San Lorenzo C A Hayward water level

Name: San Lorenzo 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

Below flood stage

Water level

2.59ft Steady over the last 24 hours

Measured Oct 20, 2026, 09:05 AM PDT (35 min ago)

Flow: 0.6 cfs

History

7 days

Water level Forecast Minor flood stage

The forecast expects the river to rise to 3.28 ft by Wednesday, October 21 at 04:00 PM. Issued Monday, October 19 at 06:39 AM by NOAA National Weather Service.

What this means

San Lorenzo C A Hayward is at 2.59 ft, in the normal range.

It is 22.05 ft below the flood stage of 24.64 ft.

It has barely moved over the past 24 hours. The forecast expects the river to rise to 3.28 ft by Wednesday, October 21 at 04:00 PM. In the last month it has stayed between 2.57 ft and 2.59 ft.

Judged against the official flood stage for this gauge. How to read levels

Key numbers

Forecast peak: 3.28 ftWednesday, October 21 at 04:00 PM

Floating and fishing near San Lorenzo C A Hayward

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

Flood stage here is 24.64 ft, 22.05 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

33.00 ft: Major Flooding. Homes and local roadways inundated with several feet of water.
29.64 ft: Moderate Flooding. Homes and roadways adjacent to the creek in this location begin to flood.
24.64 ft: Minor Flooding. At 24.64 feet, flooding may have begun downstream at the San Lorenzo Creek near San Lorenzo stream gage. NWS will issue Flash Flood Warning if not already issued.
20.85 ft: Action Stage. At 20.85 feet the San Lorenzo Creek near San Lorenzo gage downstream is close to flooding. NWS will issue a Flash Flood Watch if not already issued.
2.59 ft: Right now

Impact statements from the U.S. National Weather Service.

Weather at the gauge

The forecast is not available right now.

Sunrise 07:22 AM Sunset 06:25 PM Daylight 11 hr, 3 min Waxing gibbous 70%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Castro Valley C A HaywardRiver gauge	0.2 cfs	Low	±0	1.0 mi
San Lorenzo Creek above Don Castro Reservoir near Castro VRiver gauge, San Lorenzo Creek	0.3 cfs	Normal	±0	1.3 mi
Crow Creek near HaywardRiver gauge, Crow Creek	2.90 ft	Below flood stage	−0.04 ft	1.8 mi
Cull Creek above Cull C Reservoir near Castro ValleyRiver gauge, Cull Creek	0.0 cfs	Normal	±0	2.3 mi
San Lorenzo C A San LorenzoRiver gauge	1.3 cfs	Normal	±0	4.1 mi
Alameda C Flood Channel A Union CityRiver gauge	3.0 cfs	Normal	+2.9 cfs	7 mi
San Ramon C A San RamonRiver gauge	0.0 cfs	Low	±0	7 mi
Alamo Canal near PleasantonCanal gauge, Alamo Canal	1.88 ft	Below flood stage	+0.04 ft	8 mi

Questions and answers

What is flood stage for San Lorenzo C A Hayward?

The official flood stage is 24.64 ft. The level is currently 22.05 ft below it.

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 C A Hayward today?

On Oct 20, 2026, 09:05 AM PDT, the water level was 2.59 ft. Steady over the last 24 hours.

Is San Lorenzo C A Hayward rising or falling?

Steady over the last 24 hours.

Is the level of San Lorenzo C A Hayward normal?

Below flood stage. Judged against the official flood stage for this gauge.

Is San Lorenzo C A Hayward expected to rise?

The forecast expects the river to rise to 3.28 ft by Wednesday, October 21 at 04:00 PM.

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.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:11181000 (Agency page)
Coordinates: 37.68549, -122.06441 (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	2.59 ft	2026-10-20 16:05	Provisional
Flow	0.6 cfs	2026-10-20 16:05	Provisional

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How to cite

U.S. Geological Survey: San Lorenzo C A Hayward (usgs:11181000). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/san-lorenzo-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