Guadalupe River at Seguin, TX
River level and flood forecast · Guadalupe County
Normal-2.7 ftas of Mon 3:15 PM
The river is 21.7 ft below flood stage (19 ft).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 26 ft |
| Moderate flood stage | 22 ft |
| Flood stage | 19 ft |
| Action stage | 17 ft |
| Record crest (October 18, 1998) | 36.8 ft |
What floods at each level
From the National Weather Service, highest first.
- 32 ftSeveral 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 ftWidespread disastrous flooding destroys lowest homes in the flood plain and damages many more. Numerous roads and bridges are severely flooded and dangerous.
- 26 ftMajor 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 ftModerate 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 ftMinor 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 ftWater starts to threaten RV lots closest to the river at the River Shafe RV Park near the HWY 123 bridge.
Highest crests on record
- 36.8 ft — October 18, 1998
- 35.5 ft — June 16, 1935
- 33.9 ft — September 11, 1952
- 33 ft — January 1, 1935
- 32.8 ft — May 11, 1972
Recent crests: 9.22 ft (July 5, 2025) · 2.67 ft (January 22, 2024) · 0.95 ft (March 29, 2023) · 0.63 ft (March 22, 2022) · 19.24 ft (October 14, 2021)
Up and down the river, and nearby
- UpstreamGuadalupe River below Comal, TX
- DownstreamGuadalupe River at FM 1117 near Seguin, TX
- Geronimo Creek near Seguin 2NE, TX
- Cibolo Creek near St. Hedwig, TX
- Guadalupe River above Comal River at New Braunfels, TX
- Comal River at New Braunfels, TX
- Martinez Creek near Saint Hedwig, TX
- Dry Comal at Loop 337, TX
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (SEGT2); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.