Arroyo Seco near Pasadena water level

Name: Arroyo Seco near Pasadena 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, Arroyo Seco, California, United States

Directions

Low for mid-October

Water level

0.95ft Steady over the last 24 hours

Measured Oct 19, 2026, 11:15 PM PDT (1 hour ago)

Flow: 0.1 cfs

History

7 days

Water level

What this means

The Arroyo Seco near Pasadena is running below normal at 0.95 ft.

The level has held steady over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. In the last month it has stayed between 0.84 ft and 0.98 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

Key numbers

Highest on record: 9.42 ftMarch 2, 1938

Floating and fishing near Arroyo Seco near Pasadena

Low water exposes gravel bars that make good wading access, but some boat ramps may be left high and dry.

Highest crests on record

Rank	Level	Date
1	9.42 ft	March 2, 1938

Weather at the gauge

No rain in the last 3 days.

18 Sun 84° 65° – Wind 8 mph

19 Mon 83° 62° – Wind 9 mph

20 Tue 76° 64° – Wind 9 mph

21 Wed 73° 61° 0.50 in, 63% Wind 16 mph

22 Thu 69° 59° 0.30 in, 67% Wind 10 mph

23 Fri 71° 60° – Wind 9 mph

24 Sat 82° 65° – Wind 8 mph

Forecast: Open-Meteo

Sunrise 07:03 AM Sunset 06:14 PM Daylight 11 hr, 11 min First quarter 66%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Big Tujunga Creek below Hansen DamRiver gauge, Big Tujunga Creek	0.0 cfs	Normal	±0	12 mi
Rio Hondo above Whittier Narrows DamRiver gauge, Rio Hondo	1.1 cfs	Normal	±0	13 mi
Rio Hondo below Whittier Narrows DamRiver gauge, Rio Hondo	0.0 cfs	Low	±0	15 mi
San Gabriel River above Whittier Narrows DamRiver gauge, San Gabriel River	0.2 cfs	Low	−0.8 cfs	15 mi
Los Angeles R A Sepulveda DamRiver gauge	27.3 cfs	Normal	−9.3 cfs	17 mi
Big Rock Creek near ValyermoRiver gauge, Big Rock Creek	6.0 cfs	Normal	−5.0 cfs	24 mi
Brea Creek below Brea Dam near FullertonRiver gauge, Brea Creek	0.1 cfs	Low	±0	27 mi
Fullerton Creek below Fullerton Dam near BreaRiver gauge, Fullerton Creek	0.6 cfs	High	+0.1 cfs	28 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 Arroyo Seco near Pasadena today?

On Oct 19, 2026, 11:15 PM PDT, the water level was 0.95 ft. Steady over the last 24 hours.

Is Arroyo Seco near Pasadena rising or falling?

Steady over the last 24 hours.

Is the level of Arroyo Seco near Pasadena normal?

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

What is the highest water level ever recorded at Arroyo Seco near Pasadena?

The highest level on record is 9.42 ft on March 2, 1938.

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:11098000 (Agency page)
Coordinates: 34.22223, -118.17756 (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	0.95 ft	2026-10-20 06:15	Provisional
Flow	0.1 cfs	2026-10-20 06:15	Provisional

Download

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How to cite

U.S. Geological Survey: Arroyo Seco near Pasadena (usgs:11098000). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/arroyo-seco-near-pasadena

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