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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Friday, November 21, 2025
Active Weather Warnings
San Francisco, California
9 AM
Cloudy Weather
50°
Feels Like 54°
0
Humidity: 84%
Wind: 5 mph
UV Index: 2
10 AM
Cloudy Weather
54°
Feels Like 57°
0
Humidity: 74%
Wind: 5 mph
UV Index: 2
11 AM
Cloudy Weather
57°
Feels Like 61°
0
Humidity: 65%
Wind: 5 mph
UV Index: 3
12 PM
Cloudy Weather
59°
Feels Like 63°
0
Humidity: 60%
Wind: 6 mph
UV Index: 3
1 PM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 58%
Wind: 6 mph
UV Index: 3
2 PM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 57%
Wind: 6 mph
UV Index: 2
3 PM
Cloudy Weather
61°
Feels Like 64°
0
Humidity: 57%
Wind: 5 mph
UV Index: 2
4 PM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 60%
Wind: 5 mph
UV Index: 1
5 PM
Night
57°
Feels Like 57°
0
Humidity: 67%
Wind: 5 mph
UV Index: 0
6 PM
Night
55°
Feels Like 54°
0
Humidity: 74%
Wind: 5 mph
UV Index: 0
7 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 80%
Wind: 5 mph
UV Index: 0
8 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 82%
Wind: 5 mph
UV Index: 0
9 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 85%
Wind: 5 mph
UV Index: 0
10 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 86%
Wind: 5 mph
UV Index: 0
11 PM
Cloudy Night
52°
Feels Like 52°
0
Humidity: 87%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

9 AM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.61 µg/m³
  • PM10: 4.2 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.78 µg/m³
  • PM10: 4.64 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

11 AM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.07 µg/m³
  • PM10: 5.5 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

12 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.52 µg/m³
  • PM10: 6.52 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.86 µg/m³
  • PM10: 7.01 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.07 µg/m³
  • PM10: 7.2 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.21 µg/m³
  • PM10: 7.3 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.28 µg/m³
  • PM10: 7.21 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.31 µg/m³
  • PM10: 7.04 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.4 µg/m³
  • PM10: 7.15 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.56 µg/m³
  • PM10: 7.5 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.75 µg/m³
  • PM10: 7.96 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.97 µg/m³
  • PM10: 8.45 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.19 µg/m³
  • PM10: 9.01 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.37 µg/m³
  • PM10: 9.57 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for San Francisco

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued November 20 at 2:33PM PST until November 24 at 10:00PM PST by NWS San Francisco CA
Nov 20, 4:00 PM → Nov 24, 10:00 PM
WHAT: A long period northwesterly swell will result in an
increased risk for sneaker waves and rip currents. Breaking
waves of 13 to 18 feet are expected.

WHERE: Pacific Coast beaches.

WHEN: Through Monday evening.

IMPACTS: Sneaker waves can unexpectedly run significantly
farther up the beach than normal, including over rocks and
jetties. Rip currents are typically more frequent and stronger
in the vicinity of jetties, inlets, and piers.
+ Read More
Remain out of the water to avoid hazardous swimming conditions. Stay off rocks and never turn your back on the ocean!
Updated: Nov 21, 7:31 AM Source: NWS Alert