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Costa Mesa, CA

70°F
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Costa Mesa

California

70°
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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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6 AM

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

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

WindS 4 mph

Air QualityPoor

Wind Gusts4 mph

Humidity93%

Indoor Humidity93% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility2 mi

Cloud Ceiling30000 ft

7 AM

69°
RealFeel® 70°
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 Sunday
alerts

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™70°

WindS 4 mph

Air QualityPoor

Max UV Index0.8 (Low)

Wind Gusts4 mph

Humidity90%

Indoor Humidity90% (Humid)

Dew Point66° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover25%

Visibility1.00 mi

Cloud Ceiling30000 ft

8 AM

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

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™72°

WindW 4 mph

Air QualityPoor

Max UV Index0.7 (Low)

Wind Gusts4 mph

Humidity83%

Indoor Humidity83% (Humid)

Dew Point66° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover75%

Visibility0.50 mi

Cloud Ceiling500 ft

9 AM

74°
RealFeel® 76°
Pleasant
RealFeel Guide
Pleasant
63° to 81°
Most consider this temperature range ideal.
LEARN MORE
rain drop 0%
Chevron down
Fog
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™73°

WindWSW 5 mph

Air QualityPoor

Max UV Index1.2 (Low)

Wind Gusts6 mph

Humidity78%

Indoor Humidity78% (Humid)

Dew Point66° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover73%

Visibility0.50 mi

Cloud Ceiling500 ft

10 AM

76°
RealFeel® 83°
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
Fog
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™76°

WindWSW 6 mph

Air QualityPoor

Max UV Index4.6 (Moderate)

Wind Gusts7 mph

Humidity72%

Indoor Humidity72% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover50%

Visibility0.50 mi

Cloud Ceiling30000 ft

11 AM

78°
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
Fog
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™78°

WindSW 7 mph

Air QualityPoor

Max UV Index7.2 (High)

Wind Gusts9 mph

Humidity67%

Indoor Humidity67% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover50%

Visibility1.00 mi

Cloud Ceiling30000 ft

12 PM

80°
RealFeel® 89°
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
Fog
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™79°

Heat Index82°

WindSW 7 mph

Air QualityPoor

Max UV Index9.8 (Very High)

Wind Gusts10 mph

Humidity64%

Indoor Humidity64% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover50%

Visibility2 mi

Cloud Ceiling30000 ft

1 PM

81°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Fog
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™81°

Heat Index83°

WindSW 8 mph

Air QualityPoor

Max UV Index10.9 (Extreme)

Wind Gusts13 mph

Humidity62%

Indoor Humidity62% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™8 (Bright)

Cloud Cover50%

Visibility4 mi

Cloud Ceiling30000 ft

2 PM

81°
RealFeel® 91°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™81°

Heat Index84°

WindSW 8 mph

Air QualityPoor

Max UV Index9.8 (Very High)

Wind Gusts15 mph

Humidity61%

Indoor Humidity61% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

3 PM

83°
RealFeel® 90°
Hot
RealFeel Guide
Hot
90° to 100°
Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities.
LEARN MORE
rain drop 0%
Chevron down
Mostly sunny
alerts

Extreme Heat Warning

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

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™83°

Heat Index85°

WindSW 8 mph

Air QualityPoor

Max UV Index7.2 (High)

Wind Gusts15 mph

Humidity58%

Indoor Humidity58% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover22%

Visibility10 mi

Cloud Ceiling30000 ft

4 PM

82°
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 Sunday
alerts

Heat Advisory

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

High Surf Advisory

5:00 PM Wednesday - 5:00 PM Saturday

RealFeel Shade™81°

Heat Index84°

WindSW 8 mph

Air QualityPoor

Max UV Index4.6 (Moderate)

Wind Gusts15 mph

Humidity60%

Indoor Humidity60% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover15%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

81°
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 Sunday
alerts

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

RealFeel Shade™81°

Heat Index83°

WindSSW 8 mph

Air QualityPoor

Max UV Index3.1 (Moderate)

Wind Gusts15 mph

Humidity61%

Indoor Humidity61% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

80°
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 Sunday
alerts

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

RealFeel Shade™80°

Heat Index82°

WindSSW 8 mph

Air QualityFair

Max UV Index1.8 (Low)

Wind Gusts13 mph

Humidity63%

Indoor Humidity63% (Humid)

Dew Point66° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover11%

Visibility10 mi

Cloud Ceiling30000 ft

7 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 Sunday
alerts

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

RealFeel Shade™80°

WindSSW 7 mph

Air QualityFair

Max UV Index0.8 (Low)

Wind Gusts10 mph

Humidity66%

Indoor Humidity66% (Humid)

Dew Point66° F

AccuLumen Brightness Index™5 (Medium)

Cloud Cover18%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

76°
RealFeel® 77°
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 Sunday
alerts

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

WindSSW 6 mph

Air QualityFair

Wind Gusts8 mph

Humidity73%

Indoor Humidity73% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover25%

Visibility10 mi

Cloud Ceiling30000 ft

9 PM

75°
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

Extreme Heat Warning

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

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

WindSSW 6 mph

Air QualityFair

Wind Gusts7 mph

Humidity76%

Indoor Humidity76% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover28%

Visibility10 mi

Cloud Ceiling30000 ft

10 PM

73°
RealFeel® 74°
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 Sunday
alerts

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

WindSSW 6 mph

Air QualityFair

Wind Gusts7 mph

Humidity80%

Indoor Humidity80% (Very Humid)

Dew Point67° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover28%

Visibility10 mi

Cloud Ceiling30000 ft

11 PM

73°
RealFeel® 74°
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 Sunday
alerts

Heat Advisory

10:00 AM Friday - 8:00 PM Sunday

WindSSW 5 mph

Air QualityFair

Wind Gusts6 mph

Humidity81%

Indoor Humidity81% (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 69° with a RealFeel® of 70°, mostly clear 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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