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Guadalupe River at Seguin

Highest listed crest 36.80 ftFlood stage 19.0 ft18 crests since 1913

The Guadalupe River at Seguin crested at major flood stage 9 times among the 18 crests the National Weather Service lists from 1913 to 2025. The highest, 36.80 ft on October 18, 1998, was major flooding, 17.80 feet above flood stage. 5 other gauges on the Guadalupe River crested above flood stage within a week of it, 3 at their own highest listed crest.

The gauge

Highest listed crest
36.80 ft
October 18, 1998
Flood stage
19.0 ft
Major flooding from 26.0 ft
Crests at major
9
71st of 370 gauges in Texas
Most recent flood crest
October 14, 2021
19.24 ft, minor flooding
Location
Guadalupe County
Near Seguin (2.6 mi), New Braunfels (13.4 mi), Cibolo (14.9 mi)

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Guadalupe River at Seguin
Action stage17.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)19.01Oct 14, 2021Minimal or no property damage, but possibly some public threat
Moderate flood stage22.00—Some inundation of structures and roads near the stream
Major flood stage26.09Nov 22, 2004Extensive inundation of structures and roads

Every listed crest

18 crests from 1913 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Guadalupe River at Seguin, 1913 to 2025 010203040ft Flood stage 19.0 ftMajor 26.0 ft Jan 1, 1913: 32.50 ft, major floodingJan 1, 1935: 33.00 ft, major floodingJun 16, 1935: 35.50 ft, major floodingSep 11, 1952: 33.90 ft, major floodingMay 11, 1972: 32.80 ft, major floodingSep 27, 1973: 27.00 ft, major floodingOct 18, 1998: 36.80 ft, major floodingJul 7, 2002: 31.00 ft, major floodingNov 22, 2004: 31.00 ft, major floodingMar 10, 2017: 7.29 ft, below flood stageMar 28, 2018: 7.91 ft, below flood stageMay 14, 2019: 7.98 ft, below flood stageMay 12, 2020: 4.52 ft, below flood stageOct 14, 2021: 19.24 ft, minor flooding; 37,512 cubic feet per secondMar 22, 2022: 0.63 ft, below flood stageMar 29, 2023: 0.95 ft, below flood stageJan 22, 2024: 2.67 ft, below flood stageJul 5, 2025: 9.22 ft, below flood stage Highest, 36.80 ft, Oct 18, 1998 192019401960198020002020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Guadalupe River at Seguin 1910s: 1 1920s: 0 1930s: 2 2 1940s: 0 1950s: 1 1960s: 0 1970s: 2 1980s: 0 1990s: 1 2000s: 2 2010s: 0 2020s: 1 1910s1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Guadalupe River at Seguin
1Oct 18, 199836.80+17.80Major—
2Jun 16, 193535.50+16.50Major—
3Sep 11, 195233.90+14.90Major—
4Jan 1, 193533.00+14.00Major—
5May 11, 197232.80+13.80Major—
6Jan 1, 191332.50+13.50Major—
7Jul 7, 200231.00+12.00Major—
8Nov 22, 200431.00+12.00Major—
9Sep 27, 197327.00+8.00Major—
10Oct 14, 202119.24+0.24Minor37,512
11Jul 5, 20259.22−9.78Below flood stage—
12May 14, 20197.98−11.02Below flood stage—
13Mar 28, 20187.91−11.09Below flood stage—
14Mar 10, 20177.29−11.71Below flood stage—
15May 12, 20204.52−14.48Below flood stage—
16Jan 22, 20242.67−16.33Below flood stage—
17Mar 29, 20230.95−18.05Below flood stage—
18Mar 22, 20220.63−18.37Below flood stage—

The worst floods along the Guadalupe River

For this gauge's highest crests, the other gauges on the Guadalupe River that crested above flood stage within a week.

October 18, 1998: 36.80 ft here, major flooding

  • GonzalesTX · Oct 19, 1998 · 50.44 ft · Major · its highest
  • ComalTX · Oct 17, 1998 · 38.54 ft · Major
  • Comal River at New BraunfelsTX · Oct 17, 1998 · 35.57 ft · Major
  • VictoriaTX · Oct 20, 1998 · 34.04 ft · Major · its highest
  • BloomingtonTX · Oct 21, 1998 · 34.00 ft · Major · its highest

June 16, 1935: 35.50 ft here, major flooding

September 11, 1952: 33.90 ft here, major flooding

Gauges on the Guadalupe River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Guadalupe River
HuntTX10.037.52 ft, Jul 4, 20255
KerrvilleTX9.039.00 ft, Jul 2, 19324
ComfortTX21.042.30 ft, Jul 1, 18699
Spring BranchTX30.053.00 ft, Aug 3, 18696
Canyon LakeTX943.0950.02 ft, Jul 6, 20021
SattlerTX9.039.00 ft, Jul 1, 19325
Comal River at New BraunfelsTX7.038.00 ft, Aug 8, 186912
ComalTX13.039.50 ft, Aug 8, 186916
Seguin this gaugeTX19.036.80 ft, Oct 18, 19989
GonzalesTX31.050.44 ft, Oct 19, 19983
CueroTX24.044.36 ft, Aug 29, 201712
VictoriaTX21.034.04 ft, Oct 20, 199824
BloomingtonTX20.034.00 ft, Oct 21, 199813

Other gauges in Guadalupe County

Flood gauges in Guadalupe County
Selma17.035.40 ft, Oct 17, 19985

Guadalupe County: every hazard · River floods across the country · Texas

NOAA National Water Prediction Service, gauge SEGT2, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.