Hourly Weather | Today Sunday, August 9, 2026
Active Weather Warnings
San Francisco, California
5 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 75%
UV Index: 3
Wind: 14 mph
6 PM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 76%
UV Index: 2
Wind: 14 mph
7 PM
Cloudy Weather
64°
Feels Like 61°
0
Humidity: 78%
UV Index: 1
Wind: 14 mph
8 PM
Cloudy Weather
63°
Feels Like 57°
0
Humidity: 80%
UV Index: 0
Wind: 14 mph
9 PM
Cloudy Night
61°
Feels Like 55°
0
Humidity: 86%
UV Index: 0
Wind: 13 mph
10 PM
Cloudy Night
59°
Feels Like 55°
0
Humidity: 88%
UV Index: 0
Wind: 12 mph
11 PM
Cloudy Night
61°
Feels Like 55°
0
Humidity: 87%
UV Index: 0
Wind: 10 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.88 µg/m³
  • PM10: 23.44 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.96 µg/m³
  • PM10: 24.2 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.95 µg/m³
  • PM10: 24.65 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.94 µg/m³
  • PM10: 25.04 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.84 µg/m³
  • PM10: 25.09 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.66 µg/m³
  • PM10: 24.94 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.4 µg/m³
  • PM10: 24.62 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.06 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Weather Alerts and Warnings for San Francisco

Minor Expected Likely

Coastal Flood Advisory

Coastal Flood Advisory issued August 9 at 10:28AM PDT until August 13 at 2:00AM PDT by NWS San Francisco CA
Aug 9, 10:28 AM Aug 13, 2:00 AM
WHAT: Up to 1.6 ft of inundation above ground level is
possible in low-lying areas near shorelines and tidal
waterways.

WHERE: Bayshore locations along the San Francisco Bay, San
Pablo Bay, and Monterey Bay.

WHEN: Until 2 AM PDT Thursday.

IMPACTS: Flooding of lots, parks, and roads with only
isolated road closures expected.

ADDITIONAL DETAILS: At the San Francisco tidal gauge, high
tide is expected to be 1.5 ft above normal (7.34 ft MLLW) at
9:02 PM Sunday 8/9, 1.5 ft above normal (7.36 ft MLLW) at
10:01 PM Monday 8/10, 1.6 ft above normal (7.44 ft MLLW) at
10:57 PM Tuesday 8/11, and 1.3 ft above normal (7.14 ft MLLW)
at 11:49 PM Wednesday 8/12. These predictions include both
astronomical tides and roughly 3-6 inches of additional water
mainly from a combination of thermal expansion and accumulated
sea level rise since the tidal datum was established (1983-
2001). High tide varies up to 90 minutes earlier or later
along the Pacific Coast and through the San Francisco Bay,
respectively.
+ Read More
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.
Updated: Aug 9, 4:27 PM Source: NWS Alert