❮
Today Hourly 7 days 30 days Air Quality
❯
Hourly Weather | Today › Wednesday, March 18, 2026
Active Weather Warnings
Santa Barbara, California
10 AM
Cloudy Weather
72°
Feels Like 75°
0
Humidity: 59%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
75°
Feels Like 81°
0
Humidity: 55%
UV Index: 4
Wind: 6 mph
12 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 48%
UV Index: 5
Wind: 6 mph
1 PM
Cloudy Weather
81°
Feels Like 88°
0
Humidity: 44%
UV Index: 6
Wind: 6 mph
2 PM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 41%
UV Index: 5
Wind: 7 mph
3 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 43%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
81°
Feels Like 82°
0
Humidity: 43%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 46%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
77°
Feels Like 75°
0
Humidity: 51%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 60%
UV Index: 0
Wind: 6 mph
8 PM
Night
70°
Feels Like 68°
0
Humidity: 68%
UV Index: 0
Wind: 6 mph
9 PM
Night
66°
Feels Like 64°
0
Humidity: 74%
UV Index: 0
Wind: 6 mph
10 PM
Night
64°
Feels Like 64°
0
Humidity: 79%
UV Index: 0
Wind: 5 mph
11 PM
Night
64°
Feels Like 64°
0
Humidity: 78%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

10 AM
64 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.52 µg/m³
  • PM10: 29.81 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 AM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.97 µg/m³
  • PM10: 30.15 µg/m³
  • O3: 0.037 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

12 PM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.34 µg/m³
  • PM10: 30.69 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

1 PM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.64 µg/m³
  • PM10: 31.19 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.84 µg/m³
  • PM10: 31.48 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.75 µg/m³
  • PM10: 31.39 µg/m³
  • O3: 0.045 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.55 µg/m³
  • PM10: 31.18 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.5 µg/m³
  • PM10: 31.2 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.09 µg/m³
  • PM10: 31.84 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.09 µg/m³
  • PM10: 32.84 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.28 µg/m³
  • PM10: 34.06 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.77 µg/m³
  • PM10: 35.32 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
78 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 25.06 µg/m³
  • PM10: 36.25 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
80 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 26.04 µg/m³
  • PM10: 36.66 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Santa Barbara

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued March 15 at 12:07AM PDT until March 20 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Mar 16, 8:00 PM → Mar 20, 8:00 PM
WHAT: For the Heat Advisory, temperatures of 82 to 98 expected..
For the Extreme Heat Watch, dangerously hot conditions with
temperatures of 90 to 104 are possible.

WHERE: A portion of southwest California.

WHEN: For the Heat Advisory, from 10 AM to 8 PM PDT Monday. For
the Extreme Heat Watch, from Monday evening through Friday evening.

IMPACTS: There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors. There is a high risk
for heat illness for sensitive populations including the very
young, the very old, those without air conditioning, and those
active outdoors.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Mar 15, 11:38 AM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory issued March 18 at 1:48AM PDT until March 20 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Mar 18, 1:48 AM → Mar 20, 8:00 PM
WHAT: Hot conditions with high temperatures in the 80s and 90s
expected.

WHERE: San Luis Obispo County Beaches, San Luis Obispo County
Inland Central Coast, Santa Barbara County Central Coast Beaches,
Santa Barbara County Inland Central Coast, Santa Barbara County
Southeastern Coast, Santa Barbara County Southwestern Coast, and
Santa Ynez Valley.

WHEN: Until 8 PM PDT Friday.

IMPACTS: There is a high risk for heat illness for sensitive
populations including the very young, the very old, those without
air conditioning, and those active outdoors.

ADDITIONAL DETAILS: Warm overnight low temperatures will
contribute to the heat risk, especially in the mountain and
foothill locations.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Mar 18, 7:32 AM Source: NWS Alert

Explore U.S. Weather Trends

❄️ Coldest Cities in the U.S. – Live Temperature Rankings 🔥 Hottest Cities Today – Real-Time Heat Observations ⚠️ Active Weather Alerts – Warnings, Watches & Advisories 🌪️ Windiest Cities – Highest Sustained Wind Speeds 🌫️ Worst Air Quality – Cities with the Highest AQI 🍃 Best Air Quality – Cities with the Lowest AQI