Santa Ana River near Mentone (River Only) water level

Name: Santa Ana River near Mentone (River Only) 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, Santa Ana River, California, United States

Directions

Low for mid-October

Water level

5.93ft Down 0.05 ft over the last 24 hours

Measured Oct 20, 2026, 03:45 PM PDT (18 min ago)

Flow: 0.0 cfs

History

7 days

Water level

What this means

At 5.93 ft, the Santa Ana River near Mentone (River Only) is below normal for mid-October.

The level is falling, down 0.05 ft over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 5.93 ft and 6.02 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 5 years of daily readings for this time of year. How to read levels

What the stage means on the water

Low water means more dragging on shallow riffles and slower floats. Fish crowd into the deeper runs, and warm, low water stresses them, so play and release them quickly.

Weather at the gauge

No rain in the last 3 days.

20 Tue 82° 60° – Wind 12 mph

21 Wed 74° 57° 0.58 in, 24% Wind 15 mph

22 Thu 64° 56° 0.44 in, 92% Wind 8 mph

23 Fri 67° 52° – Wind 6 mph

24 Sat 76° 54° – Wind 7 mph

25 Sun 79° 59° – Wind 9 mph

26 Mon 82° 60° – Wind 6 mph

Forecast: Open-Meteo

Sunrise 06:58 AM Sunset 06:09 PM Daylight 11 hr, 11 min Waxing gibbous 72%

Map

Other gauges on the Santa Ana River

Gauge	Level	Compared with normal	24 hours	Distance
Santa Ana River below Prado DamRiver gauge, Santa Ana River	138 cfs	Normal	−8.0 cfs	35 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Sar Supp Gage near MentoneRiver gauge, Sar Supp Gage	2.0 cfs	Normal	+0.1 cfs	0.0 mi
Plunge Creek near East HighlandsRiver gauge, Plunge Creek	6.9 cfs	Very high	−0.2 cfs	2.5 mi
City Creek near HighlandRiver gauge, City Creek	1.7 cfs	Normal	+0.9 cfs	5.6 mi
San Timoteo Creek near Loma LindaRiver gauge, San Timoteo Creek	0.1 cfs	Low	−4.8 cfs	10 mi
East Twin Creek near Arrowhead SpringsRiver gauge, East Twin Creek	0.5 cfs	Low	±0	11 mi
Waterman Canyon Creek near Arrowhead SpringsRiver gauge, Waterman Canyon Creek	0.5 cfs	Normal	+0.1 cfs	11 mi
Warm Creek near San BernardinoRiver gauge, Warm Creek	0.0 cfs	Low	±0	12 mi
Santa Ana R A East St near San BernardinoRiver gauge, Santa Ana R A East St	4.7 cfs	Normal	−8.8 cfs	12 mi

Questions and answers

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 Santa Ana River near Mentone (River Only) today?

On Oct 20, 2026, 03:45 PM PDT, the water level was 5.93 ft. Down 0.05 ft over the last 24 hours.

Is Santa Ana River near Mentone (River Only) rising or falling?

Down 0.05 ft over the last 24 hours.

Is the level of Santa Ana River near Mentone (River Only) normal?

Low for mid-October. Compared with 5 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

Where does this data come from?

The values come directly from the U.S. Geological Survey, the official operator of this gauge, and are in the public domain. We do not estimate or model live values.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:11051499 (Agency page)
Coordinates: 34.10834, -117.10059 (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	5.93 ft	2026-10-20 22:45	Provisional
Flow	0.0 cfs	2026-10-20 22:45	Provisional

Download

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How to cite

U.S. Geological Survey: Santa Ana River near Mentone (River Only) (usgs:11051499). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/santa-ana-river-near-mentone-river-only

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