Coastal Flood Advisory
Starts in 6 h 21 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 1:20 AM PDT at KSFO

Emerald Lake Hills, CA weather

Clear and 57°14°.

Mostly agree

Now 57°14°

Clear

Wind: Calm; Up to 5 mph8 km/h through 1 PM
Dew point: 52°11°; Comfortable · down to 42°6° by 2 AM
UV index: 0Low; Moderate 11 AM–5 PM · peak 5
Air quality: 46Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.03 inHg1017 hPa; Steady over the next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 49°9° today at 7 AM
Above 60°16° today by 11 AM
High 71°22° today at 3 PM
Below 60°16° tonight after 8 PM

TonightNear 52°11° · Clear
This morningUp to 60°16° by 11 AM · Clear
This afternoonUp to 71°22° by 3 PM · Clear
TonightDown to 50°10° by 4 AM · Clear
Tomorrow morningUp to 63°17° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 72°22° by 3 PM · Mostly cloudy
Tomorrow nightDown to 53°12° by midnight · Mostly 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 1a	Clear	53°12° (likely 52°11° to 56°13°)	53°12°	0%	2 mph3 km/h from WNW, gusts 4 mph7 km/h	69%	0%	0
Sat 2a	Clear	52°11° (likely 52°11° to 55°13°)	52°11°	0%	1 mph2 km/h from NW, gusts 6 mph10 km/h	71%	0%	0
Sat 3a	Clear	51°11° (likely 51°11° to 55°13°)	51°11°	0%	1 mph2 km/h from WNW, gusts 4 mph7 km/h	69%	0%	0
Sat 4a	Clear	51°11° (likely 51°11° to 54°12°)	51°11°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	68%	1%	0
Sat 5a	Clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	1 mph2 km/h from WNW, gusts 4 mph7 km/h	67%	1%	0
Sat 6a	Clear	50°10° (likely 50°10° to 55°13°)	50°10°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	65%	1%	0
Sat 7a	Sunny	49°9° (likely 49°9° to 55°13°)	49°9°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	67%	1%	0
Sat 8a	Sunny	50°10° (likely 50°10° to 54°12°)	50°10°	0%	2 mph3 km/h from NNE, gusts 4 mph6 km/h	66%	1%	0
Sat 9a	Sunny	53°12° (likely 53°12° to 59°15°)	53°12°	0%	2 mph3 km/h from NNE, gusts 3 mph5 km/h	65%	1%	1
Sat 10a	Sunny	56°13° (likely 56°13° to 64°18°)	56°13°	0%	3 mph5 km/h from NE, gusts 3 mph5 km/h	58%	1%	2
Sat 11a	Sunny	60°16° (likely 60°16° to 67°19°)	60°16°	0%	5 mph8 km/h from NE, gusts 5 mph8 km/h	49%	1%	3
Sat 12p	Sunny	64°18° (likely 62°17° to 70°21°)	65°18°	0%	5 mph8 km/h from NNE, gusts 5 mph8 km/h	44%	1%	4
Sat 1p	Sunny	67°19° (likely 64°18° to 72°22°)	67°19°	0%	5 mph8 km/h from NNE, gusts 6 mph10 km/h	42%	0%	5
Sat 2p	Sunny	69°21° (likely 66°19° to 73°23°)	69°21°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	40%	0%	5
Sat 3p	Sunny	71°22° (likely 67°19° to 74°23°)	71°22°	0%	3 mph5 km/h from N, gusts 7 mph11 km/h	37%	0%	4
Sat 4p	Sunny	71°22° (likely 67°19° to 74°23°)	71°22°	0%	5 mph8 km/h from N, gusts 7 mph11 km/h	37%	0%	3
Sat 5p	Sunny	71°22° (likely 66°19° to 72°22°)	71°22°	0%	5 mph8 km/h from NNW, gusts 7 mph11 km/h	37%	0%	2
Sat 6p	Clear	68°20° (likely 62°17° to 68°20°)	68°20°	0%	3 mph5 km/h from NW, gusts 7 mph11 km/h	44%	0%	1
Sat 7p	Clear	62°17° (likely 58°14° to 64°18°)	62°17°	0%	2 mph3 km/h from W, gusts 9 mph14 km/h	49%	0%	0
Sat 8p	Clear	59°15° (likely 56°13° to 61°16°)	59°15°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	52%	0%	0
Sat 9p	Clear	57°14° (likely 54°12° to 58°14°)	57°14°	0%	1 mph2 km/h from SSW, gusts 4 mph6 km/h	58%	2%	0
Sat 10p	Clear	55°13° (likely 53°12° to 57°14°)	55°13°	0%	1 mph2 km/h from SSW, gusts 4 mph6 km/h	62%	1%	0
Sat 11p	Clear	54°12° (likely 52°11° to 56°13°)	54°12°	0%	1 mph2 km/h from SSW, gusts 3 mph5 km/h	63%	2%	0
Sun 12a	Clear	53°12° (likely 52°11° to 56°13°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	62%	0%	0
Sun 1a	Clear	53°12° (likely 51°11° to 55°13°)	53°12°	0%	0 mph0 km/h, gusts 3 mph4 km/h	62%	0%	0
Sun 2a	Clear	52°11° (likely 51°11° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 2 mph3 km/h	65%	0%	0
Sun 3a	Clear	51°11° (likely 50°10° to 55°13°)	51°11°	0%	0 mph0 km/h, gusts 2 mph4 km/h	66%	34%	0
Sun 4a	Partly cloudy	50°10° (likely 49°9° to 55°13°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	67%	51%	0
Sun 5a	Partly cloudy	50°10° (likely 48°9° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 2 mph4 km/h	68%	50%	0
Sun 6a	Clear	49°9° (likely 48°9° to 54°12°)	49°9°	0%	0 mph0 km/h, gusts 1 mph2 km/h	68%	16%	0
Sun 7a	Partly sunny	49°9° (likely 48°9° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 2 mph4 km/h	72%	58%	0
Sun 8a	Mostly cloudy	49°9° (likely 48°9° to 53°12°)	49°9°	0%	1 mph2 km/h from ESE, gusts 3 mph5 km/h	74%	60%	0
Sun 9a	Mostly cloudy	53°12° (likely 53°12° to 56°13°)	53°12°	0%	1 mph2 km/h from ESE, gusts 4 mph6 km/h	74%	63%	1
Sun 10a	Cloudy	59°15° (likely 57°14° to 60°16°)	59°15°	0%	1 mph2 km/h from ESE, gusts 4 mph6 km/h	67%	66%	2
Sun 11a	Cloudy	63°17° (likely 60°16° to 64°18°)	63°17°	0%	2 mph3 km/h from NNW, gusts 5 mph8 km/h	59%	71%	3
Sun 12p	Partly sunny	67°19° (likely 62°17° to 67°19°)	67°19°	0%	2 mph3 km/h from NNW, gusts 4 mph7 km/h	55%	68%	4
Sun 1p	Partly sunny	69°21° (likely 64°18° to 69°21°)	69°21°	0%	2 mph3 km/h from NNW, gusts 5 mph8 km/h	54%	65%	4
Sun 2p	Mostly sunny	70°21° (likely 65°18° to 70°21°)	70°21°	0%	3 mph5 km/h from WNW, gusts 5 mph8 km/h	51%	80%	4
Sun 3p	Cloudy	72°22° (likely 66°19° to 72°22°)	72°22°	0%	3 mph5 km/h from WNW, gusts 8 mph13 km/h	49%	78%	4
Sun 4p	Cloudy	71°22° (likely 66°19° to 71°22°)	71°22°	0%	3 mph5 km/h from WNW, gusts 11 mph18 km/h	49%	82%	3
Sun 5p	Cloudy	70°21° (likely 63°17° to 70°21°)	70°21°	0%	2 mph3 km/h from W, gusts 11 mph18 km/h	49%	86%	2
Sun 6p	Cloudy	67°19° (likely 60°16° to 67°19°)	67°19°	0%	2 mph3 km/h from W, gusts 11 mph18 km/h	56%	85%	1
Sun 7p	Cloudy	62°17° (likely 57°14° to 62°17°)	62°17°	0%	2 mph3 km/h from W, gusts 11 mph18 km/h	62%	83%	0
Sun 8p	Cloudy	58°14° (likely 54°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 10 mph16 km/h	66%	79%	0
Sun 9p	Clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 9 mph14 km/h	70%	41%	0
Sun 10p	Clear	54°12° (likely 51°11° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 7 mph11 km/h	74%	43%	0
Sun 11p	Clear	54°12° (likely 50°10° to 55°13°)	54°12°	0%	1 mph2 km/h from WSW, gusts 6 mph10 km/h	77%	46%	0
Mon 12a	Partly cloudy	53°12° (likely 51°11° to 56°13°)	53°12°	0%	1 mph2 km/h from WSW, gusts 4 mph6 km/h	79%	52%	0

Days ahead

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

Today, Oct 24. Sunny. High 71°22°, low 49°9°. Typical 71°22° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Today: Sunny, with a high near 71. North northeast wind 1 to 5 mph.
Tonight: Mostly clear, with a low around 49. West northwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–74°23°
Low, likely
49°9°–53°12°
Typical high / low
71°22° / 52°11°
Wind
8 mph13 km/h
UV peak
5
Tomorrow, Oct 25. Cloudy. High 73°23°, low 49°9°. Typical 71°22° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 73. North northwest wind 0 to 3 mph.
Night: Partly cloudy, with a low around 49. West southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–73°23°
Low, likely
48°9°–53°12°
Typical high / low
71°22° / 52°11°
Wind
8 mph12 km/h, gusts 16 mph25 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 67°19°, low 48°9°. Typical 70°21° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 67.
Night: Mostly clear, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
64°18°–67°19°
Low, likely
48°9°–54°12°
Typical high / low
70°21° / 52°11°
Wind
10 mph16 km/h, gusts 22 mph36 km/h
UV peak
5
Tuesday, Oct 27. Fog. High 66°19°, low 48°9°. Typical 70°21° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog between 8am and 9am. Sunny, with a high near 66.
Night: Partly cloudy, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
63°17°–66°19°
Low, likely
48°9°–53°12°
Typical high / low
70°21° / 52°11°
Wind
9 mph15 km/h, gusts 17 mph27 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 66°19°, low 49°9°. Typical 70°21° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 66.
Night: Mostly cloudy, with a low around 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–66°19°
Low, likely
47°8°–53°12°
Typical high / low
70°21° / 52°11°
Wind
10 mph17 km/h
UV peak
4
Thursday, Oct 29. Rain. High 64°18°, low 50°10°. Typical 70°21° / 52°11°. Rain 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 52°11°
  20% chance · 0.01 in0.3 mm
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 64.
Night: A chance of rain. Partly cloudy, with a low around 50.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–65°18°
Low, likely
50°10°–54°12°
Typical high / low
70°21° / 52°11°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
4
Friday, Oct 30. Rain. High 64°18°, low 50°10°. Typical 69°21° / 51°11°. Rain 0.07 in1.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 51°11°
  30% chance · 0.02 in0.6 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 61°16°
  30% chance · 0.04 in0.9 mm
3. Evening
  6 PM–midnight
  Partly cloudy, 53°12°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 49°10°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 64.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–66°19°
Low, likely
48°9°–52°11°
Typical high / low
69°21° / 51°11°
Wind
9 mph14 km/h, gusts 18 mph28 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 62°17°, low 47°8°. Typical 69°21° / 51°11°. Rain 0.02 in0.5 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 55°13°
  30% chance
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  30% 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–69°21°
Low, likely
43°6°–50°10°
Typical high / low
69°21° / 51°11°
Wind
8 mph12 km/h, gusts 15 mph24 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 65°18°, low 47°8°. Typical 69°21° / 51°11°. Rain, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 59°15°
  20% chance
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–70°21°
Low, likely
41°5°–54°12°
Typical high / low
69°21° / 51°11°
Wind
8 mph14 km/h, gusts 18 mph29 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 67°19°, low 52°11°. Typical 68°20° / 51°11°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  30% chance
3. Evening
  6 PM–midnight
  Partly cloudy, 57°14°
  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
62°17°–77°25°
Low, likely
49°9°–57°14°
Typical high / low
68°20° / 51°11°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 71°, low 49°.
Tomorrow
Dry, high 73°, low 49°.
Monday
Dry, high 67°, low 48°, cooling off.
Rest of week
Mostly dry, highs 62–67°.

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

San Francisquito Creek at Stanford University

5.1 mi

Below flood stage

Level: 0.3 ft
Flow: under 1 cfs

Forecast peak 0.3 ft Sat 1 AM

Reading from Sat 12:15 AM · NWS gauge page

Atherton Channel at Las Lomitas School

3.5 mi

Level: 0.1 ft

Reading from Sat 12 AM · NWS gauge page

Belmont Creek at Harbor Blvd at Old County Road

3.6 mi

Below flood stage

Level: 0.1 ft

Reading from Fri 4:16 PM · NWS gauge page

Atherton Channel upstream of Caltrain

3.9 mi

Level: 0.1 ft

Reading from Fri 6:12 PM · NWS gauge page

For your home

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

Heating this week

About 45% less heating than a typical week.

This week 15Typical 28

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 52°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

Emerald Lake Hills 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 19 min less
Golden hour: 5:43–6:36 PM; Morning 7:09–8:02 AM
Blue hour: 6:36–6:46 PM; Morning 6:59–7:09 AM; first light 6:59 AM

Stars tonight? Good

Clear 1:39–6:59 AM; moon 96% lit, sets 5:47 AM.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:47 AM · rises 5:19 PM
Full moon: Oct 25
New moon: Nov 8

Looking south from Emerald Lake Hills. The highest point on the skyline is about 3,400 ft, 29 mi away.Skyline from USGS elevation data, heights drawn up to 4× taller. Sky, sun and moon as they are now.

1 active weather alert

Coastal Flood Advisory