Guadalupe River near Spring Branch

1. 45.00 ftMajor flooding rises to the USGS gauge house at FM 311. Several homes are cut off above Spring Branch and two homes flood. Approaches to the Highway 281 bridge flood closing the highway. Picnic facilities at Guadalupe River State Park are flooded. Parks and facilities downstream at Canyon Lake are inundated.
2. 43.00 ftMajor flooding reaches several lowest homes below Comfort to Canyon Lake. Numerous roads and bridges are flooded and dangerous. Lowest facilities in Guadalupe State Park are severely damaged. Parks, docks and roads around Canyon Lake are flooded and damaged.
3. 39.00 ftMajor flooding reaches secondary roads and low bridges near the river making them extremely dangerous to motorists. The lowest residences flood from Kendall County to Canyon Lake. Picnic and camping facilities in Guadalupe River State Park upstream are severely flooded. Roads, marinas, and many parks and facilities at Canyon Lake flood.
4. 36.00 ftModerate lowland flooding reaches secondary roads and low bridges in the flood plain. Recreationists should evacuate the river banks because of dangerous turbulent flow. Low sections of Guadalupe River State Park have tables, trash cans, and equipment damaged. Lowest homes in Kendall County to Canyon Lake flood.
5. 30.00 ftMinor lowland flooding rises into the flood plain at Guadalupe River State Park damaging tables, trash cans and camping equipment. Swimming and any recreation in the river is extremely dangerous with turbulence, trees and trash in the water.
6. 28.00 ftMinor lowland flooding extends into lowest areas of Guadalupe River State Park. Swimming, tubing, and canoeing above Guadalupe River State Park to Canyon Lake is dangerous except with commercial outfitters.
7. 25.00 ftFlow extends over lowest sections of banks. Turbulent flow is very dangerous to tubers and swimmers above Guadalupe River State Park except with commercial outfitters.
8. 23.00 ftTurbulent flow makes swimming and tubing dangerous above Guadalupe River State Park to Canyon Lake. Lowest areas of Guadalupe River State Park are flooded.
9. 19.00 ftTurbulent flow makes swimming and tubing dangerous above Guadalupe River State Park to Canyon Lake.
10. 15.00 ftThe Guadalupe river is dangerous to swimmers, tubers and canoeists above Guadalupe River State Park to Canyon Lake, except with commercial outfitters.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.

Most recent crests

• July 17, 2026: 36.75 ft
• July 5, 2025: 30.03 ft
• May 30, 2016: 25.56 ft
• October 30, 2015: 29.98 ft
• May 24, 2015: 34.50 ft
• July 3, 2002: 43.75 ft
• October 17, 1998: 27.43 ft
• June 22, 1997: 45.12 ft
• December 21, 1991: 38.00 ft
• July 18, 1987: 35.58 ft

• UpstreamGuadalupe River at FM474 near Bergheim
• DownstreamGuadalupe River at Canyon Lake
• Cibolo Creek at Smithson Valley Rd nr Bulverde
• Bear Creek at FM 2722 nr Sattler
• Cibolo Creek
• Little Blanco River at FM32 near Fischer
• Guadalupe River at Sattler
• Guadalupe River at 3rd Crossing nr Sattler
• Blanco River at Fischer Store Rd near Fischer

Forecasts by the West Gulf River Forecast Center. Forecasts are issued routinely year-round. River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.