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: Overcast 63°F 2025-11-15T06:16:00 
Today 2025-11-15, Heavy Rain. Rain and possibly a thunderstorm before 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. High near 66. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Tonight 2025-11-15, Showers. Showers likely and possibly a thunderstorm, then showers after 10pm. Low around 56. South wind around 5 mph becoming east after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday 2025-11-16, Chance Showers. A chance of showers, mainly before 4pm. Mostly cloudy, with a high near 64. South wind 5 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night 2025-11-16, Chance Showers. A chance of showers, mainly after 10pm. Mostly cloudy, with a low around 55. South wind around 5 mph becoming calm. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday 2025-11-17, Heavy Rain. A chance of showers before 10am, then rain likely after 10am. The rain could be heavy at times. Mostly cloudy, with a high near 63. Southeast wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night 2025-11-17, Rain Likely. Rain likely. Cloudy, with a low around 52. Chance of precipitation is 70%.
Tuesday 2025-11-18, Chance Showers. A chance of showers. Partly sunny, with a high near 62. Chance of precipitation is 50%.
Tuesday Night 2025-11-18, Chance Showers. A chance of showers, mainly before 10pm. Partly cloudy, with a low around 51.
Wednesday 2025-11-19, Sunny. Sunny, with a high near 65.Wednesday Night 2025-11-19, Mostly Clear then Slight Chance Showers. A slight chance of showers after 4am. Increasing clouds, with a low around 53.
Thursday 2025-11-20, Chance Showers. A chance of showers. Partly sunny, with a high near 64.
Thursday Night 2025-11-20, Heavy Rain. A chance of showers. The rain could be heavy at times. Mostly cloudy, with a low around 52.- Friday 2025-11-21, Heavy Rain. A chance of showers. The rain could be heavy at times. Partly sunny, with a high near 64.