San Gregorio C A San Gregorio water level

Name: San Gregorio C A San Gregorio 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

3.67ft Steady over the last 24 hours

Measured Oct 20, 2026, 03:15 AM PDT (46 min ago)

Flow: 1.4 cfs

History

7 days

Water level Minor flood stage

What this means

The gauge at San Gregorio C A San Gregorio reads 3.67 ft, a normal level.

It is 14.03 ft below the flood stage of 17.70 ft.

It has barely moved over the past 24 hours. Over the past 30 days it has moved between 3.64 ft and 3.68 ft.

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

Judged against the official flood stage for this gauge. 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.

The National Weather Service puts flood stage for this gauge at 17.70 ft, still 14.03 ft away.

What happens at each level

25.00 ft: Major flood stage. Stage Road at San Gregorio Creek flooded and adjacent floodplain properties under 4 or more feet of water.
21.00 ft: Moderate flood stage. Adjacent floodplain under several feet of water. Stage Road crossing is backwatered.
17.70 ft: Minor flood stage. Flood waters inundate floodplain upstream of Stage Road crossing, mainly on left bank side (as looking downstream). NWS will issue a Flash Flood Warning if not yet already issued.
15.00 ft: Action Stage. Water is 2.7 feet below adjacent floodplain properties. NWS may issue a Flash Flood Watch if not yet already issued.
3.67 ft: Right now

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

Weather at the gauge

The forecast is not available right now.

Sunrise 07:23 AM Sunset 06:27 PM Daylight 11 hr, 4 min First quarter 67%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Pescadero Creek near PescaderoRiver gauge, Pescadero Creek	2.2 cfs	Normal	−0.2 cfs	5.5 mi
Butano Creek near PescaderoRiver gauge, Butano Creek	0.9 cfs	Low	±0	6 mi
Pilarcitos C A Half Moon BayRiver gauge	2.75 ft	Below flood stage	+0.01 ft	10 mi
San Francisquito C A Stanford UniversityRiver gauge	0.18 ft	Below flood stage	+0.01 ft	13 mi
Pilarcitos Creek below Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	1.5 cfs	Normal	±0	14 mi
Pilarcitos Creek above Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	3.4 cfs	Normal	−0.1 cfs	14 mi
San Mateo Creek below Lo Crystal Sp Reservoir near San MateoRiver gauge, San Mateo Creek	4.0 cfs	High	+0.3 cfs	14 mi
Pilarcitos Creek below Spillway near HillsboroughRiver gauge, Pilarcitos Creek	2.8 cfs	Normal	+0.1 cfs	15 mi

Questions and answers

What is flood stage for San Gregorio C A San Gregorio?

The official flood stage is 17.70 ft. The level is currently 14.03 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 Gregorio C A San Gregorio today?

On Oct 20, 2026, 03:15 AM PDT, the water level was 3.67 ft. Steady over the last 24 hours.

Is San Gregorio C A San Gregorio rising or falling?

Steady over the last 24 hours.

Is the level of San Gregorio C A San Gregorio normal?

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

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:11162570 (Agency page)
Coordinates: 37.32573, -122.38659 (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	3.67 ft	2026-10-20 10:15	Provisional
Flow	1.4 cfs	2026-10-20 10:15	Provisional

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How to cite

U.S. Geological Survey: San Gregorio C A San Gregorio (usgs:11162570). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/san-gregorio-c-a-san-gregorio

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