Coastal Flood Advisory
Starts in 1 h 13 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, 1.5 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 6:35 AM PDT at KAPC

Napa, CA weather

Clear and 57°14°.

Mostly agree

Now 57°14°

Clear

Wind: 9 mph15 km/h; From the west. Up to 9 mph15 km/h through 6 PM
Dew point: 37°3°; Comfortable · up to 46°8° by 12 PM
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 19Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.04 inHg1017 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 (54°12° then, 53°12° now)

Good hours for

Above 60°16° today by 11 AM
High 72°22° today at 3 PM
Below 60°16° tonight after 8 PM
Low 46°8° tonight at 4 AM
Fog tomorrow night from 2 AM

This morningUp to 62°17° by 11 AM · Clear
This afternoonUp to 72°22° by 3 PM · Clear
TonightDown to 46°8° by 4 AM · Clear
Tomorrow morningUp to 61°16° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 70°21° by 3 PM · Mostly cloudy
Tomorrow nightDown to 44°7° by 5 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 6a	Clear	48°9° (likely 48°9° to 54°12°)	47°8°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	54%	0%	0
Sat 7a	Sunny	48°9° (likely 48°9° to 54°12°)	47°8°	0%	3 mph5 km/h from NNW, gusts 5 mph8 km/h	57%	0%	0
Sat 8a	Sunny	48°9° (likely 48°9° to 54°12°)	47°8°	0%	3 mph5 km/h from WNW, gusts 5 mph8 km/h	60%	0%	0
Sat 9a	Sunny	53°12° (likely 52°11° to 58°14°)	53°12°	0%	3 mph5 km/h from N, gusts 5 mph8 km/h	61%	0%	0
Sat 10a	Sunny	58°14° (likely 58°14° to 63°17°)	58°14°	0%	5 mph8 km/h from S, gusts 4 mph6 km/h	58%	0%	1
Sat 11a	Sunny	62°17° (likely 62°17° to 68°20°)	63°17°	0%	6 mph10 km/h from S, gusts 5 mph8 km/h	52%	0%	3
Sat 12p	Sunny	67°19° (likely 66°19° to 71°22°)	67°19°	0%	5 mph8 km/h from S, gusts 7 mph12 km/h	46%	0%	4
Sat 1p	Sunny	70°21° (likely 68°20° to 73°23°)	70°21°	0%	5 mph8 km/h from S, gusts 7 mph11 km/h	42%	0%	4
Sat 2p	Sunny	71°22° (likely 70°21° to 73°23°)	71°22°	0%	5 mph8 km/h from SSW, gusts 9 mph14 km/h	42%	0%	4
Sat 3p	Sunny	72°22° (likely 71°22° to 74°23°)	72°22°	0%	5 mph8 km/h from SSW, gusts 8 mph12 km/h	42%	0%	3
Sat 4p	Sunny	72°22° (likely 71°22° to 73°23°)	72°22°	0%	5 mph8 km/h from SSW, gusts 9 mph14 km/h	42%	0%	2
Sat 5p	Sunny	71°22° (likely 67°19° to 71°22°)	71°22°	0%	3 mph5 km/h from SSW, gusts 11 mph18 km/h	42%	0%	2
Sat 6p	Clear	68°20° (likely 63°17° to 68°20°)	68°20°	0%	0 mph0 km/h, gusts 11 mph17 km/h	49%	0%	1
Sat 7p	Clear	62°17° (likely 59°15° to 63°17°)	62°17°	0%	0 mph0 km/h, gusts 8 mph12 km/h	59%	0%	0
Sat 8p	Clear	59°15° (likely 56°13° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	65%	0%	0
Sat 9p	Clear	57°14° (likely 54°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	68%	0%	0
Sat 10p	Clear	55°13° (likely 52°11° to 56°13°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	71%	1%	0
Sat 11p	Clear	54°12° (likely 50°10° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	75%	0%	0
Sun 12a	Clear	52°11° (likely 49°9° to 53°12°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	75%	0%	0
Sun 1a	Clear	51°11° (likely 49°9° to 53°12°)	51°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	76%	0%	0
Sun 2a	Clear	50°10° (likely 48°9° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	80%	36%	0
Sun 3a	Mostly clear	48°9° (likely 47°8° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 4 mph7 km/h	82%	45%	0
Sun 4a	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	0 mph0 km/h, gusts 3 mph5 km/h	85%	16%	0
Sun 5a	Partly cloudy	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 3 mph4 km/h	86%	38%	0
Sun 6a	Partly cloudy	45°7° (likely 45°7° to 50°10°)	45°7°	0%	0 mph0 km/h, gusts 3 mph5 km/h	85%	34%	0
Sun 7a	Partly sunny	45°7° (likely 45°7° to 50°10°)	45°7°	0%	0 mph0 km/h, gusts 2 mph4 km/h	86%	35%	0
Sun 8a	Partly sunny	45°7° (likely 44°7° to 51°11°)	45°7°	0%	1 mph2 km/h from NE, gusts 3 mph4 km/h	87%	70%	0
Sun 9a	Partly sunny	50°10° (likely 48°9° to 55°13°)	50°10°	0%	1 mph2 km/h from NE, gusts 2 mph4 km/h	82%	68%	1
Sun 10a	Partly sunny	57°14° (likely 53°12° to 60°16°)	57°14°	0%	1 mph2 km/h from NE, gusts 2 mph3 km/h	74%	57%	2
Sun 11a	Cloudy	61°16° (likely 58°14° to 63°17°)	61°16°	0%	3 mph5 km/h from SE, gusts 4 mph6 km/h	64%	61%	3
Sun 12p	Partly sunny	65°18° (likely 62°17° to 66°19°)	65°18°	0%	3 mph5 km/h from SE, gusts 5 mph8 km/h	59%	74%	4
Sun 1p	Partly sunny	68°20° (likely 65°18° to 69°21°)	68°20°	0%	3 mph5 km/h from SE, gusts 7 mph12 km/h	55%	77%	4
Sun 2p	Partly sunny	69°21° (likely 66°19° to 70°21°)	69°21°	0%	5 mph8 km/h from SSW, gusts 8 mph13 km/h	53%	80%	4
Sun 3p	Cloudy	70°21° (likely 66°19° to 71°22°)	71°22°	0%	5 mph8 km/h from SSW, gusts 8 mph13 km/h	52%	83%	3
Sun 4p	Cloudy	70°21° (likely 65°18° to 70°21°)	70°21°	0%	5 mph8 km/h from SSW, gusts 9 mph15 km/h	52%	90%	3
Sun 5p	Cloudy	69°21° (likely 62°17° to 69°21°)	69°21°	0%	2 mph3 km/h from SW, gusts 9 mph15 km/h	52%	92%	1
Sun 6p	Cloudy	67°19° (likely 59°15° to 67°19°)	67°19°	0%	2 mph3 km/h from SW, gusts 10 mph15 km/h	58%	94%	0
Sun 7p	Partly cloudy	63°17° (likely 55°13° to 63°17°)	63°17°	0%	2 mph3 km/h from SW, gusts 10 mph17 km/h	65%	62%	0
Sun 8p	Partly cloudy	59°15° (likely 53°12° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 10 mph16 km/h	72%	48%	0
Sun 9p	Partly cloudy	56°13° (likely 52°11° to 57°14°)	56°13°	0%	0 mph0 km/h, gusts 8 mph12 km/h	77%	41%	0
Sun 10p	Clear	54°12° (likely 50°10° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 7 mph11 km/h	81%	14%	0
Sun 11p	Clear	53°12° (likely 49°9° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	85%	16%	0
Mon 12a	Mostly clear	51°11° (likely 46°8° to 52°11°)	51°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	18%	0
Mon 1a	Mostly clear	50°10° (likely 45°7° to 51°11°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	93%	36%	0
Mon 2a	Fog	48°9° (likely 45°7° to 51°11°)	48°9°	0%	0 mph0 km/h, gusts 5 mph8 km/h	95%	50%	0
Mon 3a	Fog	47°8° (likely 45°7° to 51°11°)	47°8°	0%	0 mph0 km/h, gusts 5 mph9 km/h	98%	64%	0
Mon 4a	Fog	45°7° (likely 45°7° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	99%	66%	0
Mon 5a	Fog	44°7° (likely 44°7° to 51°11°)	45°7°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	100%	62%	0

Days ahead

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

Today, Oct 24. Sunny. High 72°22°, low 44°7°. Typical 76°24° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 46°8°
  Dry
Official NWS forecast
Today: Sunny, with a high near 72. Southwest wind around 6 mph.
Tonight: Mostly clear. Low around 44, with temperatures rising to around 46 overnight. Wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–74°23°
Low, likely
44°7°–52°11°
Typical high / low
76°24° / 48°9°
Wind
8 mph12 km/h, gusts 17 mph28 km/h
UV peak
5
Tomorrow, Oct 25. Partly sunny. High 71°22°, low 43°6°. Typical 75°24° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 44°7°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 71, with temperatures falling to around 69 in the afternoon. South southeast wind 0 to 5 mph.
Night: Areas of fog after 2am. Partly cloudy, with a low around 43. West wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–71°22°
Low, likely
43°6°–50°10°
Typical high / low
75°24° / 48°9°
Wind
8 mph13 km/h, gusts 17 mph27 km/h
UV peak
4
Monday, Oct 26. Fog. High 68°20°, low 41°5°. Typical 75°24° / 48°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  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.
Official NWS forecast
Day: Areas of fog before 10am. Mostly sunny, with a high near 68. West wind 1 to 9 mph.
Night: Areas of fog after midnight. Mostly clear, with a low around 41.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–69°21°
Low, likely
41°5°–49°9°
Typical high / low
75°24° / 48°9°
Wind
11 mph18 km/h, gusts 22 mph35 km/h
UV peak
4
Tuesday, Oct 27. Fog. High 67°19°, low 43°6°. Typical 74°23° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am. Mostly sunny, with a high near 67.
Night: Areas of fog after 4am. Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
42°6°–46°8°
Typical high / low
74°23° / 47°8°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 65°18°, low 44°7°. Typical 74°23° / 47°8°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 9am. Mostly sunny, with a high near 65.
Night: Areas of fog after 3am. Mostly cloudy, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
65°18°–67°19°
Low, likely
44°7°–48°9°
Typical high / low
74°23° / 47°8°
Wind
9 mph15 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 63°17°, low 44°7°. Typical 74°23° / 47°8°. Rain, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 44°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am, then a slight chance of rain. Partly sunny, with a high near 63.
Night: A slight chance of rain before 1am, then areas of fog and a chance of rain. Partly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–65°18°
Low, likely
44°7°–52°11°
Typical high / low
74°23° / 47°8°
Wind
10 mph16 km/h, gusts 26 mph42 km/h
UV peak
4
Friday, Oct 30. Rain. High 62°17°, low 43°6°. Typical 73°23° / 47°8°. Rain 0.01 in0.3 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog and a chance of rain before 8am, then a chance of rain and patchy fog. Partly sunny, with a high near 62.
Night: A chance of rain before 11pm, then a chance of rain and patchy fog between 11pm and 1am, then areas of fog and a chance of rain. Mostly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
41°5°–45°7°
Typical high / low
73°23° / 47°8°
Wind
10 mph16 km/h, gusts 22 mph36 km/h
UV peak
4
Saturday, Oct 31. Sunny. High 65°18°, low 42°6°. Typical 73°23° / 47°8°. Rain 0.02 in0.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 44°7°
  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°–72°22°
Low, likely
35°2°–46°8°
Typical high / low
73°23° / 47°8°
Wind
9 mph15 km/h, gusts 22 mph35 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 68°20°, low 43°6°. Typical 72°22° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  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
62°17°–76°24°
Low, likely
42°6°–46°8°
Typical high / low
72°22° / 46°8°
Wind
5 mph8 km/h, gusts 19 mph31 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 67°19°, low 48°9°. Typical 72°22° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°20°
  Dry
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
59°15°–77°25°
Low, likely
40°4°–56°13°
Typical high / low
72°22° / 46°8°
Wind
10 mph15 km/h, gusts 23 mph37 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 44°.
Tomorrow
Dry, high 71°, low 43°.
Monday
Dry, high 68°, low 41°, cooling off.
Rest of week
Mostly dry, highs 62–68°.

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

For your home

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

Heating this week

About 38% less heating than a typical week.

This week 18Typical 29

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 8
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 37°F).

Open the windows?

Today, 11:00 AM–7:00 PM

Good stretch to open the windows.

Is this typical?

NAPA STATE HOSPITAL · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 4°2° colder than typical.

Last 7 days vs normal

On average 1°0° warmer than normal (daily mean temperature).

+3°+2°SunOct 18
—MonOct 19
−3°−2°TueOct 20
+1°±0°WedOct 21
+1°±0°ThuOct 22
+3°+2°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 52 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 22 min less
Golden hour: 5:42–6:35 PM; Morning 7:10–8:03 AM
Blue hour: 6:35–6:45 PM; Morning 7:00–7:10 AM; first light 7:00 AM

Stars tonight? Good

Clear 6:47–7 AM; moon 97% lit but below the horizon.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:48 AM · rises 5:18 PM
Full moon: Oct 25
New moon: Nov 8

Looking northeast from Napa. The highest point on the skyline is about 2,600 ft, 13 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