Guadalupe River level at Sattler
Texas · Tubing & floating
Measured at USGS 08167800 — Guadalupe Rv at Sattler, TX · NWS forecast point STLT2
Reading taken · as of 13 min ago
Right around its normal summer float level
At 154 CFS, this gauge is running 94% of normal for mid-September — close to the 163 CFS median USGS has recorded for this date across 62 years of record (1964–2026).
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Flood stages at Sattler
National Weather Service categories for gauge STLT2, WFO EWX. Impact wording is the NWS's own, verbatim.
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Major flood 12.0 ft
- 12.0 ft Major flooding makes sections of River Road impassable. The bridge at Gruene is flooded. Sleeping campers, automobiles, and gear on low sections of the Guadalupe River near and above Gruene can be swept downstream.
- 13.0 ft The lowest homes in New Braunfels near Common Street flood. Flow is well over banks flooding much of River Road. Sleeping campers, autos, and gear on the banks near and above Gruene can be swept downstream. The bridge at Gruene is flooded. Flow is within a foot of the city park at Sattler.
- 17.0 ft Major flooding can be deadly in camping facilities along River Road between Canyon Dam and New Braunfels. Campers should evacuate low areas on foot directly away from the river. Do not drive automobiles along River Road. Lowest residences downstream in New Braunfels are threatened and low roads are very dangerous.
- 21.0 ft Disastrous flooding is potentially deadly to camps and motorists along River Road below Canyon Dam. Camps are under up to fifteen feet of turbulent flow. Lowest residences in New Braunfels are threatened and roads are severely flooded and very dangerous.
- 25.0 ft Disastrous life threatening flooding below Canyon Dam can be deadly to campers and motorists along River Road. Flow is near 20 feet deep in lowest camping areas and some sections of River Road. Lowest homes in New Braunfels are flooded. Low roads and bridges are very dangerous to motorists below Canyon Dam to below New Braunfels.
- 29.0 ft Life threatening disastrous flooding reaches slab elevation of the lowest homes in the reach near Sattler. Camp facilities in the Guadalupe River flood plain below Canyon Dam to New Braunfels are disastrously flooded. River Road is impassable and deadly. Evacuations should be on foot directly away from the river and in no circumstances by automobiles. Residential flooding in New Braunfels is disastrous.
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Moderate flood 10.0 ft
- 11.0 ft The low bridge near Gruene is closed. Lowest sections of River Road will experience flooding. Water will approach River Road bridge Crossings 1, 2, 3, and 4 downstream.
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Minor flood 9.0 ft
- 9.0 ft The low bridge near Gruene is closed. Minor lowland flooding approaches the lowest sections of River Road downstream below Sattler.
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Action 8.0 ft
- Right now 4.70 ft
NWS forecast: 4.70 ft by .
Flow history at Sattler
Daily values from USGS 08167800, updated every 15 to 60 minutes; NWS forecast for STLT2 reissued through the day. Provisional.
Highest crests on record at Sattler
5 on record
| Stage | Flow | Date |
|---|---|---|
| 39.00 ft | — | Jul 1, 1932 |
| 39.00 ft | — | Jun 1, 1935 |
| 35.55 ft | — | Jul 6, 2002 |
| 33.30 ft | — | Sep 1, 1952 |
| 12.20 ft | 20,800 CFS | Oct 29, 1960 |
Crests published by the National Weather Service.
About Guadalupe River at Sattler
In Texas, below Canyon Lake. Releases can change the flow by hundreds of CFS in an hour with no rain in the basin — check it the morning you go, not the night before. Below Canyon Dam; biggest tubing/rafting economy in Texas.
Reservoir feeding this stretch
Flow here is set by releases from Canyon Lake. A full pool usually means more water on its way down.
Guadalupe River at Sattler — common questions
3 questions
Does rain upstream change Guadalupe River at Sattler quickly?
Less than you would expect. Below Canyon Lake, the dam schedule matters more than rainfall — a storm fills the reservoir first, and the operator decides when it reaches you. The river can come up on a clear day.
Is Guadalupe River at Sattler high or low for this time of year?
The USGS median flow for mid-September here is 163 CFS, from 62 years of record (1964–2026). Today is 94% of it. The comparison is what makes the raw number mean anything: the same reading is a drought on one river and a flood on another.
How often does this reading update?
USGS transmits from gauge 08167800 every 15 to 60 minutes, and the National Weather Service reissues the flood forecast for STLT2 a few times a day — more often when the river is rising. This page refreshes from both when you open it. The timestamp is in the gauge's local time.