Coastal Flood Advisory
Ends in 5 days 4 h
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, 1.5 ft above normal (7.3 ft MLLW) at 11:07 AM Sunday 10/25, 1.6 ft above normal (7.4 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 9:55 AM PDT at KHWD

Hayward, CA weather

Sunny and 61°16°.

Mostly agree

Now 61°16°

Sunny

Wind: 3 mph5 km/h; From the east-northeast. Up to 7 mph11 km/h through 10 PM
Dew point: 48°9°; Comfortable
UV index: 1Low; Moderate 11 AM–4 PM · peak 4
Air quality: 27Good; Main pollutant: Ozone
Pressure: 30.06 inHg1018 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (61°16° then, 60°16° now)

Good hours for

High 69°21° today at 3 PM
Below 60°16° tonight after 9 PM
Low 51°11° tonight at 5 AM
Above 60°16° tomorrow by 11 AM

This morningNear 60°16° · Clear
This afternoonUp to 69°21° by 3 PM · Clear
TonightDown to 51°11° by 5 AM · Clear
Tomorrow morningUp to 62°17° 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
Monday morningNear 54°12° · 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 10a	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	3 mph5 km/h from ENE, gusts 4 mph7 km/h	62%	14%	1
Sat 11a	Sunny	61°16° (likely 61°16° to 65°18°)	61°16°	0%	5 mph8 km/h from N, gusts 8 mph14 km/h	58%	0%	3
Sat 12p	Sunny	65°18° (likely 65°18° to 69°21°)	65°18°	0%	5 mph8 km/h from WNW, gusts 9 mph15 km/h	53%	0%	4
Sat 1p	Sunny	66°19° (likely 66°19° to 71°22°)	67°19°	0%	5 mph8 km/h from W, gusts 9 mph15 km/h	52%	0%	4
Sat 2p	Sunny	68°20° (likely 67°19° to 72°22°)	68°20°	0%	6 mph10 km/h from W, gusts 9 mph14 km/h	50%	0%	4
Sat 3p	Sunny	69°21° (likely 68°20° to 73°23°)	69°21°	0%	6 mph10 km/h from WNW, gusts 8 mph13 km/h	50%	0%	3
Sat 4p	Sunny	69°21° (likely 69°21° to 72°22°)	69°21°	0%	7 mph11 km/h from WNW, gusts 7 mph12 km/h	50%	0%	2
Sat 5p	Sunny	68°20° (likely 68°20° to 71°22°)	68°20°	0%	7 mph11 km/h from WNW, gusts 10 mph16 km/h	54%	0%	2
Sat 6p	Clear	66°19° (likely 64°18° to 67°19°)	66°19°	0%	6 mph10 km/h from WNW, gusts 11 mph18 km/h	60%	0%	1
Sat 7p	Clear	62°17° (likely 60°16° to 62°17°)	62°17°	0%	5 mph8 km/h from NW, gusts 8 mph12 km/h	69%	0%	0
Sat 8p	Clear	60°16° (likely 56°13° to 60°16°)	60°16°	0%	2 mph3 km/h from NW, gusts 4 mph7 km/h	74%	2%	0
Sat 9p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	2 mph3 km/h from NW, gusts 3 mph5 km/h	76%	2%	0
Sat 10p	Clear	58°14° (likely 52°11° to 58°14°)	58°14°	0%	2 mph3 km/h from W, gusts 3 mph5 km/h	78%	1%	0
Sat 11p	Clear	57°14° (likely 51°11° to 57°14°)	57°14°	0%	2 mph3 km/h from SSE, gusts 3 mph4 km/h	81%	12%	0
Sun 12a	Clear	56°13° (likely 50°10° to 56°13°)	56°13°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	78%	0%	0
Sun 1a	Clear	55°13° (likely 48°9° to 55°13°)	55°13°	0%	2 mph3 km/h from ESE, gusts 4 mph7 km/h	76%	0%	0
Sun 2a	Clear	54°12° (likely 47°8° to 54°12°)	54°12°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	77%	4%	0
Sun 3a	Mostly clear	53°12° (likely 46°8° to 53°12°)	53°12°	0%	2 mph3 km/h from ESE, gusts 4 mph7 km/h	81%	44%	0
Sun 4a	Mostly clear	52°11° (likely 45°7° to 53°12°)	52°11°	0%	1 mph2 km/h from E, gusts 5 mph8 km/h	83%	54%	0
Sun 5a	Partly cloudy	51°11° (likely 44°7° to 52°11°)	51°11°	0%	2 mph3 km/h from ENE, gusts 5 mph8 km/h	84%	56%	0
Sun 6a	Partly cloudy	51°11° (likely 44°7° to 52°11°)	51°11°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	80%	64%	0
Sun 7a	Partly sunny	51°11° (likely 44°7° to 52°11°)	51°11°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	81%	62%	0
Sun 8a	Partly sunny	51°11° (likely 44°7° to 53°12°)	51°11°	0%	1 mph2 km/h from E, gusts 4 mph7 km/h	83%	70%	0
Sun 9a	Partly sunny	55°13° (likely 49°9° to 57°14°)	55°13°	0%	1 mph2 km/h from E, gusts 5 mph7 km/h	81%	72%	1
Sun 10a	Cloudy	59°15° (likely 57°14° to 61°16°)	59°15°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	76%	79%	2
Sun 11a	Cloudy	62°17° (likely 61°16° to 67°19°)	62°17°	0%	2 mph3 km/h from WNW, gusts 3 mph5 km/h	72%	83%	3
Sun 12p	Partly sunny	65°18° (likely 64°18° to 70°21°)	65°18°	0%	2 mph3 km/h from WNW, gusts 4 mph7 km/h	67%	71%	4
Sun 1p	Partly sunny	67°19° (likely 65°18° to 72°22°)	67°19°	0%	2 mph3 km/h from WNW, gusts 6 mph10 km/h	63%	72%	4
Sun 2p	Cloudy	68°20° (likely 66°19° to 73°23°)	68°20°	0%	7 mph11 km/h from WNW, gusts 9 mph14 km/h	60%	82%	4
Sun 3p	Mostly sunny	70°21° (likely 66°19° to 73°23°)	70°21°	0%	7 mph11 km/h from WNW, gusts 12 mph19 km/h	60%	81%	3
Sun 4p	Mostly sunny	69°21° (likely 64°18° to 71°22°)	69°21°	0%	7 mph11 km/h from WNW, gusts 14 mph22 km/h	60%	78%	2
Sun 5p	Cloudy	68°20° (likely 62°17° to 68°20°)	68°20°	0%	8 mph13 km/h from WNW, gusts 13 mph20 km/h	64%	76%	1
Sun 6p	Partly cloudy	66°19° (likely 60°16° to 66°19°)	66°19°	0%	8 mph13 km/h from WNW, gusts 13 mph20 km/h	69%	82%	0
Sun 7p	Partly cloudy	63°17° (likely 57°14° to 63°17°)	63°17°	0%	8 mph13 km/h from WNW, gusts 10 mph16 km/h	76%	78%	0
Sun 8p	Cloudy	60°16° (likely 55°13° to 60°16°)	60°16°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	82%	79%	0
Sun 9p	Mostly clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	3 mph5 km/h from W, gusts 10 mph16 km/h	86%	80%	0
Sun 10p	Mostly clear	58°14° (likely 52°11° to 58°14°)	58°14°	0%	3 mph5 km/h from W, gusts 9 mph15 km/h	89%	18%	0
Sun 11p	Mostly clear	57°14° (likely 51°11° to 57°14°)	57°14°	0%	5 mph8 km/h from W, gusts 8 mph12 km/h	90%	33%	0
Mon 12a	Mostly clear	56°13° (likely 50°10° to 57°14°)	56°13°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	90%	40%	0
Mon 1a	Clear	56°13° (likely 50°10° to 56°13°)	56°13°	0%	5 mph8 km/h from W, gusts 7 mph12 km/h	90%	32%	0
Mon 2a	Partly cloudy	55°13° (likely 49°9° to 56°13°)	55°13°	0%	5 mph8 km/h from SW, gusts 7 mph11 km/h	89%	38%	0
Mon 3a	Partly cloudy	54°12° (likely 49°9° to 56°13°)	54°12°	0%	5 mph8 km/h from SW, gusts 7 mph11 km/h	90%	47%	0
Mon 4a	Partly cloudy	53°12° (likely 49°9° to 55°13°)	53°12°	0%	5 mph8 km/h from SW, gusts 7 mph11 km/h	92%	55%	0
Mon 5a	Partly cloudy	53°12° (likely 50°10° to 56°13°)	53°12°	0%	3 mph5 km/h from SSW, gusts 6 mph10 km/h	94%	45%	0
Mon 6a	Partly cloudy	52°11° (likely 45°7° to 58°14°)	52°11°	0%	3 mph5 km/h from SSW, gusts 5 mph8 km/h	95%	68%	0
Mon 7a	Cloudy	52°11° (likely 44°7° to 58°14°)	52°11°	0%	3 mph5 km/h from SSW, gusts 5 mph8 km/h	96%	77%	0
Mon 8a	Partly sunny	52°11° (likely 44°7° to 58°14°)	52°11°	0%	5 mph8 km/h from SSW, gusts 5 mph8 km/h	96%	65%	0
Mon 9a	Partly sunny	55°13° (likely 49°9° to 59°15°)	55°13°	0%	5 mph8 km/h from SSW, gusts 6 mph10 km/h	94%	64%	1

Days ahead

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

Today, Oct 24. Sunny. High 70°21°, low 50°10°. Typical 71°22° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 51°11°
  Dry
Official NWS forecast
Today: Sunny. High near 70, with temperatures falling to around 68 in the afternoon. Northwest wind 3 to 7 mph.
Tonight: Mostly clear, with a low around 50. North wind 1 to 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–73°23°
Low, likely
43°6°–51°11°
Typical high / low
71°22° / 52°11°
Wind
10 mph16 km/h, gusts 15 mph24 km/h
UV peak
5
Tomorrow, Oct 25. Partly sunny. High 70°21°, low 52°11°. Typical 71°22° / 52°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 53°12°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 70, with temperatures falling to around 68 in the afternoon. East northeast wind 1 to 8 mph.
Night: Partly cloudy, with a low around 52. West southwest wind 3 to 8 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–73°23°
Low, likely
44°7°–52°11°
Typical high / low
71°22° / 52°11°
Wind
12 mph19 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 66°19°, low 50°10°. Typical 70°21° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 66. West southwest wind 3 to 14 mph, with gusts as high as 21 mph.
Night: Partly cloudy, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
65°18°–67°19°
Low, likely
47°8°–55°13°
Typical high / low
70°21° / 52°11°
Wind
11 mph18 km/h, gusts 20 mph32 km/h
UV peak
5
Tuesday, Oct 27. Partly sunny. High 66°19°, low 50°10°. Typical 70°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 66.
Night: Partly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
45°7°–55°13°
Typical high / low
70°21° / 52°11°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
5
Wednesday, Oct 28. Mostly cloudy. High 66°19°, low 52°11°. Typical 70°21° / 52°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 66.
Night: Mostly cloudy, with a low around 52.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–70°21°
Low, likely
44°7°–54°12°
Typical high / low
70°21° / 52°11°
Wind
9 mph14 km/h
UV peak
4
Thursday, Oct 29. Rain. High 64°18°, low 51°11°. Typical 70°21° / 52°11°. Rain, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain after 5pm. Partly sunny, with a high near 64.
Night: A chance of rain. Partly cloudy, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
50°10°–56°13°
Typical high / low
70°21° / 52°11°
Wind
10 mph17 km/h, gusts 17 mph27 km/h
UV peak
4
Friday, Oct 30. Rain. High 63°17°, low 50°10°. Typical 69°21° / 51°11°. Rain 0.01 in0.3 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 63.
Night: A chance of rain. Mostly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
45°7°–53°12°
Typical high / low
69°21° / 51°11°
Wind
10 mph16 km/h, gusts 24 mph38 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 62°17°, low 47°8°. Typical 69°21° / 51°11°. Rain 0.03 in0.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  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
61°16°–66°19°
Low, likely
40°4°–52°11°
Typical high / low
69°21° / 51°11°
Wind
8 mph12 km/h, gusts 17 mph27 km/h
UV peak
4
Sunday, Nov 1. Sunny. High 66°19°, low 46°8°. Typical 69°21° / 51°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  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°–71°22°
Low, likely
39°4°–52°11°
Typical high / low
69°21° / 51°11°
Wind
7 mph12 km/h, gusts 18 mph29 km/h
UV peak
4
Monday, Nov 2. Rain. High 61°16°, low 50°10°. Typical 68°20° / 51°11°. Rain 0.2 in5.1 mm, 10% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  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
59°15°–64°18°
Low, likely
42°6°–56°13°
Typical high / low
68°20° / 51°11°
Wind
8 mph13 km/h, gusts 19 mph31 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 70°, low 50°.
Tomorrow
Dry, high 70°, low 52°.
Monday
Dry, high 66°, low 50°, cooling off.
Rest of week
Mostly dry, highs 61–66°.

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 Lorenzo Creek (Alameda) above Hayward

4.6 mi

Below flood stage

Level: 2.6 ft
Flow: under 1 cfs

Forecast peak 2.6 ft Sat 10 AM

Reading from Sat 9:05 AM · NWS gauge page

Alameda Creek near Niles

8.3 mi

Below flood stage

Level: 2.8 ft
Flow: 21 cfs

Forecast peak 2.8 ft Sat 10 AM

Reading from Sat 9 AM · NWS gauge page

Castro Valley Creek at Hayward

3.9 mi

Level: 0.7 ft
Flow: under 1 cfs

Reading from Sat 8:20 AM · NWS gauge page

Alameda Creek Flood Channel at Union City

4.2 mi

Level: 7.4 ft
Flow: 30 cfs

Reading from Sat 9 AM · NWS gauge page

For your home

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

Heating this week

About 55% less heating than a typical week.

This week 13Typical 28

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 48°F).

Open the windows?

Today, 11:00 AM–8:00 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°0° colder than normal (daily mean temperature).

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

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

Sun & moon

Sun

Daylight: 10 h 53 min; Losing 2 min 11 s a day; shortest Dec 21, 1 h 20 min less
Golden hour: 5:42–6:35 PM; Morning 7:09–8:01 AM
Blue hour: 6:35–6:45 PM; Morning 6:58–7:09 AM; first light 6:58 AM

Stars tonight? Fair

Mostly clear 6:45 PM–3 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:47 AM · rises 5:18 PM
Full moon: Oct 25
New moon: Nov 8

Looking southeast from Hayward. The highest point on the skyline is about 3,800 ft, 23 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