I-405 CA weather conditions near Costa Mesa, California

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Mostly Cloudy 64°F 2026-05-05T10:00:00
• Today 2026-05-05, Sunny. Sunny, with a high near 65. West wind 10 to 15 mph, with gusts as high as 25 mph.
• Tonight 2026-05-05, Partly Cloudy. Partly cloudy, with a low around 55. West wind 5 to 10 mph, with gusts as high as 20 mph.
• Wednesday 2026-05-06, Mostly Sunny. Mostly sunny, with a high near 71. Light south wind increasing to 5 to 10 mph in the morning.
• Wednesday Night 2026-05-06, Mostly Clear. Mostly clear, with a low around 55. West wind around 5 mph becoming calm in the evening.
• Thursday 2026-05-07, Sunny. Sunny, with a high near 73. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
• Thursday Night 2026-05-07, Mostly Clear. Mostly clear, with a low around 57.
• Friday 2026-05-08, Patchy Fog then Sunny. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 74.
• Friday Night 2026-05-08, Mostly Clear. Mostly clear, with a low around 58.
• Saturday 2026-05-09, Sunny. Sunny, with a high near 77.
• Saturday Night 2026-05-09, Mostly Clear. Mostly clear, with a low around 59.
• Sunday 2026-05-10, Sunny. Sunny, with a high near 78.
• Sunday Night 2026-05-10, Mostly Clear. Mostly clear, with a low around 59.
• Monday 2026-05-11, Mostly Sunny. Mostly sunny, with a high near 80.