The National Weather Service says gusty winds are whipping up waves as high as 4 feet early Friday off Santa Barbara County. Several days of calm seas had helped crews.
A small watercraft advisory was issued overnight and Santa Barbara news station KEYT-TV says oil skimming vessels were brought in late Thursday because of bad weather.
Crews have yet to excavate the section of pipeline that broke Tuesday, spilling an estimated 105,000 gallons of crude. About 21,000 gallons is believed to have made it to the sea and split into slicks that stretched 9 miles along the coast.
As of Thursday, more than 9,000 gallons had been raked, skimmed and vacuumed up.