I-405 CA weather conditions near Costa Mesa, California
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Clear 50°F 2025-11-19T05:15:00 
Today 2025-11-19, Sunny. Sunny, with a high near 65. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tonight 2025-11-19, Slight Chance Showers. A slight chance of showers between 10pm and 4am. Partly cloudy, with a low around 51. Calm wind becoming southeast around 5 mph. Chance of precipitation is 20%.
Thursday 2025-11-20, Heavy Rain. Showers and possibly a thunderstorm, mainly after 4pm. Some of the storms could produce heavy rainfall. High near 62. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night 2025-11-20, Heavy Rain. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 52. East wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday 2025-11-21, Chance Showers. A chance of showers. Partly sunny, with a high near 64. East wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night 2025-11-21, Chance Showers. A chance of showers. Partly cloudy, with a low around 52. Chance of precipitation is 30%.
Saturday 2025-11-22, Mostly Sunny. Mostly sunny, with a high near 70.
Saturday Night 2025-11-22, Mostly Clear. Mostly clear, with a low around 53.- Sunday 2025-11-23, Sunny. Sunny, with a high near 70.
- Sunday Night 2025-11-23, Mostly Clear. Mostly clear, with a low around 52.
- Monday 2025-11-24, Sunny. Sunny, with a high near 70.
Monday Night 2025-11-24, Partly Cloudy. Partly cloudy, with a low around 53.- Tuesday 2025-11-25, Mostly Sunny. Mostly sunny, with a high near 68.