Coastal Flood Advisory — San Francisco, CA, North Bay Interior Valleys, CA, San Francisco Bay Shoreline, CA, Northern Monterey Bay, CA, Southern Monterey Bay and Big Sur Coast, CA 4:00 AM

San Francisco, California

Last updated: 2:25 AM CDT  ·  Refresh
14°C
Feels like 12°
Mostly Cloudy
▲ 22°  /  ▼ 14°
Wind
9 mph WSW
Humidity
93%
Dew Point
13°
Pressure
29.84 inHg
Visibility
5 mi
UV Index
0.0
Cloud Cover
65%
Sunrise
6:18 AM
Sunset
8:10 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Francisco is currently mostly cloudy at 14°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:18AM · Sunset: 8:10PM.

Alerts

Coastal Flood Advisory
San Francisco, CA, North Bay Interior Valleys, CA, San Francisco Bay Shoreline, CA, Northern Monterey Bay, CA, Southern Monterey Bay and Big Sur Coast, CA
Expires 4:00 AM
57 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
14°
19%
1 AM
14°
24%
2 AM
14°
7%
3 AM
14°
9%
4 AM
14°
11%
5 AM
13°
13%
6 AM
14°
15%
7 AM
14°
6%
8 AM
14°
6%
9 AM
16°
6%
10 AM
16°
6%
11 AM
17°
6%
12 PM
17°
7%
1 PM
21°
7%
2 PM
21°
7%
3 PM
21°
7%
4 PM
21°
3%
5 PM
20°
3%
6 PM
19°
6%
7 PM
18°
6%
8 PM
17°
6%
9 PM
16°
6%
10 PM
16°
16%
11 PM
16°
16%
7-Day Forecast
Today
22° 14°
Fog.
Sun
24° 14°
Fog.
Mon
23° 13°
Overcast.
Tue
24° 14°
Fog.
Wed
26° 15°
Clear.
Thu
24° 16°
Clear with a 22% chance of rain.
Fri
24° 16°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 14° Mostly Cloudy 19% 9 mph WSW 93%
1 AM 14° Fog 24% 9 mph WSW 93%
2 AM 14° Fog 7% 8 mph WSW 93%
3 AM 14° Fog 9% 8 mph SW 93%
4 AM 14° Fog 11% 8 mph SW 94%
5 AM 13° Fog 13% 8 mph SW 93%
6 AM 14° Fog 15% 8 mph SW 92%
7 AM 14° Fog 6% 8 mph SW 91%
8 AM 14° Fog 6% 8 mph SW 89%
9 AM 16° Mostly Cloudy 6% 8 mph WSW 86%
10 AM 16° Mostly Cloudy 6% 8 mph WSW 83%
11 AM 17° Partly Cloudy 6% 8 mph WSW 80%
12 PM 17° Partly Cloudy 7% 9 mph WSW 77%
1 PM 21° Partly Cloudy 7% 10 mph WSW 75%
2 PM 21° Mostly Clear 7% 11 mph WSW 73%
3 PM 21° Mostly Clear 7% 12 mph WSW 73%
4 PM 21° Mostly Clear 3% 12 mph WSW 73%
5 PM 20° Mostly Clear 3% 12 mph WSW 75%
6 PM 19° Mostly Clear 6% 12 mph WSW 78%
7 PM 18° Partly Cloudy 6% 11 mph WSW 81%
8 PM 17° Haze 6% 11 mph WSW 83%
9 PM 16° Haze 6% 10 mph WSW 84%
10 PM 16° Fog 16% 10 mph WSW 85%
11 PM 16° Fog 16% 9 mph WSW 85%
15-Day Forecast
Today
8/8
Fog
19%
14°
22°
Sun
8/9
Fog
18%
14°
24°
Mon
8/10
Overcast
16%
13°
23°
Tue
8/11
Fog
13%
14°
24°
Wed
8/12
Clear
3%
15°
26°
Thu
8/13
Clear
22%
16°
24°
Fri
8/14
Clear
16%
16°
24°
Sat
8/15
Clear
18%
16°
24°
Sun
8/16
Clear
3%
15°
24°
Mon
8/17
Clear
12%
14°
24°
Tue
8/18
Clear
3%
14°
26°
Wed
8/19
Clear
3%
14°
26°
Thu
8/20
Drizzle
60%
14°
27°
Fri
8/21
Clear
25%
15°
28°
Sat
8/22
Clear
3%
14°
28°
57
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
57 AQI 12.1 µg/m³
O3
Ground-level ozone
27 AQI 30 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 57 Moderate 27 57
Sun 43 Good 23 43
Mon 52 Moderate 19 52
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sat Aug 8, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE71 J/kg
MUCAPE0 J/kg
SBCIN-14575 J/kg
MLCIN0 J/kg
Lifted Index13.7
Kinematics
0–6 km Shear8 kt
0–1 km Shear12 kt
Eff. Shear—
0–1 km SRH52
0–3 km SRH16
Eff. SRH—
Storm Motion12° @ 12 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index9.4
Thermo & Levels
PWAT0.98 in
0–3 km LR-1.1 °C/km
700–500 LR8.2 °C/km
Total Totals34.7
LCL997 hPa
LFC—
EL—
Freezing Lvl16,572 ft