Guadalupe River at Hwy 123-BR at Seguin water level

Name: Guadalupe River at Hwy 123-BR at Seguin 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, Guadalupe River, Texas, United States

Directions

Very high for mid-October

Water level

16.21ft Up 17.86 ft over the last 24 hours

Measured Oct 20, 2026, 08:15 AM CDT (48 min ago)

History

7 days 30 days 1 year Years compared

20252026

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

What this means

The Guadalupe River at Hwy 123-BR at Seguin is well above normal at 16.21 ft.

The median for mid-October is −0.61 ft, based on 9 years of readings, so the river stage is 16.82 ft above typical. It is 2.79 ft below the flood stage of 19.00 ft. On the same day last year the reading was −2.24 ft, a difference of +18.45 ft.

It has risen 17.86 ft over the past 24 hours. If the rise continues, low-lying paths and riverside parking can go under water. In the last month it has stayed between −3.00 ft and 16.23 ft.

That stands out in fall, when many rivers are usually near their lowest.

Compared with 9 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: −0.61 ft16.82 ft above the median for this date
Normal for this date: −2.59 ft – 14.82 ft8 years in 10 fall in this range (9 years of records)
Same day last year: −2.24 ft+18.45 ft
Lowest and highest in 30 days: −3.00 ft – 16.23 ft
Lowest and highest in 12 months: −3.01 ft – 5.66 ft
Highest on record: 36.80 ftOctober 18, 1998

Flood levels and safety

Most flood deaths in the US happen in vehicles. Six inches of fast water can knock an adult off their feet, and a foot or two can float a car. If a road is covered, turn around.

Readings can change quickly after heavy rain upstream, so check again before heading near the water.

What happens at each level

32.00 ft: Several homes in low areas of the flood plain in Seguin are destroyed. Several structures are washed downstream. Nearly all of Treasure Island at Lake McQueeny is under water with homes severely flooded and damaged. Livestock in the flood plain above Seguin to below Cuero are cut off and potentially drowned.
29.00 ft: Widespread disastrous flooding destroys lowest homes in the flood plain and damages many more. Numerous roads and bridges are severely flooded and dangerous.
26.00 ft: Major flooding damages several homes in the Glen Cove Subdivision and downstream. Numerous roads, streets and bridges are extremely dangerous. Livestock should be moved from the flood plain immediately.
22.00 ft: Moderate lowland flooding threatens homes in the Glen Cove Subdivdision in Seguin. Roads and low bridges near the river are flooded and dangerous. Runoff down Walnut Branch northwest of downtown Seguin threatens lowest homes and apartments.
19.00 ft: Minor lowland flooding is in low areas of the flood plain approaching but not reaching lowest homes in Seguin. Runoff down Walnut Branch northwest of downtown Seguin is a threat to lowest homes and apartments. Flood waters have reached the lowest row of RV lots at the River Shade RV Park near the HWY 123 bridge.
17.00 ft: Water starts to threaten RV lots closest to the river at the River Shafe RV Park near the HWY 123 bridge.
16.21 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: 7 %.

Rank	Level	Date
1	36.80 ft	October 18, 1998
2	35.50 ft	June 16, 1935
3	33.90 ft	September 11, 1952
4	33.00 ft	January 1, 1935
5	32.80 ft	May 11, 1972
6	32.50 ft	January 1, 1913
7	31.00 ft	November 22, 2004
8	31.00 ft	July 7, 2002
9	27.00 ft	September 27, 1973
10	19.24 ft	October 14, 2021

Weather at the gauge

The forecast is not available right now.

Sunrise 07:37 AM Sunset 06:57 PM Daylight 11 hr, 20 min First quarter 69%

Map

Other gauges on the Guadalupe River

Gauge	Level	Compared with normal	24 hours	Distance
Guadalupe River at ComfortRiver gauge, Guadalupe River	3.27 ft	High	−0.03 ft	63 mi
Guadalupe River at FM 474 near BergheimRiver gauge, Guadalupe River	82.2 cfs	High	+3.2 cfs	48 mi
Guadalupe River near Spring BranchRiver gauge, Guadalupe River	2.32 ft	Normal	−0.02 ft	33 mi
Guadalupe River at SattlerRiver gauge, Guadalupe River	4.45 ft	Normal	+0.01 ft	25 mi
Guadalupe River at Third Crossing near SattlerRiver gauge, Guadalupe River	3.80 ft	Normal	±0	21 mi
Guadalupe River above Comal River at New BraunfelsRiver gauge, Guadalupe River	2.01 ft	Normal	±0	14 mi
Guadalupe River at New BraunfelsRiver gauge, Guadalupe River	9.48 ft	Normal	−0.01 ft	13 mi
Guadalupe River at FM 1117 near SeguinRiver gauge, Guadalupe River	11.32 ft	Low	+0.07 ft	5.4 mi
Guadalupe River at CR 143 near GonzalesRiver gauge, Guadalupe River	5.80 ft	Low	+0.09 ft	23 mi
Guadalupe River at GonzalesRiver gauge, Guadalupe River	11.19 ft	Low	+0.03 ft	32 mi
Guadalupe River at Hwy 183 near HochheimRiver gauge, Guadalupe River	14.55 ft	No reference yet	±0	43 mi
Guadalupe River at CueroRiver gauge, Guadalupe River	7.06 ft	Normal	+0.01 ft	50 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Cibolo Creek near Saint HedwigRiver gauge, Cibolo Creek	10.49 ft	Very high	+0.04 ft	13 mi
Comal River at New BraunfelsRiver gauge, Comal River	3.63 ft	Very low	±0	14 mi
Martinez Creek near Saint HedwigRiver gauge, Martinez Creek	2.62 ft	Low	+0.02 ft	14 mi
Dry Comal Creek at Loop 337 near New BraunfelsRiver gauge, Dry Comal Creek	4.82 ft	Low	±0	15 mi
Comal River (oc) near Landa Lake, New BraunfelsRiver gauge, Comal River (oc)	1.95 ft	Normal	−0.01 ft	15 mi
Comal River (nc) near Landa Lake, New BraunfelsRiver gauge, Comal River (nc)	0.39 ft	Normal	−0.14 ft	15 mi
Hueco Spgs near New BraunfelsRiver gauge, Hueco Spgs	7.13 ft	Normal	+0.01 ft	18 mi

Questions and answers

Is the Guadalupe River at Hwy 123-BR at Seguin higher than last year?

Yes, it is 18.45 ft higher than on the same day last year, when the reading was −2.24 ft.

What is flood stage for the Guadalupe River at Hwy 123-BR at Seguin?

The official flood stage is 19.00 ft. The level is currently 2.79 ft below it.

What is a normal level for the Guadalupe River at Hwy 123-BR at Seguin in mid-October?

The median for mid-October is −0.61 ft. In 8 years out of 10 the reading falls between −2.59 ft and 14.82 ft, based on 9 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 Guadalupe River at Hwy 123-BR at Seguin today?

On Oct 20, 2026, 08:15 AM CDT, the water level was 16.21 ft. Up 17.86 ft over the last 24 hours.

Is Guadalupe River at Hwy 123-BR at Seguin rising or falling?

Up 17.86 ft over the last 24 hours. Up 18.24 ft over the last 7 days.

Is the level of Guadalupe River at Hwy 123-BR at Seguin normal?

Very high for mid-October. Compared with 9 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:08169740 (Agency page)
Coordinates: 29.55141, -97.96938 (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	16.21 ft	2026-10-20 13:15	Provisional

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How to cite

U.S. Geological Survey: Guadalupe River at Hwy 123-BR at Seguin (usgs:08169740). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/guadalupe-river-at-hwy-123-br-at-seguin

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