A strengthening offshore flow, coupled with building high pressure, will create a warming trend in Southern California into next week, according to forecasts.

Highs will likely be 5 to 15 degrees above normal for this time of year by Sunday, according to the National Weather Service. Temperatures in valley and low desert areas were expected to hit the early 80s.

Forecasters predict predominately clear skies, with few passing clouds this weekend.

Meanwhile, high surf conditions would return to the Ventura Harbor and Central Coast on Thursday and Friday amid a long period west-northwest swell, according to the weather service.

Surf will peak Thursday into early Friday, with breakers of 10 to 15 feet and max sets of up to 18 feet possible along the Central Coast.

West facing beaches in Ventura County can expect 6 to 8 foot breakers between Thursday afternoon and early Friday, with local sets possibly hitting 10 feet near Ventura Harbor.

The harbor also faced the threat of large breaking waves during the extended period of high surf.

Surf levels along coastal Los Angeles County will be lower, ranging between 4 to 6 feet, with local sets of up to 8 feet, according to the weather service.

Because of the high surf conditions, forecasters warned of dangerous rip currents and sneaker waves through Friday, and inexperienced swimmers and surfers were told to avoid ocean waters.