About this river
Purgatory Creek is a 2.4 mile stream near Kayak Instruction in Texas. Streamflow is measured at the USGS gauge San Marcos Rv at San Marcos, TX (site 08170500). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1995 to 2026
Purgatory Creek typically runs highest in June, at a median 179 cfs, and lowest in September, at 147 cfs. The highest flow on record for any single day is 6,200 cfs, in 1999.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 161 | 112 to 222 | |
| February | 157 | 114 to 241 | |
| March | 158 | 114 to 235 | |
| April | 160 | 114 to 223 | |
| May | 172 | 122 to 224 | |
| June | 179 | 115 to 231 | |
| July | 172 | 109 to 222 | |
| August | 153 | 105 to 207 | |
| September | 147 | 103 to 214 | |
| October | 150 | 108 to 202 | |
| November | 175 | 105 to 227 | |
| December | 163 | 104 to 229 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 32 years of record. Statistics published by the US Geological Survey for San Marcos Rv at San Marcos, TX (site 08170500). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Purgatory Creek's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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