I-405 CA weather conditions near Costa Mesa Weather, California

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Overcast 66°F 2025-08-09T04:30:00
• Today 2025-08-09, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 78. Light west wind increasing to 5 to 10 mph in the morning.
• Tonight 2025-08-09, Increasing Clouds. Increasing clouds, with a low around 65. West wind around 5 mph becoming calm in the evening.
• Sunday 2025-08-10, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 78. Light west wind becoming southwest 5 to 10 mph in the morning.
• Sunday Night 2025-08-10, Patchy Fog. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 65. West wind around 5 mph becoming calm in the evening.
• Monday 2025-08-11, Patchy Fog then Sunny. Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.
• Monday Night 2025-08-11, Patchy Fog. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 66.
• Tuesday 2025-08-12, Patchy Fog then Sunny. Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 78.
• Tuesday Night 2025-08-12, Increasing Clouds. Increasing clouds, with a low around 67.
• Wednesday 2025-08-13, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 77.
• Wednesday Night 2025-08-13, Increasing Clouds. Increasing clouds, with a low around 65.
• Thursday 2025-08-14, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 76.
• Thursday Night 2025-08-14, Increasing Clouds. Increasing clouds, with a low around 64.
• Friday 2025-08-15, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 76.