San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo water level

Name: San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo 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 Mateo Creek, California, United States

Directions

Normal for late October

Water level

4.14ft Steady over the last 24 hours

Measured Oct 21, 2026, 12:30 AM PDT (11 min ago)

Flow: 3.8 cfs
Water temperature: 58 °F

History

7 days

Water level

What this means

The gauge at San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo reads 4.14 ft, a normal level for late October.

The level has held steady over the past 24 hours. Over the past 30 days it has moved between 4.14 ft and 4.17 ft.

Fall is often low-water season on rivers, until steadier rain returns. The sensor also reports a water temperature of 58 °F.

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

What the stage means on the water

A normal level is usually prime time for floating and wade fishing, as long as the weather holds upstream.

Weather at the gauge

The forecast is not available right now.

Sunrise 07:24 AM Sunset 06:25 PM Daylight 11 hr, 1 min Waxing gibbous 75%

Map

Other gauges on San Mateo Creek

Gauge	Level	Compared with normal	24 hours	Distance
San Mateo Creek above Junction Box A Dam1 near HillsboroughRiver gauge, San Mateo Creek	0.08 ft	No reference yet	−0.01 ft	3.8 mi
San Mateo Creek below Junction Box A Dam1 near HillsboroughRiver gauge, San Mateo Creek	0.30 ft	No reference yet	±0	3.7 mi

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Pilarcitos Creek below Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	1.5 cfs	Normal	±0	2.3 mi
Pilarcitos Creek above Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	3.4 cfs	Normal	−0.1 cfs	2.3 mi
Pilarcitos Creek below Spillway near HillsboroughRiver gauge, Pilarcitos Creek	2.8 cfs	Normal	±0	3.7 mi
Pilarcitos Lake near HillsboroughLake, Pilarcitos Lake	679.65 ft	Below flood stage	−0.05 ft	3.7 mi
Pilarcitos C A Half Moon BayRiver gauge	2.74 ft	Below flood stage	+0.02 ft	6.0 mi
San Francisquito C A Stanford UniversityRiver gauge	0.18 ft	Below flood stage	±0	12 mi
San Francisco Bay A Old Dumbarton Branch near NewarkEstuary gauge, San Francisco Bay A Old Dumbarton Branch	4.04 ft	Very high	+1.41 ft	13 mi
San Gregorio C A San GregorioRiver gauge	3.69 ft	Below flood stage	+0.02 ft	14 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 Mateo Creek below Lo Crystal Sp Reservoir near San Mateo today?

On Oct 21, 2026, 12:30 AM PDT, the water level was 4.14 ft. Steady over the last 24 hours.

Is San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo rising or falling?

Steady over the last 24 hours.

Is the level of San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo 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:11162753 (Agency page)
Coordinates: 37.52944, -122.35833 (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	4.14 ft	2026-10-21 07:30	Provisional
Flow	3.8 cfs	2026-10-21 07:30	Provisional
Water temperature	58 °F	2026-10-21 07:30	Provisional

Download

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How to cite

U.S. Geological Survey: San Mateo Creek below Lo Crystal Sp Reservoir near San Mateo (usgs:11162753). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/san-mateo-creek-below-lo-crystal-sp-reservoir-near-san-mateo

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