop 410 makes auto travel in the flood plain very dangerous.
12.00 ft: Minor lowland flooding extends into low areas of the flood plain with no significant impact.
3.67 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	34.21 ft	May 25, 2013
2	32.57 ft	October 17, 1998
3	32.20 ft	July 15, 1990
4	29.36 ft	May 27, 1992
5	27.60 ft	May 24, 2015
6	27.43 ft	June 2, 2016
7	26.79 ft	May 19, 1987
8	25.10 ft	June 12, 2025
9	22.65 ft	May 5, 1993
10	22.45 ft	June 29, 1995

Weather at the gauge

Rain in the last 3 days: 0.03 in. Rain that falls upstream can take hours or days to show up at a river gauge.

17 Sat 70° 52° – Wind 15 mph

18 Sun 74° 48° – Wind 7 mph

19 Mon 72° 52° – Wind 9 mph

20 Tue 83° 62° – Wind 10 mph

21 Wed 81° 63° – Wind 9 mph

22 Thu 85° 64° – Wind 9 mph

23 Fri 85° 60° – Wind 12 mph

Forecast: Open-Meteo

Sunrise 07:38 AM Sunset 07:01 PM Daylight 11 hr, 22 min First quarter 56%

Map

Other gauges on the San Antonio River

Gauge	Level	Compared with normal	24 hours	Distance
San Antonio River at San AntonioRiver gauge, San Antonio River	3.93 ft	Normal	±0	7 mi
San Antonio River at Mitchell St, San AntonioRiver gauge, San Antonio River	4.26 ft	Normal	±0	5.6 mi
San Antonio River near Braunig Lake near ElmendorfRiver gauge, San Antonio River	11.34 ft	No reference yet	+0.01 ft	7 mi
San Antonio River near ElmendorfRiver gauge, San Antonio River	9.71 ft	Normal	+0.13 ft	9 mi
San Antonio River near FloresvilleRiver gauge, San Antonio River	3.85 ft	Very low	+0.05 ft	22 mi
San Antonio River near Falls CityRiver gauge, San Antonio River	0.86 ft	Low	±0	35 mi
San Antonio River at SH 72 near RungeRiver gauge, San Antonio River	10.11 ft	Normal	−0.26 ft	54 mi
San Antonio River at GoliadRiver gauge, San Antonio River	3.75 ft	Normal	−0.09 ft	79 mi
San Antonio River near McFaddinRiver gauge, San Antonio River	15.19 ft	No reference yet	+0.13 ft	101 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Salado Creek at Loop 13, San AntonioRiver gauge, Salado Creek	5.18 ft	Low	−0.02 ft	3.3 mi
Medina River at San AntonioRiver gauge, Medina River	3.01 ft	Low	−0.03 ft	4.7 mi
San Pedro Creek at Furnish St, San AntonioRiver gauge, San Pedro Creek	0.0 cfs	Very low	±0	7 mi
Leon Creek at IH 35, San AntonioRiver gauge, Leon Creek	2.23 ft	Normal	+0.03 ft	8 mi
Medina River near SomersetRiver gauge, Medina River	4.04 ft	Low	+0.01 ft	9 mi
Olmos Creek at Dresden Dr, San AntonioRiver gauge, Olmos Creek	1.81 ft	Normal	±0	13 mi
Leon Creek at Lp 410 at San AntonioRiver gauge, Leon Creek	4.04 ft	Low	−0.02 ft	14 mi

Questions and answers

How does the San Antonio River at Loop 410, San Antonio compare with last year?

It is 0.04 ft higher than on the same day last year, when the reading was 3.63 ft.

What is flood stage for the San Antonio River at Loop 410, San Antonio?

The official flood stage is 12.00 ft. The level is currently 8.33 ft below it.

What is a normal level for the San Antonio River at Loop 410, San Antonio in mid-October?

The median for mid-October is 5.10 ft. In 8 years out of 10 the reading falls between 3.61 ft and 6.21 ft, based on 34 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 San Antonio River at Loop 410, San Antonio today?

On Oct 19, 2026, 12:15 AM CDT, the water level was 3.67 ft. Down 0.04 ft over the last 24 hours.

Is San Antonio River at Loop 410, San Antonio rising or falling?

Down 0.04 ft over the last 24 hours. Steady over the last 7 days.

Is the level of San Antonio River at Loop 410, San Antonio normal?

Low for mid-October. Compared with 34 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:08178565 (Agency page)
Coordinates: 29.32218, -98.45032 (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	3.67 ft	2026-10-19 05:15	Provisional
Flow	16.3 cfs	2026-10-19 05:15	Provisional

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How to cite

U.S. Geological Survey: San Antonio River at Loop 410, San Antonio (usgs:08178565). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/san-antonio-river-at-loop-410-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