California · NWS MTR office

Millbrae, CA weather

It is 55°F and clear at San Francisco, San Francisco International Airport as of Oct 27, 11:00 PM PDT. Tonight: Mostly Clear, low near 51°F. Forecast from the National Weather Service, issued Oct 27, 3:07 PM PDT.

Updated Oct 27, 11:30 PM PDT (snapshot)

Current conditions

Temperature

55°F

Clear

Wind

—

Humidity 88% · dew point 52°F

Pressure · visibility

30.01 inHg

Visibility 10 mi

Observed at San Francisco, San Francisco International Airport (KSFO), Oct 27, 11:00 PM PDT. Station readings can lag or be missing.

Alerts for this area

Coastal Flood Advisory Minor Expected

Coastal Flood Advisory issued October 27 at 3:11PM PDT until October 30 at 5:00PM PDT by NWS San Francisco CA

Area
San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
In effect
Oct 27, 3:11 PM PDT
Until
Oct 30, 5:00 PM PDT
Issued by
NWS San Francisco CA
Full text

* WHAT...Up to 2.1 ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways. * WHERE...Bay Shoreline locations of San Pablo Bay, San Francisco Bay, and Monterey Bay. * WHEN...Until 5 PM PDT Friday. * IMPACTS...High tides will result in flooding of low-lying infrastructure, isolated road closures, and coastal erosion. Rising tides will bring water and waves farther up the beach than normal, restricting escape from beaches and coastal areas. More substantial impacts are expected along bayshore Marin County where increased flooding is anticipated across low lying areas. * ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide is expected to be 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29, and 1.6 ft above normal (7.4 ft MLLW) at 02:39 PM Friday 10/30. These predictions include up to 1.2 ft of surge that will enhance the astronomical tide and flooding threat. High tide varies up to 90 minutes earlier or later along the Pacific Coast and through the San Francisco Bay, respectively.

What to do: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Around the NWS MTR forecast area

2 active alerts cover zones served by the MTR office near Millbrae:

  • Coastal Flood Advisory (2)

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. California has 8 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Millbrae (local time)
TimeTempForecastPrecip. chanceWind
Tue 11 PM54°FMostly Clear0%WNW 8 mph
Wed 12 AM54°FMostly Clear0%WNW 5 mph
Wed 1 AM53°FMostly Clear0%W 3 mph
Wed 2 AM52°FMostly Clear0%WNW 1 mph
Wed 3 AM51°FMostly Clear0%NW 2 mph
Wed 4 AM51°FMostly Clear0%NNW 2 mph
Wed 5 AM51°FMostly Clear0%N 3 mph
Wed 6 AM51°FMostly Sunny0%NE 3 mph
Wed 7 AM51°FMostly Sunny0%E 3 mph
Wed 8 AM51°FSunny0%ESE 3 mph
Wed 9 AM53°FSunny0%E 3 mph
Wed 10 AM55°FSunny0%NE 3 mph
Wed 11 AM58°FMostly Sunny0%NNE 5 mph
Wed 12 PM61°FMostly Sunny0%NNE 5 mph
Wed 1 PM63°FSunny0%N 5 mph
Wed 2 PM65°FSunny0%NNW 5 mph
Wed 3 PM66°FSunny0%WNW 7 mph
Wed 4 PM65°FSunny0%WNW 8 mph
Wed 5 PM64°FSunny0%W 9 mph
Wed 6 PM61°FMostly Clear0%W 9 mph
Wed 7 PM58°FPartly Cloudy0%W 8 mph
Wed 8 PM57°FPartly Cloudy0%W 7 mph
Wed 9 PM56°FMostly Clear0%W 5 mph
Wed 10 PM55°FPartly Cloudy0%W 3 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Millbrae can differ.

7-day forecast

Tonight

Low 51°F

Mostly clear, with a low around 51. Northwest wind 1 to 6 mph.

Wednesday

High 66°F·Low 52°F

Sunny. High near 66, with temperatures falling to around 63 in the afternoon. North wind 2 to 8 mph.

Wednesday Night: Mostly cloudy, with a low around 52. Southwest wind 1 to 8 mph.

Thursday

High 64°F·Low 53°F

Partly sunny, with a high near 64. Southeast wind 1 to 7 mph.

Thursday Night: Mostly cloudy, with a low around 53. West wind around 7 mph.

Friday

High 62°F·Low 51°F

Sunny, with a high near 62.

Friday Night: Partly cloudy, with a low around 51.

Saturday

High 60°F·Low 50°F

A slight chance of rain after 5pm. Partly sunny, with a high near 60.

Saturday Night: A chance of rain. Partly cloudy, with a low around 50.

Sunday

High 63°F·Low 51°F

A slight chance of rain before 10am. Sunny, with a high near 63.

Sunday Night: Mostly clear, with a low around 51.

Monday

High 69°F·Low 53°F

Mostly sunny, with a high near 69.

Monday Night: A slight chance of rain after 4am. Partly cloudy, with a low around 53.

Tuesday

High 68°F

A chance of rain before 5pm. Partly sunny, with a high near 68.

Nearby cities

Larger cities in the area

Other cities in San Mateo County

See every city we cover in California, or check all active alerts.

About this forecast

Forecast office
Millbrae is served by the National Weather Service MTR forecast office, forecast zone CAZ508, county zone CAC081.
Location used
The Census Bureau's internal point for Millbrae (37.5990, -122.4020), in San Mateo County. Population: 23,321 (2024 estimate), number 282 of the 296 California cities on this site.
Radar
Nearest NWS radar: KMUX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/37.599,-122.402 (forecast issued Oct 27, 3:07 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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