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 66°F 2025-08-16T06:15:00 
Today 2025-08-16, Decreasing Clouds. Cloudy, then gradually becoming mostly sunny, with a high near 76. Southwest wind around 5 mph.
Tonight 2025-08-16, Increasing Clouds. Increasing clouds, with a low around 65. South wind around 5 mph.- Sunday 2025-08-17, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 76. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
- Sunday Night 2025-08-17, Increasing Clouds. Increasing clouds, with a low around 65. West wind around 5 mph becoming calm in the evening.
- Monday 2025-08-18, Becoming Sunny. Cloudy through mid morning, then gradual clearing, with a high near 78. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Monday Night 2025-08-18, Increasing Clouds. Increasing clouds, with a low around 65.- Tuesday 2025-08-19, Becoming Sunny. Mostly cloudy through mid morning, then gradual clearing, with a high near 79.
- Tuesday Night 2025-08-19, Increasing Clouds. Increasing clouds, with a low around 65.
- Wednesday 2025-08-20, Decreasing Clouds. Mostly cloudy, then gradually becoming sunny, with a high near 81.
Wednesday Night 2025-08-20, Patchy Fog. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 67.Thursday 2025-08-21, Patchy Fog then Sunny. Patchy fog. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83.
- Thursday Night 2025-08-21, Patchy Fog. Patchy fog. Otherwise, increasing clouds, with a low around 69.