Coastal Flood Advisory
Starts in 2 days 3 h
When
From 9 AM Monday to 3 PM PDT Thursday.
Where
Pacific 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 1.7 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: Coastal North Bay Including Point Reyes National Seashore; San Francisco Peninsula Coast
See it on weather.gov (opens in a new tab)

Observed 4:40 AM PDT at KSFO

Moss Beach, CA weather

Clear and 52°11°.

Mostly agree

Now 52°11°

Clear

Wind: Calm; Up to 8 mph13 km/h through 5 PM
Dew point: 45°7°; Comfortable
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air today: 36Good; EPA forecast · Ozone
Pressure: 30.02 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 65°18° today at 2 PM
Below 60°16° tonight after 7 PM
Fog tomorrow night from midnight

This morningUp to 60°16° by 11 AM · Clear
This afternoonNear 64°18° · Clear
TonightDown to 49°9° by 5 AM · Clear
Tomorrow morningUp to 60°16° by 11 AM · Mostly cloudy
Tomorrow afternoonNear 63°17° · Mostly cloudy
Tomorrow nightDown to 51°11° 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	49°9° (likely 49°9° to 56°13°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	79%	2%	0
Sat 6a	Clear	50°10° (likely 50°10° to 55°13°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	80%	1%	0
Sat 7a	Sunny	49°9° (likely 49°9° to 55°13°)	49°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	76%	1%	0
Sat 8a	Sunny	49°9° (likely 49°9° to 55°13°)	47°8°	0%	3 mph5 km/h from N, gusts 4 mph7 km/h	78%	1%	0
Sat 9a	Sunny	54°12° (likely 54°12° to 57°14°)	54°12°	0%	6 mph10 km/h from NNE, gusts 5 mph8 km/h	77%	1%	0
Sat 10a	Sunny	58°14° (likely 58°14° to 62°17°)	58°14°	0%	7 mph11 km/h from NNE, gusts 6 mph10 km/h	65%	1%	1
Sat 11a	Sunny	60°16° (likely 60°16° to 66°19°)	61°16°	0%	7 mph11 km/h from NNE, gusts 7 mph12 km/h	56%	0%	3
Sat 12p	Sunny	63°17° (likely 63°17° to 68°20°)	63°17°	0%	7 mph11 km/h from N, gusts 9 mph15 km/h	52%	0%	4
Sat 1p	Sunny	64°18° (likely 64°18° to 68°20°)	64°18°	0%	6 mph10 km/h from NNW, gusts 11 mph18 km/h	52%	0%	4
Sat 2p	Sunny	65°18° (likely 65°18° to 69°21°)	65°18°	0%	6 mph10 km/h from NNW, gusts 11 mph17 km/h	53%	0%	4
Sat 3p	Sunny	65°18° (likely 64°18° to 69°21°)	65°18°	0%	7 mph11 km/h from NNW, gusts 10 mph16 km/h	54%	0%	3
Sat 4p	Sunny	65°18° (likely 63°17° to 69°21°)	65°18°	0%	7 mph11 km/h from NNW, gusts 10 mph15 km/h	55%	1%	2
Sat 5p	Sunny	65°18° (likely 62°17° to 68°20°)	65°18°	0%	8 mph13 km/h from NW, gusts 9 mph15 km/h	55%	2%	2
Sat 6p	Clear	63°17° (likely 60°16° to 65°18°)	63°17°	0%	7 mph11 km/h from NNW, gusts 9 mph14 km/h	65%	1%	1
Sat 7p	Clear	59°15° (likely 57°14° to 62°17°)	59°15°	0%	6 mph10 km/h from NNW, gusts 7 mph12 km/h	75%	4%	0
Sat 8p	Clear	58°14° (likely 56°13° to 59°15°)	58°14°	0%	5 mph8 km/h from NNW, gusts 6 mph10 km/h	82%	6%	0
Sat 9p	Mostly clear	56°13° (likely 55°13° to 59°15°)	56°13°	0%	0 mph0 km/h, gusts 5 mph7 km/h	86%	15%	0
Sat 10p	Clear	55°13° (likely 54°12° to 58°14°)	55°13°	0%	0 mph0 km/h, gusts 3 mph5 km/h	84%	16%	0
Sat 11p	Partly cloudy	54°12° (likely 53°12° to 57°14°)	54°12°	0%	0 mph0 km/h, gusts 2 mph4 km/h	86%	23%	0
Sun 12a	Mostly clear	53°12° (likely 53°12° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	86%	29%	0
Sun 1a	Partly cloudy	52°11° (likely 52°11° to 57°14°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	87%	26%	0
Sun 2a	Partly cloudy	51°11° (likely 51°11° to 56°13°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	88%	22%	0
Sun 3a	Clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	88%	43%	0
Sun 4a	Partly cloudy	50°10° (likely 50°10° to 55°13°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	88%	47%	0
Sun 5a	Mostly cloudy	49°9° (likely 49°9° to 55°13°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	50%	0
Sun 6a	Mostly cloudy	48°9° (likely 48°9° to 55°13°)	48°9°	0%	0 mph0 km/h, gusts 3 mph6 km/h	89%	53%	0
Sun 7a	Mostly cloudy	48°9° (likely 48°9° to 55°13°)	48°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	68%	0
Sun 8a	Mostly cloudy	48°9° (likely 48°9° to 55°13°)	48°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	89%	75%	0
Sun 9a	Cloudy	52°11° (likely 52°11° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 2 mph4 km/h	89%	76%	1
Sun 10a	Cloudy	57°14° (likely 56°13° to 59°15°)	57°14°	0%	0 mph0 km/h, gusts 3 mph5 km/h	84%	62%	2
Sun 11a	Cloudy	60°16° (likely 58°14° to 62°17°)	60°16°	0%	0 mph0 km/h, gusts 4 mph6 km/h	76%	62%	3
Sun 12p	Cloudy	62°17° (likely 60°16° to 64°18°)	62°17°	0%	0 mph0 km/h, gusts 4 mph6 km/h	72%	62%	4
Sun 1p	Cloudy	63°17° (likely 60°16° to 66°19°)	63°17°	0%	0 mph0 km/h, gusts 6 mph9 km/h	71%	80%	4
Sun 2p	Cloudy	63°17° (likely 60°16° to 66°19°)	63°17°	0%	3 mph5 km/h from W, gusts 9 mph15 km/h	71%	83%	4
Sun 3p	Cloudy	64°18° (likely 60°16° to 65°18°)	64°18°	0%	3 mph5 km/h from W, gusts 8 mph14 km/h	71%	79%	4
Sun 4p	Cloudy	64°18° (likely 58°14° to 65°18°)	64°18°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	71%	83%	3
Sun 5p	Cloudy	63°17° (likely 58°14° to 64°18°)	63°17°	0%	0 mph0 km/h, gusts 8 mph13 km/h	71%	86%	1
Sun 6p	Cloudy	61°16° (likely 58°14° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 8 mph13 km/h	77%	84%	0
Sun 7p	Cloudy	59°15° (likely 58°14° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 8 mph12 km/h	81%	77%	0
Sun 8p	Cloudy	57°14° (likely 57°14° to 59°15°)	57°14°	0%	0 mph0 km/h, gusts 7 mph12 km/h	85%	67%	0
Sun 9p	Cloudy	55°13° (likely 55°13° to 58°14°)	55°13°	0%	0 mph0 km/h, gusts 7 mph12 km/h	88%	66%	0
Sun 10p	Partly cloudy	54°12° (likely 54°12° to 58°14°)	54°12°	0%	0 mph0 km/h, gusts 7 mph11 km/h	90%	68%	0
Sun 11p	Cloudy	53°12° (likely 53°12° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	92%	70%	0
Mon 12a	Fog	53°12° (likely 53°12° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	94%	42%	0
Mon 1a	Fog	52°11° (likely 52°11° to 57°14°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	95%	40%	0
Mon 2a	Fog	52°11° (likely 52°11° to 57°14°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	39%	0
Mon 3a	Fog	52°11° (likely 52°11° to 57°14°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	96%	41%	0
Mon 4a	Fog	51°11° (likely 51°11° to 57°14°)	51°11°	0%	0 mph0 km/h, gusts 5 mph9 km/h	97%	45%	0

Days ahead

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

Today, Oct 24. Mostly sunny. High 65°18°, low 48°9°. Typical 71°22° / 52°11°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Today: Sunny, with a high near 65. North wind 0 to 8 mph.
Tonight: Mostly clear, with a low around 48. Wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 65°18°).
High, likely
65°18°–70°21°
Low, likely
48°9°–55°13°
Typical high / low
71°22° / 52°11°
Wind
10 mph16 km/h
UV peak
5
Tomorrow, Oct 25. Fog. High 64°18°, low 49°9°. Typical 71°22° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 51°11°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 64. Northwest wind 0 to 3 mph.
Night: Areas of fog after midnight. Mostly cloudy, with a low around 49. Wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–67°19°
Low, likely
49°9°–54°12°
Typical high / low
71°22° / 52°11°
Wind
9 mph14 km/h, gusts 14 mph23 km/h
UV peak
4
Monday, Oct 26. Fog. High 61°16°, low 48°9°. Typical 70°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 8am. Mostly sunny, with a high near 61.
Night: Partly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
48°9°–57°14°
Typical high / low
70°21° / 52°11°
Wind
12 mph19 km/h, gusts 23 mph37 km/h
UV peak
5
Tuesday, Oct 27. Cloudy. High 60°16°, low 48°9°. Typical 70°21° / 52°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 60.
Night: Mostly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–66°19°
Low, likely
48°9°–55°13°
Typical high / low
70°21° / 52°11°
Wind
12 mph20 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 62°17°, low 49°9°. Typical 70°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 9am. Mostly cloudy, with a high near 62.
Night: Mostly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–65°18°
Low, likely
49°9°–55°13°
Typical high / low
70°21° / 52°11°
Wind
13 mph21 km/h
UV peak
4
Thursday, Oct 29. Rain. High 60°16°, low 49°9°. Typical 70°21° / 52°11°. Rain, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 57°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: Patchy fog between 7am and 8am, then a slight chance of rain. Partly sunny, with a high near 60.
Night: A chance of rain. Mostly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
49°9°–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 60°16°, low 53°12°. Typical 69°21° / 51°11°. Rain 0.02 in0.5 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 51°10°
  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 60.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–61°16°
Low, likely
51°11°–54°12°
Typical high / low
69°21° / 51°11°
Wind
13 mph21 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. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 55°13°
  20% chance
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–67°19°
Low, likely
48°9°–53°12°
Typical high / low
69°21° / 51°11°
Wind
11 mph18 km/h, gusts 20 mph31 km/h
UV peak
4
Sunday, Nov 1. Sunny. High 64°18°, low 50°10°. Typical 69°21° / 51°11°. Rain, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 58°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°–71°22°
Low, likely
47°8°–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 63°17°, 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, 65°18°
  20% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Cloudy, 58°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
60°16°–67°19°
Low, likely
52°11°–60°16°
Typical high / low
68°20° / 51°11°
Wind
9 mph15 km/h, gusts 26 mph42 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 65°, low 48°.
Tomorrow
Dry, high 64°, low 49°.
Monday
Dry, high 61°, low 48°, cooling off.
Rest of week
Mostly dry, highs 60–64°.

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

Pilarcitos Creek at Half Moon Bay

4.8 mi

Level: 2.9 ft
Flow: 14 cfs

Reading from Sat 3 AM · NWS gauge page

Pilarcitos Lake

4.8 mi

Below flood stage

Level: 677 ft

Reading from Sat 3 AM · NWS gauge page

Pilarcitos Creek below Pilarcitos Lake Spillway

4.9 mi

Level: 2.5 ft
Flow: 3 cfs

Reading from Sat 3:15 AM · NWS gauge page

San Mateo Creek below Junction Box

5.3 mi

Level: 0.3 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 39% less heating than a typical week.

This week 17Typical 28

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 45°F).

Open the windows?

Today, 11:00 AM–6:00 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 6°3° colder than typical.

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

Moss Beach 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: 5:44–6:37 PM; Morning 7:10–8:03 AM
Blue hour: 6:37–6:47 PM; Morning 7:00–7:10 AM; first light 7:00 AM

Stars tonight? Fair

Clear 5:03–7 AM, but the moon is 96% lit and up.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:48 AM · rises 5:20 PM
Full moon: Oct 25
New moon: Nov 8

Looking southwest from Moss Beach. Open water to the horizon.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