Coastal Flood Advisory
Starts in 2 h 55 min
When
From 8 AM Saturday to 3 PM PDT Thursday.
Where
Bay Shoreline locations of San Francisco Bay, Monterey Bay and Big Sur Coast.
Issued for this forecast zone · National Weather Service San Francisco CA
What, impacts and precautionsHide details
What
Up to 1.9ft of inundation above ground level is possible in low-lying areas near shorelines and tidal waterways.
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.
Additional details
At the San Francisco tidal gauge, high tide is expected to be 1.1 ft above normal (6.9 ft MLLW) at 10:39 AM Saturday 10/24, 1.4 ft above normal (7.2 ft MLLW) at 11:07 AM Sunday 10/25, 1.7 ft above normal (7.5 ft MLLW) at 11:39 AM Monday 10/26, 1.8 ft above normal (7.6 ft MLLW) at 12:15 PM Tuesday 10/27, 1.9 ft above normal (7.7 ft MLLW) at 12:56 PM Wednesday 10/28, and 1.7 ft above normal (7.5 ft MLLW) at 01:43 PM Thursday 10/29. These predictions include up to 1.0 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.
Precautionary actions
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.
Areas: San Francisco; North Bay Interior Valleys; San Francisco Bay Shoreline; Northern Monterey Bay; Southern Monterey Bay and Big Sur Coast
See it on weather.gov (opens in a new tab)

Observed 4:50 AM PDT at KSFO

Millbrae, CA weather

Clear and 52°11°.

Mostly agree

Now 52°11°

Clear

Wind: Calm; Up to 7 mph11 km/h through 5 PM
Dew point: 45°7°; Comfortable
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air today: 55Moderate; EPA forecast · PM2.5 (fine particles)
Pressure: 30.03 inHg1017 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Above 60°16° today by 11 AM
High 70°21° today at 3 PM
Below 60°16° tonight after 8 PM

This morningUp to 61°16° by 11 AM · Clear
This afternoonUp to 70°21° by 3 PM · Clear
TonightDown to 52°11° by 4 AM · Clear
Tomorrow morningUp to 61°16° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 70°21° by 3 PM · Mostly cloudy
Tomorrow nightDown to 53°12° by 4 AM · Partly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 5a	Clear	52°11° (likely 52°11° to 56°13°)	52°11°	0%	2 mph3 km/h from WNW, gusts 2 mph4 km/h	68%	1%	0
Sat 6a	Clear	52°11° (likely 51°11° to 56°13°)	52°11°	0%	2 mph3 km/h from WNW, gusts 2 mph4 km/h	71%	1%	0
Sat 7a	Sunny	52°11° (likely 51°11° to 55°13°)	52°11°	0%	2 mph3 km/h from NE, gusts 2 mph4 km/h	71%	1%	0
Sat 8a	Sunny	52°11° (likely 51°11° to 55°13°)	52°11°	0%	3 mph5 km/h from E, gusts 2 mph4 km/h	71%	1%	0
Sat 9a	Sunny	55°13° (likely 55°13° to 58°14°)	55°13°	0%	3 mph5 km/h from ESE, gusts 4 mph6 km/h	69%	1%	0
Sat 10a	Sunny	58°14° (likely 58°14° to 61°16°)	58°14°	0%	5 mph8 km/h from ENE, gusts 5 mph8 km/h	61%	1%	1
Sat 11a	Sunny	61°16° (likely 61°16° to 66°19°)	61°16°	0%	6 mph10 km/h from ENE, gusts 3 mph6 km/h	51%	0%	3
Sat 12p	Sunny	64°18° (likely 64°18° to 69°21°)	65°18°	0%	5 mph8 km/h from NE, gusts 5 mph8 km/h	47%	0%	4
Sat 1p	Sunny	67°19° (likely 65°18° to 71°22°)	67°19°	0%	5 mph8 km/h from NNE, gusts 4 mph7 km/h	44%	0%	4
Sat 2p	Sunny	69°21° (likely 66°19° to 72°22°)	69°21°	0%	3 mph5 km/h from N, gusts 5 mph7 km/h	39%	0%	4
Sat 3p	Sunny	70°21° (likely 67°19° to 73°23°)	70°21°	0%	5 mph8 km/h from NNW, gusts 5 mph9 km/h	41%	0%	3
Sat 4p	Sunny	70°21° (likely 67°19° to 72°22°)	70°21°	0%	6 mph10 km/h from WNW, gusts 8 mph13 km/h	41%	0%	2
Sat 5p	Sunny	69°21° (likely 65°18° to 69°21°)	69°21°	0%	7 mph11 km/h from W, gusts 10 mph16 km/h	41%	0%	2
Sat 6p	Clear	66°19° (likely 61°16° to 66°19°)	66°19°	0%	7 mph11 km/h from W, gusts 11 mph17 km/h	52%	0%	1
Sat 7p	Clear	60°16° (likely 58°14° to 63°17°)	60°16°	0%	7 mph11 km/h from W, gusts 10 mph17 km/h	62%	0%	0
Sat 8p	Clear	58°14° (likely 57°14° to 60°16°)	59°15°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	68%	0%	0
Sat 9p	Clear	57°14° (likely 56°13° to 59°15°)	57°14°	0%	2 mph3 km/h from W, gusts 8 mph13 km/h	70%	0%	0
Sat 10p	Clear	56°13° (likely 55°13° to 58°14°)	56°13°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	73%	1%	0
Sat 11p	Clear	56°13° (likely 53°12° to 57°14°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	70%	4%	0
Sun 12a	Clear	55°13° (likely 53°12° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	70%	0%	0
Sun 1a	Clear	54°12° (likely 52°11° to 56°13°)	54°12°	0%	0 mph0 km/h, gusts 3 mph6 km/h	71%	1%	0
Sun 2a	Clear	53°12° (likely 51°11° to 55°13°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	73%	2%	0
Sun 3a	Clear	53°12° (likely 50°10° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	75%	41%	0
Sun 4a	Mostly clear	52°11° (likely 50°10° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 2 mph4 km/h	76%	45%	0
Sun 5a	Partly cloudy	52°11° (likely 49°9° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	76%	54%	0
Sun 6a	Partly cloudy	51°11° (likely 48°9° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	80%	54%	0
Sun 7a	Partly sunny	51°11° (likely 48°9° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	84%	64%	0
Sun 8a	Cloudy	52°11° (likely 48°9° to 55°13°)	52°11°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	84%	75%	0
Sun 9a	Cloudy	54°12° (likely 52°11° to 57°14°)	54°12°	0%	2 mph3 km/h from E, gusts 4 mph7 km/h	82%	79%	1
Sun 10a	Cloudy	57°14° (likely 57°14° to 59°15°)	57°14°	0%	2 mph3 km/h from E, gusts 3 mph5 km/h	78%	75%	2
Sun 11a	Partly sunny	61°16° (likely 60°16° to 62°17°)	61°16°	0%	2 mph3 km/h from N, gusts 4 mph6 km/h	68%	72%	3
Sun 12p	Cloudy	65°18° (likely 63°17° to 65°18°)	65°18°	0%	2 mph3 km/h from N, gusts 4 mph6 km/h	63%	69%	4
Sun 1p	Partly sunny	67°19° (likely 64°18° to 67°19°)	67°19°	0%	2 mph3 km/h from N, gusts 5 mph9 km/h	57%	79%	4
Sun 2p	Cloudy	69°21° (likely 66°19° to 69°21°)	69°21°	0%	3 mph5 km/h from W, gusts 10 mph16 km/h	51%	84%	4
Sun 3p	Cloudy	70°21° (likely 64°18° to 70°21°)	70°21°	0%	3 mph5 km/h from W, gusts 12 mph19 km/h	51%	80%	4
Sun 4p	Cloudy	69°21° (likely 61°16° to 69°21°)	69°21°	0%	3 mph5 km/h from W, gusts 13 mph21 km/h	53%	82%	3
Sun 5p	Cloudy	67°19° (likely 60°16° to 67°19°)	67°19°	0%	5 mph8 km/h from W, gusts 13 mph21 km/h	53%	85%	1
Sun 6p	Partly cloudy	64°18° (likely 58°14° to 64°18°)	64°18°	0%	5 mph8 km/h from W, gusts 13 mph22 km/h	63%	82%	0
Sun 7p	Partly cloudy	61°16° (likely 56°13° to 61°16°)	61°16°	0%	5 mph8 km/h from W, gusts 12 mph19 km/h	69%	76%	0
Sun 8p	Mostly clear	58°14° (likely 55°13° to 58°14°)	58°14°	0%	2 mph3 km/h from WSW, gusts 10 mph16 km/h	73%	47%	0
Sun 9p	Mostly clear	56°13° (likely 54°12° to 57°14°)	56°13°	0%	2 mph3 km/h from WSW, gusts 9 mph14 km/h	75%	38%	0
Sun 10p	Mostly clear	56°13° (likely 53°12° to 57°14°)	56°13°	0%	2 mph3 km/h from WSW, gusts 8 mph13 km/h	75%	29%	0
Sun 11p	Clear	56°13° (likely 52°11° to 58°14°)	56°13°	0%	3 mph5 km/h from WSW, gusts 7 mph11 km/h	76%	42%	0
Mon 12a	Mostly clear	55°13° (likely 52°11° to 59°15°)	55°13°	0%	3 mph5 km/h from WSW, gusts 4 mph7 km/h	77%	39%	0
Mon 1a	Mostly clear	55°13° (likely 52°11° to 59°15°)	55°13°	0%	3 mph5 km/h from WSW, gusts 4 mph6 km/h	79%	38%	0
Mon 2a	Mostly clear	54°12° (likely 52°11° to 58°14°)	54°12°	0%	3 mph5 km/h from WSW, gusts 3 mph6 km/h	81%	36%	0
Mon 3a	Mostly clear	54°12° (likely 51°11° to 57°14°)	54°12°	0%	3 mph5 km/h from WSW, gusts 4 mph6 km/h	82%	38%	0
Mon 4a	Mostly clear	53°12° (likely 51°11° to 57°14°)	53°12°	0%	3 mph5 km/h from WSW, gusts 4 mph7 km/h	83%	43%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Sunny. High 71°22°, low 52°11°. Typical 71°22° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Official NWS forecast
Today: Sunny. High near 71, with temperatures falling to around 69 in the afternoon. North northeast wind 2 to 7 mph.
Tonight: Clear, with a low around 52. West northwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–73°23°
Low, likely
51°11°–55°13°
Typical high / low
71°22° / 52°11°
Wind
8 mph14 km/h, gusts 15 mph24 km/h
UV peak
5
Tomorrow, Oct 25. Cloudy. High 71°22°, low 52°11°. Typical 71°22° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 53°12°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 71. North northwest wind 0 to 5 mph.
Night: Mostly clear, with a low around 52. West wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–71°22°
Low, likely
48°9°–54°12°
Typical high / low
71°22° / 52°11°
Wind
11 mph17 km/h, gusts 17 mph27 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 65°18°, low 51°11°. Typical 70°21° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Mostly clear, with a low around 51.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–66°19°
Low, likely
51°11°–56°13°
Typical high / low
70°21° / 52°11°
Wind
10 mph17 km/h, gusts 23 mph37 km/h
UV peak
5
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 51°11°. Typical 70°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 53°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Partly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
50°10°–55°13°
Typical high / low
70°21° / 52°11°
Wind
11 mph18 km/h, gusts 16 mph26 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 65°18°, low 52°11°. Typical 70°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65.
Night: Mostly cloudy, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–65°18°
Low, likely
50°10°–54°12°
Typical high / low
70°21° / 52°11°
Wind
9 mph14 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 63°17°, low 52°11°. Typical 70°21° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain after 5pm. Mostly sunny, with a high near 63.
Night: A chance of rain. Partly cloudy, with a low around 52.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–64°18°
Low, likely
52°11°–57°14°
Typical high / low
70°21° / 52°11°
Wind
11 mph18 km/h, gusts 24 mph38 km/h
UV peak
4
Friday, Oct 30. Rain. High 63°17°, low 52°11°. Typical 69°21° / 51°11°. Rain 0.01 in0.3 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 56°14°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 63.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–63°17°
Low, likely
51°11°–53°12°
Typical high / low
69°21° / 51°11°
Wind
10 mph16 km/h, gusts 22 mph36 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 61°16°, low 50°10°. Typical 69°21° / 51°11°. Rain 0.03 in0.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 62°16°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 57°14°
  20% chance
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  20% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–66°19°
Low, likely
47°8°–54°12°
Typical high / low
69°21° / 51°11°
Wind
8 mph13 km/h, gusts 20 mph31 km/h
UV peak
4
Sunday, Nov 1. Sunny. High 63°17°, low 50°10°. Typical 69°21° / 51°11°. Rain, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–68°20°
Low, likely
48°9°–54°12°
Typical high / low
69°21° / 51°11°
Wind
13 mph20 km/h, gusts 30 mph48 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 64°18°, low 55°13°. Typical 68°20° / 51°11°. Rain 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  20% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–69°21°
Low, likely
51°11°–62°17°
Typical high / low
68°20° / 51°11°
Wind
8 mph12 km/h, gusts 26 mph42 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 71°, low 52°.
Tomorrow
Dry, high 71°, low 52°.
Monday
Dry, high 65°, low 51°, cooling off.
Rest of week
Mostly dry, highs 61–65°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (MTR) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Green Hills Creek at Green Hill Country Club

0.4 mi

Level: 0.1 ft

Reading from Sat 3:18 AM · NWS gauge page

San Andreas Lake near Millbrae

1.4 mi

Level: 447 ft
Flow: 16,600 cfs

Reading from Sat 2:45 AM · NWS gauge page

El Zanjon Creek at First Avenue

1.7 mi

Level: 0.1 ft

Reading from Fri 11:03 PM · NWS gauge page

San Mateo Creek above Junction Box

3.0 mi

Level: 0.0 ft

Reading from Sat 3:30 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 51% less heating than a typical week.

This week 14Typical 28

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 45°F).

Open the windows?

Today, 11:00 AM–7:00 PM

Good stretch to open the windows.

Is this typical?

San Francisco International Airport · official normals 1991–2020 · records 1945–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 1° colder than normal (daily mean temperature).

−1°SunOct 18
−2°−1°MonOct 19
−1°TueOct 20
±0°WedOct 21
−1°ThuOct 22
—FriOct 23
—SatOct 24

Millbrae weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 54 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 20 min less
Golden hour: 5:44–6:36 PM; Morning 7:10–8:02 AM
Blue hour: 6:36–6:46 PM; Morning 7:00–7:10 AM; first light 7:00 AM

Stars tonight? Fair

Clear 5:05–7 AM, but the moon is 96% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:48 AM · rises 5:19 PM
Full moon: Oct 25
New moon: Nov 8

Looking northeast from Millbrae. The highest point on the skyline is about 4,300 ft, 46 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Coastal Flood Advisory