weather in del mar california
1 There is 84 percentage chance of rain and 3 mph winds from the Northwest. 2  5am:The Del Mar, CA forecast for Aug 18 is 65 degrees and Partly Cloudy. There is 78 percentage chance of rain and 2 mph winds from the East.  8am:The Del Mar, CA forecast for Aug 18 is 75 degrees and Partly Cloudy.