Costa Mesa weather — 10-day forecast
Temperature, rain, wind and feels-like in Costa Mesa, hour by hour and over 10 days, with the seasonal normal for context.
Now
Reading from 05:00 · NOAA HRRR model
22 °C
Overcast
Feels like 20 °C
Next 12 h
- 0523°
- 0622°
- 06:59Sunrise
- 0721°
- 0822°
- 0926°
- 1031°
- 1131°
- 1232°
- 1334°
- 1434°
- 1531°
- 1631°
- 1730°
↓ 21°07:00↑ 34°13:00
- Humidity
- 31 %
- Dew point
- 4 °C
- Gusts
- 5.5 km/h
- Clouds
- 89 %
- Pressure
- 1,016 hPa ↓
Grid point 0.2 km away · 3.0 km grid · elevation 27 m
Air quality
The European air-quality index for the city, and the pollutants that set it.
Index set by PM2.5
- PM2.5
- 8.8µg/m³
- PM10
- 17.0µg/m³
- Ozone
- 14.0µg/m³
- Nitrogen dioxide
- 27.9µg/m³▲
- Sulphur dioxide
- 0.8µg/m³
- Carbon monoxide
- 162.0µg/m³
- Dust (AOD)
- 0.06
Generated using Copernicus Atmosphere Monitoring Service information
Hour by hour
Step-by-step detail: temperature, wind, cloud cover and ultraviolet.
9 days
Each day's extremes and the chance of rain, out to the end of the run.
Rain probability (> 1 mm): 50 ECMWF ensemble members.
Today
Mainly clear
34°
21°
Sun
Clear sky
29°
18°
Mon
Clear sky
26°
19°
Tue
Mainly clear18 %
23°
19°
Wed
Light showers18 %
22°
19°
Thu
Light rain7 mm
20°
18°
Fri
Mainly clear
21°
17°
Sat
Partly cloudy
22°
17°
Sun
Light drizzle2 mm
21°
16°
Sun and UV
Sunrise, sunset, day length and ultraviolet intensity.
- Sunrise
- 06:59
- Daylight
- 11 h 17
- Sunset
- 18:16
Radiation · 17.3 MJ/m²
Sea state
Sea state at the marine grid point closest to the city.
Significant height: the mean of the highest third of waves. Individual waves reach about twice it.
Data: ECMWF
Today in Costa Mesa the mean temperature will be 26.3 °C — +7.2 °C against the normal for 17 October, measured from 1940 to 2026. (1,290 obs.)
Nearby cities
The climate around Costa Mesa