Weather forecast for tomorrowCosta Mesa, CA
Weather forecast for tomorrow
Monday Oct 19, 2026
- 79°F
- 64°F
Mostly Sunny
- Precip. probability: 10%
- Precipitation: 0"
- Wind: 9mphS 185°
- Humidity: 63%
- UV index: 6
- Sunrise: 6:59 am PDT
- Sunset: 6:13 pm PDT
- details ▼
Tomorrow, in Costa Mesa, expect plenty of sunshine and only a few scattered clouds.
A temperature range of a temperate 78.8°F to a breezy 64.4°F is forecasted.
Expect a warmer feel as the forecasted high matches September's 76.1°F, rather than October's average of 73°F.
Sunrise will be at 6:59 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 13min.
A temperature range of a temperate 78.8°F to a breezy 64.4°F is forecasted.
Expect a warmer feel as the forecasted high matches September's 76.1°F, rather than October's average of 73°F.
Sunrise will be at 6:59 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 13min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 81°C.
Coldest hour: 6 am 66°C.
Coldest hour: 6 am 66°C.
Chance of precipitation
Highest chance: 9 pm 13%.
Hourly weather forecast
- 12 am
- 70°F
- Feels like:70°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 2mphS 181°
- Humidity: 70%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 2 am
- 68°F
- Feels like:68°F
Clear
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 1mphSE 143°
- Humidity: 78%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 4 am
- 66°F
- Feels like:66°F
Mostly Clear
- Precip. probability: 12%
- Precipitation: 0"
- Wind: 1mphSSE 149°
- Humidity: 80%
- Pressure: 29.88"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 6 am
- 66°F
- Feels like:66°F
Mostly Clear
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 1mphE 98°
- Humidity: 80%
- Pressure: 29.88"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
Sunrise: 6:59 am
- 8 am
- 68°F
- Feels like:68°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 2mphE 93°
- Humidity: 77%
- Pressure: 29.91"Hg
- Visibility: 7mi
- UV index: 0
- details ▼
- 10 am
- 73°F
- Feels like:73°F
Partly Cloudy
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphS 175°
- Humidity: 63%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 3
- details ▼
- 12 pm
- 77°F
- Feels like:79°F
Mostly Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 7mphSSW 204°
- Humidity: 54%
- Pressure: 29.91"Hg
- Visibility: 9mi
- UV index: 6
- details ▼
- 2 pm
- 77°F
- Feels like:81°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 9mphSSW 207°
- Humidity: 55%
- Pressure: 29.85"Hg
- Visibility: 9mi
- UV index: 5
- details ▼
- 4 pm
- 77°F
- Feels like:77°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 9mphSSW 212°
- Humidity: 58%
- Pressure: 29.83"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 6 pm
- 73°F
- Feels like:73°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSSW 205°
- Humidity: 67%
- Pressure: 29.83"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:13 pm
- 8 pm
- 70°F
- Feels like:72°F
Mostly Clear
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 4mphSSW 198°
- Humidity: 79%
- Pressure: 29.83"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 70°F
- Feels like:70°F
Mostly Clear
- Precip. probability: 13%
- Precipitation: 0"
- Wind: 4mphS 185°
- Humidity: 82%
- Pressure: 29.85"Hg
- Visibility: 6mi
- UV index: 0
- details ▼
Tomorrow, on Monday, primarily bright and occasionally cloudy weather is forecasted.
The temperature will vary between the lowest temperature of 66.2°F and the highest temperature of 78.8°F. The warmest part of the day is expected around 1 pm.
The temperature will feel more resembling September's average high than the expected maximum for October. The expected low will be in line with the average minimum in October, which is 62.1°F.
The temperature will vary between the lowest temperature of 66.2°F and the highest temperature of 78.8°F. The warmest part of the day is expected around 1 pm.
The temperature will feel more resembling September's average high than the expected maximum for October. The expected low will be in line with the average minimum in October, which is 62.1°F.
Updated: Oct 18, 2026 @ 16:23:41 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
Tomorrow, in Costa Mesa, mostly sunny weather is likely, with high visibility.
Tomorrow, the highest temperature will be 78.8°F, while the lowest temperature will be 64.4°F.
The highest temperature will be slightly warmer than the average maximum of 73°F in October. The lowest temperature will be in line with the average low of 62.1°F.
The highest temperature will be slightly warmer than the average maximum of 73°F in October. The lowest temperature will be in line with the average low of 62.1°F.
On Monday, in Costa Mesa, sunrise will be at 6:59 am and sunset at 6:13 pm (PDT).
In Costa Mesa, tomorrow, there will be 11h and 13min of daylight.
