Castro Valley C A Hayward water level

Name: Castro Valley C A Hayward 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, California, United States

Directions

Low for mid-October

Water level

0.65ft Steady over the last 24 hours

Measured Oct 19, 2026, 06:20 PM PDT (1 hour ago)

Flow: 0.2 cfs

History

7 days

Water level

What this means

Low water at Castro Valley C A Hayward: the gauge reads 0.65 ft, below normal for mid-October.

It has barely moved over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. The 30-day range is 0.63 ft – 0.71 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: 9.05 ftFebruary 3, 1998

Paddling and fishing conditions

At low levels, plan for shorter paddling trips and expect to walk your boat through a few shoals.

Highest crests on record

Rank	Level	Date
1	9.05 ft	February 3, 1998
2	8.51 ft	January 23, 1983
3	8.30 ft	January 2, 1997
4	8.23 ft	January 20, 1993
5	7.76 ft	October 23, 1989
6	7.36 ft	January 4, 1982
7	7.30 ft	February 15, 1982
8	7.24 ft	March 13, 1983
9	7.20 ft	January 8, 1979
10	7.18 ft	March 10, 1995

Weather at the gauge

No rain in the last 3 days.

18 Sun 69° 54° – Wind 9 mph

19 Mon 63° 52° – Wind 11 mph

20 Tue 67° 51° – Wind 7 mph

21 Wed 66° 59° 0.40 in, 48% Wind 7 mph

22 Thu 65° 59° 0.04 in, 26% Wind 10 mph

23 Fri 71° 58° – Wind 9 mph

24 Sat 75° 58° – Wind 6 mph

Forecast: Open-Meteo

Sunrise 07:22 AM Sunset 06:25 PM Daylight 11 hr, 3 min First quarter 64%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
San Lorenzo C A HaywardRiver gauge	2.59 ft	Below flood stage	+0.01 ft	1.0 mi
San Lorenzo Creek above Don Castro Reservoir near Castro VRiver gauge, San Lorenzo Creek	0.3 cfs	Normal	±0	2.2 mi
Crow Creek near HaywardRiver gauge, Crow Creek	2.90 ft	Below flood stage	−0.04 ft	2.6 mi
Cull Creek above Cull C Reservoir near Castro ValleyRiver gauge, Cull Creek	0.0 cfs	Normal	±0	3.0 mi
San Lorenzo C A San LorenzoRiver gauge	1.3 cfs	Normal	±0	3.3 mi
Alameda C Flood Channel A Union CityRiver gauge	0.2 cfs	Normal	±0	7 mi
San Ramon C A San RamonRiver gauge	0.0 cfs	Low	±0	8 mi
Alamo Canal near PleasantonCanal gauge, Alamo Canal	1.86 ft	Below flood stage	+0.04 ft	9 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 Castro Valley C A Hayward today?

On Oct 19, 2026, 06:20 PM PDT, the water level was 0.65 ft. Steady over the last 24 hours.

Is Castro Valley C A Hayward rising or falling?

Steady over the last 24 hours.

Is the level of Castro Valley C A Hayward 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 Castro Valley C A Hayward?

The highest level on record is 9.05 ft on February 3, 1998.

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:11181008 (Agency page)
Coordinates: 37.67993, -122.08052 (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	0.65 ft	2026-10-20 01:20	Provisional
Flow	0.2 cfs	2026-10-20 01:20	Provisional

Download

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How to cite

U.S. Geological Survey: Castro Valley C A Hayward (usgs:11181008). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/castro-valley-c-a-hayward

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