Fire crews took advantage of improved conditions as the high winds and hot, dry air of recent days were replaced by the normal Pacific air, significantly reducing fire activity.
The 44-square-mile blaze at the western end of the Santa Monica Mountains was 60 percent surrounded Sunday morning.
Full containment was expected Monday, according to Ventura County fire officials.
Meanwhile, officials said Sunday that an "undetermined roadside ignition of grass and debris" off the Ventura Freeway sparked the Springs Fire, the region's largest wildfire so far this year, NBC 4 Southern California reported.
The progress made fighting the fire Saturday, led authorities to lift evacuation orders Saturday for residences in several areas.
"The fire isn't really running and gunning," said Tom Kruschke, a Ventura County Fire Department spokesman.
The National Weather Service said an approaching low pressure system would bring a 20 percent chance of showers Sunday afternoon, with the likelihood increasing into the night and on Monday.
Nearly 2,000 firefighters using engines, bulldozers and aircraft worked to corral the blaze.
Firefighting efforts were focused on the fire's east side, rugged canyons that are a mix of public and private lands, Kruschke said.
The change in the weather was also expected to bring gusty winds to some parts of Southern California, but well away from the fire area.
Despite its size and speed of growth, the fire that broke out Thursday and quickly moved through neighborhoods of Camarillo Springs and Thousand Oaks has caused damage to just 15 homes, though it has threatened thousands.
The fire also swept through Point Mugu State Park, a hiking and camping area that sprawls between those communities and the ocean. Park district Superintendent Craig Sap told the Ventura County Star that two old, unused ranch-style homes in the backcountry burned. Restrooms and campgrounds also were damaged. Sap estimated repairs would cost $225,000.
The only injuries as of Saturday were a civilian and a firefighter involved in a traffic accident away from the fire.
Residents were grateful so many homes were spared.
"It came pretty close. All of these houses — these firemen did a tremendous job. Very, very thankful for them," Shayne Poindexter said. Flames came within 30 feet of the house he was building.
On Friday, the wildfire reached the ocean, jumped Pacific Coast Highway and burned a Navy base rifle range on the beach at Point Mugu. When winds reversed direction from offshore to onshore, the fire stormed back up canyons toward inland neighborhoods.
The blaze is one of more than 680 wildfires in the state so far this year — about 200 more than average.
East of Los Angeles in Riverside County, a new fire that broke out Saturday afternoon burned 650 acres of wilderness south of Banning. It was 30 percent contained Sunday. Banning has been flanked by a nearly 5-square-mile fire to the north which destroyed one home shortly after it broke out Wednesday. That fire was fully contained late Saturday.
In Northern California, a fire that has blackened more than 10 square miles of wilderness in Tehama County was a threat to 10 unoccupied summer homes near the community of Butte Meadows, according to the California Department of Forestry and Fire Protection.
Thunderstorms were expected to bring erratic winds but little rain to the area about 200 miles north of San Francisco.
Nearly 1,300 firefighters were on the lines and the blaze, which started Wednesday, was 20 percent contained.