For Business
|
Warnings
Data Suite
Forensics
Advertising
Superior Accuracy™

Hawaii on alert for rare tropical threat. Click for the forecast.

Tropical Storm Cristobal forms in the Atlantic. Click to see where it is heading.

Costa Mesa, CA

Location

Location News Videos

Use Current Location

Recent

Costa Mesa

California

No results found.

Try searching for a city, zip code or point of interest.

Create Your Account Unlock extended daily and hourly forecasts — all with your free account.

Have an account already? Log In

settings

Costa Mesa, CA Weather

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

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

Hourly

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

View hourly forecasts 10-days ahead

Activate Your Premium+ Subscription

3 PM

78°

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.

0%

Mostly sunny

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

RealFeel Shade™76°

WindWSW 9 mph

Air QualityFair

Max UV Index6.7 (High)

Wind Gusts17 mph

Humidity64%

Indoor Humidity64% (Humid)

Dew Point65° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover22%

Visibility10 mi

Cloud Ceiling33300 ft

4 PM

77°

RealFeel® 81°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly sunny

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

RealFeel Shade™76°

WindWSW 9 mph

Air QualityFair

Max UV Index4.4 (Moderate)

Wind Gusts18 mph

Humidity66%

Indoor Humidity66% (Humid)

Dew Point65° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

5 PM

77°

RealFeel® 79°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly sunny

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

RealFeel Shade™76°

WindWSW 9 mph

Air QualityFair

Max UV Index2.9 (Moderate)

Wind Gusts18 mph

Humidity66%

Indoor Humidity66% (Humid)

Dew Point65° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

6 PM

76°

RealFeel® 76°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly sunny

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

RealFeel Shade™74°

WindWSW 9 mph

Air QualityFair

Max UV Index1.7 (Low)

Wind Gusts17 mph

Humidity69%

Indoor Humidity69% (Humid)

Dew Point65° F

AccuLumen Brightness Index™9 (Very Bright)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

7 PM

74°

RealFeel® 74°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Mostly sunny

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

RealFeel Shade™74°

WindWSW 8 mph

Air QualityFair

Max UV Index0.7 (Low)

Wind Gusts15 mph

Humidity72%

Indoor Humidity72% (Humid)

Dew Point64° F

AccuLumen Brightness Index™4 (Dull)

Cloud Cover26%

Visibility10 mi

Cloud Ceiling30000 ft

8 PM

73°

RealFeel® 72°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Cloudy

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

WindWSW 7 mph

Air QualityFair

Wind Gusts13 mph

Humidity73%

Indoor Humidity73% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility5 mi

Cloud Ceiling2000 ft

9 PM

71°

RealFeel® 70°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Cloudy

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

WindSW 7 mph

Air QualityFair

Wind Gusts10 mph

Humidity78%

Indoor Humidity78% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility5 mi

Cloud Ceiling2000 ft

10 PM

71°

RealFeel® 70°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Cloudy

Coastal Flood Advisory

6:00 PM Monday - 11:00 PM Wednesday

WindSW 6 mph

Air QualityFair

Wind Gusts8 mph

Humidity79%

Indoor Humidity79% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover95%

Visibility5 mi

Cloud Ceiling2000 ft

11 PM

71°

RealFeel® 70°

Pleasant

RealFeel Guide

Pleasant

63° to 81°

Most consider this temperature range ideal.

0%

Cloudy

WindSW 6 mph

Air QualityFair

Wind Gusts6 mph

Humidity79%

Indoor Humidity79% (Humid)

Dew Point64° F

AccuLumen Brightness Index™0 (Dark)

Cloud Cover99%

Visibility5 mi

Cloud Ceiling1800 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 78° with a RealFeel® of 83°, 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.

Further Ahead

Tomorrow

Friday

10-Day

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Winter Center

Top Stories

Hurricane

Tropical Storm Cristobal forms in Atlantic, another may follow soon

6 hours ago

Astronomy

Photos: Total solar eclipse captured over Spain, Iceland, Portugal

2 hours ago

Severe Weather

Derecho unleashes 90+ mph winds, spawns tornadoes in Midwest

3 hours ago

Severe Weather

Severe storms, flash flooding to threaten Plains, Midwest and East

2 hours ago

Astronomy

Perseid meteor shower peaks Wednesday night under ideal conditions

11 hours ago

Featured Stories

Climate

July’s record heat is the latest sign of a hotter US climate

2 hours ago

Recreation

Bald eagle Jackie dies after more than 3 weeks of intensive care

1 day ago

Recreation

Shark pulls lifeguard underwater at Maine state park

1 day ago

Weather News

From car crashes to compost: 5 surprising ways wildfires can start

1 day ago

Climate

How extreme heat could affect your grocery bill

1 day ago

World North America United States California Costa Mesa

Weather Near Costa Mesa:

Anaheim, CA
Long Beach, CA
Los Angeles, CA

Company

Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us

Products & Services

For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations

Apps & Downloads

iPhone App Android App See all Apps & Downloads

Subscription Services

AccuWeather Premium AccuWeather Professional

More

AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center

Company

Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us

Products & Services

For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations

Apps & Downloads

iPhone App Android App See all Apps & Downloads

Subscription Services

AccuWeather Premium AccuWeather Professional

More

AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center

© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.

Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...