Weather in Costa Mesa, CA
Updated 2026-09-26 07:00 local time · ZIP codes 92626, 92627
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
73°19% rain74°17% rain76°14% rain
78°4% rain80°12% rain81°11% rain82°10% rain
82°7% rain82°3% rain81°5% rain
82°1% rain81°10% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Today vs yesterday in Costa Mesa
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 19%).
It feels like 78°F with winds near 2 mph.
78°F, 4% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 22 mph.
Current temperature is 73°F, wind 2 mph, rain chance up to 19%.
UV index is 0.
Local weather characteristics in Costa Mesa
California weather varies from cool marine conditions along parts of the Pacific coast to hot inland valleys, deserts and snowy mountain climates. Short distances can produce large temperature differences.
Costa Mesa is part of the West weather region. The forecast point is near 33.64°N latitude and 117.92°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Costa Mesa weather today
Overcast and 73°F in Costa Mesa, CA. Today's high is 82°F with a 12% rain chance. Winds are around 2 mph with gusts near 8 mph. Relative humidity is 72%, pressure is 29.85 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Costa Mesa
Sunrise is at 06:42 AM and sunset is at 06:43 PM. Tomorrow's forecast calls for Sunny with a high near 79°F and a low near 72°F. The maximum rain chance is 4%.