Weather forecast for todayCosta Mesa, CA
Weather forecast for today
Current condition 2:46 pm PDT
- 88°F
- Feels like:88°F
Partly Cloudy
- Precipitation: 0"
- Wind: 6mphS 190°
- Humidity: 22%
- Dewpoint: 45°F
- Pressure: 29.95"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
At the moment, in Costa Mesa, a mix of cloud cover and clear skies can be seen.
The temperature is a hot 87.8°F. The current temperature is almost at the maximum of today's predicted 89.6°F.
The temperature is a hot 87.8°F. The current temperature is almost at the maximum of today's predicted 89.6°F.
Saturday Oct 17, 2026
- 90°F
- 68°F
Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 7mphSW 231°
- Humidity: 26%
- UV index: 5
- Sunrise: 6:58 am PDT
- Sunset: 6:15 pm PDT
- details ▼
Today, in Costa Mesa, expect mostly gray skies with limited brightness.
The temperature will vary between a maximum of a tropical 89.6°F and a minimum of a delightful 68°F.
Today, the maximum temperature of 89.6°F will resemble September's climate more than October's.
Sunrise was at 6:58 am and sunset will be at 6:15 pm; the daylight will last for 11h and 17min.
The temperature will vary between a maximum of a tropical 89.6°F and a minimum of a delightful 68°F.
Today, the maximum temperature of 89.6°F will resemble September's climate more than October's.
Sunrise was at 6:58 am and sunset will be at 6:15 pm; the daylight will last for 11h and 17min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 88°C.
Coldest hour: 11 pm 75°C.
Coldest hour: 11 pm 75°C.
Chance of precipitation
Highest chance: 5 pm 3%.
Hourly weather forecast
- 3 pm
- 88°F
- Feels like:88°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphSW 219°
- Humidity: 23%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 86°F
- Feels like:86°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 7mphSW 225°
- Humidity: 23%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 5 pm
- 84°F
- Feels like:84°F
Cloudy
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 6mphWSW 238°
- Humidity: 27%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 pm
- 82°F
- Feels like:82°F
Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphWSW 237°
- Humidity: 34%
- Pressure: 29.91"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:15 pm
- 7 pm
- 81°F
- Feels like:81°F
Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 5mphWSW 250°
- Humidity: 37%
- Pressure: 29.94"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 8 pm
- 79°F
- Feels like:79°F
Mostly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphSW 231°
- Humidity: 40%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 9 pm
- 79°F
- Feels like:79°F
Mostly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphSW 232°
- Humidity: 39%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 77°F
- Feels like:77°F
Mostly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphS 190°
- Humidity: 40%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 11 pm
- 75°F
- Feels like:75°F
Mostly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphSSE 153°
- Humidity: 41%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 12 am
- 75°F
- Feels like:75°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphSSE 153°
- Humidity: 41%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 1 am
- 73°F
- Feels like:73°F
Mostly Clear
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphESE 117°
- Humidity: 44%
- Pressure: 29.97"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
For the remainder of Saturday, expect mostly cloudy skies.
The temperature will be between a maximum of 87.8°F and a minimum of 75.2°F. The hottest part of the day will be around 3 pm.
The temperature will feel more consistent with September's average high than the expected maximum for October. Forecasts show a temperature also more close to September's average minimum of 64.2°F rather than the October average of 62.1°F.
The temperature will be between a maximum of 87.8°F and a minimum of 75.2°F. The hottest part of the day will be around 3 pm.
The temperature will feel more consistent with September's average high than the expected maximum for October. Forecasts show a temperature also more close to September's average minimum of 64.2°F rather than the October average of 62.1°F.
Updated: Oct 17, 2026 @ 21:46:51 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Currently (2:46 pm PDT) it is 87.8°F in Costa Mesa.
Today, in Costa Mesa, expect persistent cloudiness.
Today, the highest temperature will be 89.6°F, while the lowest temperature will be 68°F.
Today, the maximum temperature will be significantly higher than the average highest temperature of 73°F in October. Today, the lowest temperature will be a few degrees higher than the average low temperature.
Today, the maximum temperature will be significantly higher than the average highest temperature of 73°F in October. Today, the lowest temperature will be a few degrees higher than the average low temperature.
On Saturday, in Costa Mesa, sunrise was at 6:58 am and sunset will be at 6:15 pm (PDT).
In Costa Mesa, today, there will be 11h and 17min of daylight.
Costa Mesa, California, USA
- en: Costa Mesa, California, USA
- es: Costa Mesa, California, EE.UU.
- hr: Kosta Mesa, Kalifornija, SAD
- mk: Kosta Mesa, Kalifornija, SAD
- sr: Kosta Mesa, Kalifornija, SAD
- zh: 科斯塔梅萨, 加利福尼亚州, 美国
- Latitude: 33.641132°
- Longitude: -117.918669°
- Elevation: 98 ft
- Current time: 3:21pm PDT
- Sunrise: 6:58 am PDT
- Sunset: 6:15 pm PDT
- Timezone: America/Los_Angeles
Nearby Costa Mesa, California, USA
- Newport Beach (2 mi)
- Corona Del Mar (4 mi)
- Huntington Beach (5 mi)
- Fountain Valley (5 mi)
- Newport Coast (6 mi)
- Irvine (7 mi)
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- Midway City (8 mi)
- Westminster (9 mi)
- Tustin (9 mi)
- Garden Grove (9 mi)
- East Irvine (9 mi)
- Laguna Beach (11 mi)
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- Stanton (12 mi)
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- Seal Beach (13 mi)
- Lake Forest (13 mi)
- Laguna Hills (13 mi)
- Anaheim (14 mi)
- Villa Park (14 mi)
California, USA - most visited locations
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