Weather forecast for: Costa Mesa CA
Last Update: 2:30 am PDT Sep 15, 2026
Today: Mostly cloudy, then gradually becoming sunny, with a high near 77. East wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Tonight: Increasing clouds, with a low around 64. South wind around 5 mph.
Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 76. South wind 5 to 10 mph.
Wednesday Night: Partly cloudy, with a low around 63. South wind around 5 mph becoming calm after midnight.
Thursday: Sunny, with a high near 77. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Thursday Night: Mostly clear, with a low around 63.
Friday: Sunny, with a high near 79.
Friday Night: Mostly clear, with a low around 64.
Saturday: Sunny, with a high near 79.
Saturday Night: Mostly clear, with a low around 64.
Sunday: Mostly sunny, with a high near 78.
Sunday Night: Mostly clear, with a low around 64.
Monday: Mostly sunny, with a high near 77.
WeatherWorld.com
City of Costa Mesa, California
