A dense fog advisory is in effect for the Central Coast and northern Santa Barbara County through 8 a.m. Visibility will be around 1/4 mile or less out on the highways, so it's important for motorists to have low beams on and to increase following distance. The fog will start to lift a few hours after sunrise for the coastal valleys, but it will be stubborn to clear for the coastline. The foggy afternoon skies will result in cooler daytime highs at the coast with temperatures from the low to upper 60s.
The high-pressure ridge that has been causing the sweltering daytime highs for the inland valleys has weakened, which means temperatures will be slightly cooler over the weekend. Daytime highs for the inland valleys will be close to the upper 80s and mid-90s Friday and will continue to cool down by a few degrees through Sunday. The coastal valleys will be right around the mid to upper 70s Friday with mostly clear skies.
Southeasterly to northwesterly winds will be fairly mild and range from 10-20 miles per hour Friday.