San Marcos River near Martindale water level

Name: San Marcos River near Martindale water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, San Marcos River, Texas, United States

Directions

Normal for mid-October

Water level

7.42ft Steady over the last 24 hours

Measured Oct 19, 2026, 02:45 AM CDT (22 min ago)

Flow: 99.5 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %)

What this means

The gauge at San Marcos River near Martindale reads 7.42 ft, a normal level for mid-October.

The median for mid-October is 7.45 ft, based on 15 years of readings, so the river stage is 0.03 ft below typical. On the same day last year the reading was 7.30 ft, a difference of +0.12 ft.

It has barely moved over the past 24 hours. Over the past 30 days it has moved between 7.40 ft and 7.66 ft.

Fall is often low-water season on rivers, until steadier rain returns.

Compared with 15 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 7.45 ft0.03 ft below the median for this date
Normal for this date: 6.89 ft – 8.41 ft8 years in 10 fall in this range (15 years of records)
Same day last year: 7.30 ft+0.12 ft
Lowest and highest in 30 days: 7.40 ft – 7.66 ft
Lowest and highest in 12 months: 7.28 ft – 8.30 ft
Highest on record: 40.68 ftOctober 31, 2013

What the stage means on the water

A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.

Highest crests on record

Rank	Level	Date
1	40.68 ft	October 31, 2013
2	36.18 ft	October 30, 2015
3	26.23 ft	May 24, 2015
4	24.71 ft	October 14, 2021
5	24.32 ft	May 9, 2019
6	20.40 ft	May 4, 2019
7	18.59 ft	May 18, 2015

Weather at the gauge

No rain in the last 3 days.

18 Sun 75° 46° – Wind 8 mph

19 Mon 77° 52° – Wind 10 mph

20 Tue 82° 56° – Wind 10 mph

21 Wed 83° 63° – Wind 8 mph

22 Thu 86° 64° – Wind 10 mph

23 Fri 86° 61° – Wind 11 mph

24 Sat 85° 61° – Wind 11 mph

Forecast: Open-Meteo

Sunrise 07:36 AM Sunset 06:58 PM Daylight 11 hr, 21 min First quarter 57%

Map

Other gauges on the San Marcos River

Gauge	Level	Compared with normal	24 hours	Distance
San Marcos River at San MarcosRiver gauge, San Marcos River	3.64 ft	Low	±0	7 mi
San Marcos River at LulingRiver gauge, San Marcos River	3.70 ft	Very low	+0.01 ft	16 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Blanco River at San MarcosRiver gauge, Blanco River	7.10 ft	Below flood stage	−0.24 ft	5.2 mi
Blanco River near KyleRiver gauge, Blanco River	2.96 ft	Very low	±0	11 mi
Plum Creek at LockhartRiver gauge, Plum Creek	2.01 ft	Normal	−0.01 ft	12 mi
Blanco River at Halifax Rch near KyleRiver gauge, Blanco River	0.82 ft	Low	−0.01 ft	14 mi
Plum Creek near LulingRiver gauge, Plum Creek	4.44 ft	Low	−0.08 ft	17 mi
Guadalupe River above Comal River at New BraunfelsRiver gauge, Guadalupe River	2.02 ft	Normal	+0.01 ft	18 mi
Guadalupe River at New BraunfelsRiver gauge, Guadalupe River	9.50 ft	Normal	±0	18 mi
Blanco River at WimberleyRiver gauge, Blanco River	3.52 ft	Low	+0.02 ft	19 mi

Questions and answers

Is the San Marcos River near Martindale higher than last year?

Yes, it is 0.12 ft higher than on the same day last year, when the reading was 7.30 ft.

What is a normal level for the San Marcos River near Martindale in mid-October?

The median for mid-October is 7.45 ft. In 8 years out of 10 the reading falls between 6.89 ft and 8.41 ft, based on 15 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of San Marcos River near Martindale today?

On Oct 19, 2026, 02:45 AM CDT, the water level was 7.42 ft. Steady over the last 24 hours.

Is San Marcos River near Martindale rising or falling?

Steady over the last 24 hours. Down 0.04 ft over the last 7 days.

Is the level of San Marcos River near Martindale normal?

Normal for mid-October. Compared with 15 years of daily readings for this time of year.

What is the highest water level ever recorded at San Marcos River near Martindale?

The highest level on record is 40.68 ft on October 31, 2013.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:08171400 (Agency page)
Coordinates: 29.83229, -97.84238 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	7.42 ft	2026-10-19 07:45	Provisional
Flow	99.5 cfs	2026-10-19 07:45	Provisional

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How to cite

U.S. Geological Survey: San Marcos River near Martindale (usgs:08171400). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/texas/san-marcos-river-near-martindale

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer