San Lorenzo Creek above Don Castro Reservoir near Castro V water level

Name: San Lorenzo Creek above Don Castro Reservoir near Castro V 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 Lorenzo Creek, California, United States

Directions

Normal for late October

Water level

7.47ft Steady over the last 24 hours

Measured Oct 21, 2026, 02:20 AM PDT (38 min ago)

Flow: 0.3 cfs

History

7 days

Water level

What this means

San Lorenzo Creek above Don Castro Reservoir near Castro V is at 7.47 ft, in the normal range for late October.

It has barely moved over the past 24 hours. In the last month it has stayed between 7.43 ft and 7.47 ft.

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

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

Floating and fishing near San Lorenzo Creek above Don Castro Reservoir near Castro V

Normal flows mean predictable rapids and good access at most put-ins.

Weather at the gauge

No rain in the last 3 days.

20 Tue 73° 51° – Wind 8 mph

21 Wed 71° 53° 0.06 in, 38% Wind 13 mph

22 Thu 58° 55° 0.09 in, 33% Wind 5 mph

23 Fri 72° 51° – Wind 5 mph

24 Sat 76° 51° – Wind 5 mph

25 Sun 81° 55° – Wind 4 mph

26 Mon 84° 56° – Wind 4 mph

Forecast: Open-Meteo

Sunrise 07:23 AM Sunset 06:24 PM Daylight 11 hr, 1 min Waxing gibbous 76%

Map

Other gauges on San Lorenzo Creek

Gauge	Level	Compared with normal	24 hours	Distance
San Lorenzo Creek below Bitterwater Creek near King CityRiver gauge, San Lorenzo Creek	0.0 cfs	Low	±0	112 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Crow Creek near HaywardRiver gauge, Crow Creek	2.90 ft	Below flood stage	±0	0.7 mi
San Lorenzo C A HaywardRiver gauge	2.58 ft	Below flood stage	−0.01 ft	1.3 mi
Castro Valley C A HaywardRiver gauge	0.2 cfs	Low	±0	2.2 mi
San Lorenzo C A San LorenzoRiver gauge	1.3 cfs	Normal	±0	5.3 mi
San Ramon C A San RamonRiver gauge	0.0 cfs	Low	±0	6.0 mi
Alamo Canal near PleasantonCanal gauge, Alamo Canal	1.83 ft	Below flood stage	−0.05 ft	7 mi
Alameda C Flood Channel A Union CityRiver gauge	11.2 cfs	Very high	+11.0 cfs	8 mi
Alameda Creek near NilesRiver gauge, Alameda Creek	2.61 ft	Below flood stage	+0.01 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 San Lorenzo Creek above Don Castro Reservoir near Castro V today?

On Oct 21, 2026, 02:20 AM PDT, the water level was 7.47 ft. Steady over the last 24 hours.

Is San Lorenzo Creek above Don Castro Reservoir near Castro V rising or falling?

Steady over the last 24 hours.

Is the level of San Lorenzo Creek above Don Castro Reservoir near Castro V normal?

Normal for late 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:11180825 (Agency page)
Coordinates: 37.69517, -122.04492 (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	7.47 ft	2026-10-21 09:20	Provisional
Flow	0.3 cfs	2026-10-21 09:20	Provisional

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How to cite

U.S. Geological Survey: San Lorenzo Creek above Don Castro Reservoir near Castro V (usgs:11180825). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/san-lorenzo-creek-above-don-castro-reservoir-near-castro-v

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