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Costa Mesa, CA

87°F
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Costa Mesa

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Costa Mesa, CA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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3 PM

84°
RealFeel® 87°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

10:00 AM Friday - 8:00 PM Thursday
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

RealFeel Shade™83°

Heat Index86°

WindW 9 mph

Air QualityFair

Max UV Index3.8 (Moderate)

Wind Gusts15 mph

Humidity56%

Indoor Humidity56% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

83°
RealFeel® 85°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

10:00 AM Friday - 8:00 PM Thursday
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

RealFeel Shade™82°

Heat Index85°

WindW 9 mph

Air QualityFair

Max UV Index2.6 (Moderate)

Wind Gusts14 mph

Humidity57%

Indoor Humidity57% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

81°
RealFeel® 82°
Very Warm
RealFeel Guide
Very Warm
82° to 89°
Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

10:00 AM Friday - 8:00 PM Thursday
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

RealFeel Shade™80°

Heat Index83°

WindW 9 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts14 mph

Humidity61%

Indoor Humidity61% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover10%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

79°
RealFeel® 80°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

10:00 AM Friday - 8:00 PM Thursday
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

RealFeel Shade™80°

Heat Index80°

WindW 8 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts12 mph

Humidity66%

Indoor Humidity66% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

77°
RealFeel® 78°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Extreme Heat Warning

10:00 AM Friday - 8:00 PM Thursday
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

WindWSW 6 mph

Air QualityFair

Wind Gusts10 mph

Humidity74%

Indoor Humidity74% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover15%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

74°
RealFeel® 75°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

WindWSW 6 mph

Air QualityFair

Wind Gusts8 mph

Humidity81%

Indoor Humidity81% (Very Humid)

Dew Point68° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

71°
RealFeel® 72°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

WindWSW 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity88%

Indoor Humidity88% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

69°
RealFeel® 70°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

WindSW 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity93%

Indoor Humidity93% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

69°
RealFeel® 70°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Mostly clear
alerts

Coastal Flood Advisory

6:00 AM Wednesday - 2:00 PM Tuesday
alerts

Beach Hazards Statement

4:00 PM Tuesday - 11:00 PM Friday

WindSW 5 mph

Air QualityPoor

Wind Gusts5 mph

Humidity93%

Indoor Humidity93% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

Hourly Weather Forecast for Costa Mesa

AccuWeather's hourly forecast for Costa Mesa provides hour-by-hour temperatures, RealFeel® Temperature, and precipitation probability through the next 10 days. The current hour shows 84° with a RealFeel® of 87°, mostly sunny with a 0% chance of precipitation. Each hourly forecast includes wind speed, humidity, air quality, UV index, and the AccuLumen Brightness Index™, AccuWeather's measure of perceived outdoor light intensity. Forecasts are generated by proprietary systems developed by AccuWeather meteorologists since 1962.

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