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: Rain 63°F 2025-11-14T02:45:00 
Overnight 2025-11-14, Showers Likely. Showers likely. Cloudy, with a low around 61. Southeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday 2025-11-14, Showers. Showers, with thunderstorms also possible after 4pm. High near 68. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night 2025-11-14, Showers. Showers and possibly a thunderstorm. Low around 60. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday 2025-11-15, Heavy Rain. Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 66. Southeast wind 10 to 20 mph becoming southwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.- Saturday Night 2025-11-15, Showers. Showers and possibly a thunderstorm. Low around 55. South wind 5 to 10 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday 2025-11-16, Chance Showers. A chance of showers, mainly before 4pm. Mostly cloudy, with a high near 64. Chance of precipitation is 50%.
Sunday Night 2025-11-16, Chance Showers. A chance of showers, mainly after 10pm. Mostly cloudy, with a low around 54. Chance of precipitation is 50%.
Monday 2025-11-17, Showers Likely. Showers likely. Mostly cloudy, with a high near 64.
Monday Night 2025-11-17, Showers Likely. Showers likely. Mostly cloudy, with a low around 53.- Tuesday 2025-11-18, Chance Showers. A chance of showers. Partly sunny, with a high near 64.
- Tuesday Night 2025-11-18, Chance Showers. A chance of showers. Mostly cloudy, with a low around 51.
Wednesday 2025-11-19, Mostly Sunny. Mostly sunny, with a high near 65.
Wednesday Night 2025-11-19, Partly Cloudy. Partly cloudy, with a low around 52.- Thursday 2025-11-20, Slight Chance Showers. A slight chance of showers. Partly sunny, with a high near 65.