Warning: Javascript must be enabled to use all the features on this page!


Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

USGS Daily Statistics for Texas

Click to hide state-specific text

Explore Real-time Water Data Using New Products from USGS TXWSC

View over 750 USGS real-time stream, lake, reservoir, precipitation, and groundwater stations in context with current weather and hazard conditions on both desktop and mobile devices.

Click to go to the Texas Water Dashboard Click to go to the WATER On-the-go app

Follow @USGS_TexasFlood and @USGS_TexasRain on Twitter to get current water level and precipitation data during flooding or severe rainfall events.


The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 08171400 San Marcos Rv nr Martindale, TX


Caldwell County, Texas
Hydrologic Unit Code 12100203
Latitude  29°49'56.23", Longitude  97°50'32.58" NAD83
Drainage area 547  square miles
Gage datum 486 feet above NAVD88
Output formats
HTML table of all data
Tab-separated data
Reselect output format

00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 2010-10-01 -> 2020-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 265 265 243 252 265 631 310 237 237 220 1,640 268
2 308 260 240 267 260 628 298 234 234 218 532 265
3 400 257 238 275 256 653 294 233 232 218 435 290
4 346 259 241 246 658 531 295 235 236 212 385 276
5 319 265 245 243 370 484 289 233 241 205 364 284
6 304 254 239 238 299 454 281 229 234 201 330 274
7 297 251 237 264 278 424 277 240 234 198 315 311
8 292 245 236 241 334 402 273 228 231 196 319 331
9 293 245 258 235 881 383 281 223 276 199 315 286
10 278 247 264 232 429 370 272 222 299 193 308 276
11 277 245 260 226 462 365 270 221 247 193 298 271
12 277 244 265 225 415 350 262 221 236 192 290 269
13 272 242 258 265 458 338 258 218 232 212 282 278
14 268 249 256 231 392 349 260 221 235 368 275 290
15 266 248 249 228 378 351 263 224 238 234 277 281
16 267 242 247 230 392 345 263 250 239 225 274 277
17 281 240 247 231 631 375 258 268 238 232 274 272
18 299 247 243 323 775 352 258 247 249 223 271 262
19 302 245 247 280 574 330 254 237 239 219 268 281
20 287 293 300 300 673 329 253 234 237 222 262 262
21 279 306 289 285 454 320 250 248 204 222 260 257
22 296 271 274 292 415 337 247 246 215 217 265 256
23 279 273 262 283 397 327 248 243 230 221 263 251
24 280 261 260 280 1,620 319 249 236 214 253 259 249
25 505 251 257 275 1,400 312 250 232 212 267 261 246
26 317 246 252 265 1,390 318 249 264 394 237 257 243
27 283 245 250 269 812 317 259 333 342 233 257 297
28 276 243 373 261 721 312 246 307 291 227 259 325
29 275 216 337 264 737 382 242 252 310 222 268 283
30 269   272 264 678 323 239 247 250 1,360 276 270
31 267   260   665   238 242   2,980   268