San Andreas Lake A Dam near Millbrae water level

Name: San Andreas Lake A Dam near Millbrae water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

Reservoir, San Andreas Lake A Dam, California, United States

Directions

Latest reading

Surface elevation

446.82ft Steady over the last 24 hours

Measured Oct 20, 2026, 01:45 AM PDT (47 min ago)

History

7 days

Surface elevation

What this means

San Andreas Lake A Dam near Millbrae reads 446.82 ft as of Oct 20, 2026, 01:45 AM PDT. The agency publishes no normal range or warning level for this reservoir yet, so there is nothing to judge the number against.

The level has held steady over the past 24 hours. In the last month it has stayed between 446.82 ft and 446.88 ft.

The agency publishes no normal range for this gauge yet, so we show the trend only. How to read levels

On the water at San Andreas Lake A Dam near Millbrae

Watch the chart rather than the single number; it shows whether the shoreline is moving.

Wear a life jacket on the water. Most boating deaths involve people who were not wearing one.

Weather at the gauge

No rain in the last 3 days.

19 Mon 62° 53° – Wind 13 mph

20 Tue 67° 49° – Wind 9 mph

21 Wed 64° 52° 0.26 in, 41% Wind 9 mph

22 Thu 60° 53° 0.16 in, 41% Wind 8 mph

23 Fri 70° 52° – Wind 9 mph

24 Sat 77° 53° – Wind 5 mph

25 Sun 77° 59° – Wind 5 mph

Forecast: Open-Meteo

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
Pilarcitos Lake near HillsboroughLake, Pilarcitos Lake	679.69 ft	Below flood stage	−0.06 ft	3.7 mi
Pilarcitos Creek below Spillway near HillsboroughRiver gauge, Pilarcitos Creek	2.8 cfs	Normal	±0	3.8 mi
Pilarcitos Creek above Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	3.5 cfs	Normal	±0	5.4 mi
Pilarcitos Creek below Stone Dam near HillsboroughRiver gauge, Pilarcitos Creek	1.5 cfs	Normal	±0	5.6 mi
San Mateo Creek below Lo Crystal Sp Reservoir near San MateoRiver gauge, San Mateo Creek	4.0 cfs	High	+0.3 cfs	6 mi
Pilarcitos C A Half Moon BayRiver gauge	2.74 ft	Below flood stage	±0	9 mi
San Lorenzo C A San LorenzoRiver gauge	1.3 cfs	Normal	−0.1 cfs	17 mi
San Francisquito C A Stanford UniversityRiver gauge	0.18 ft	Below flood stage	+0.01 ft	18 mi

Questions and answers

Is San Andreas Lake A Dam near Millbrae really 446.82 ft deep?

No. 446.82 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of San Andreas Lake A Dam near Millbrae today?

On Oct 20, 2026, 01:45 AM PDT, the surface elevation was 446.82 ft. Steady over the last 24 hours.

Is San Andreas Lake A Dam near Millbrae rising or falling?

Steady over the last 24 hours.

Is the level of San Andreas Lake A Dam near Millbrae normal?

The agency publishes no normal range for this gauge yet, so we show the trend only.

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:11162730 (Agency page)
Coordinates: 37.60272, -122.42822 (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
Surface elevation	446.82 ft	2026-10-20 08:45	Provisional

Download

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How to cite

U.S. Geological Survey: San Andreas Lake A Dam near Millbrae (usgs:11162730). Accessed October 20, 2026 via Nivelmap, https://nivelmap.com/en/united-states/california/san-andreas-lake-a-dam-near-millbrae

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