How will winds affect Bay Area weather this weekend?

Winds off the coast of Southern California blew the waters of the California Current, an area of ​​cold ocean water that runs along the state’s coast, and brought a southerly wave into San Francisco Bay on Thursday.

Now, a new pattern is at play, as winds from the northwest revitalize the marine layer and cause temperatures to drop. Weather models predict that temperatures will drop by 5 to 7 degrees across the interior valleys of the Gulf region, but there is a greater temperature swing. Expected for residents of coastal cities and Gulf beaches like San Francisco and Oakland. Temperatures there this weekend will drop by 10-15 degrees compared to the heat wave on Wednesday.

The strongest winds from this surge will likely hit Bodega Bay, Point Reyes in the North Bay, and a stretch of Highway 1 between Santa Cruz and Davenport, where wind speeds of up to 40 mph are possible from 1 to 7 p.m. Friday and Saturday. That will keep temperatures in the upper 60s along those stretches of the coast — about 7-10 degrees cooler than they were earlier in the week.

San Franciscans and Oaklanders can expect lighter winds of up to 30 mph and highs in the 70s, although afternoon winds of up to 35 mph are not out of the question for ferry riders.

However, a high pressure area is scheduled to reach Northern California at the end of the weekend. This may raise temperatures on Sunday by 3-5 degrees. It’s too early to tell if this will be the start of warm weather next week.

Weekend breakdown

San Francisco: Look for a cool, mostly cloudy Friday with high temperatures in the mid-60s in the hills and along Ocean Beach, the Presidio and the Golden Gate Bridge. San Franciscans along Market Street will feel the rush of offshore breezes gusting up to 20 mph in the afternoon. Look for temperatures just below 60 degrees in the Castro, Mission and downtown.

San Franciscans can expect more of a foggy weather pattern Friday afternoon and Saturday, with partly cloudy skies, winds up to 20 mph and highs in the upper 60s on the west side and lower 70s east of Sutro Tower. High pressure returns Sunday morning. Expect a mostly sunny afternoon with light winds and highs in the lower 70s.

Overnight temperatures will generally drop into the upper 50s.

East Bay: A veil of fog and mist was in store for residents in the Oakland and Berkeley Hills Friday morning. Look for a sunny afternoon with light winds and highs in the lower 70s in Jack London Square and Alameda, and temperatures reach the mid-70s in downtown Oakland, Richmond, Fremont and Hayward. Inland residents of the Tri-Valley area can also expect sunny skies with highs in the mid-80s.

Warm, dry winds will promote sunny skies and daytime temperatures in the mid to upper 80s for residents in Walnut Creek, Dublin and Pleasanton on Saturday. The warming trend continues through Sunday with highs reaching the lower 90s. However, a light delta breeze should cool the afternoon by 5 degrees after 4 p.m

Overnight temperatures this weekend will likely range from the upper 50s on the Gulf Shore to the mid 60s inland.

North Bay: Weather models are predicting a significant increase in fog and fog in the Wine Country on Friday and Saturday morning. This will be followed by partly cloudy skies, light winds, and highs in the low to mid 80s along the Highway 101 corridor between Mill Valley and Santa Rosa. By Sunday, expect less fog in the morning and a sunny afternoon with temperatures reaching the upper 80s across the interior valleys.

Gulf Beach residents – in Tiburon, Sausalito and San Quentin – can expect fog and mist in the morning hours. Look for sunshine and afternoon temperatures in the low to mid 70s on Friday and Saturday and upper 70s on Sunday. Breezes will ward off some of the heat in Vallejo, Benicia and the Carquinez Highlands. Delta residents can expect weekend highs in the mid 80s.

Overnight temperatures will likely drop into the upper 50s in the water and lower into the 60s in Wine Country.