AccuWeather forecast: Welcome to fall

The first day of fall will be a pleasant one with sunny skies and comfortable temperatures. Some patchy is at the coast this morning, but sunny skies will be the rule this afternoon. A seasonable weather pattern lasts through midweek, then temps warm a bit Friday with the passage of a trough to the north.

VIDEO: Meteorologist Mike Nicco has your AccuWeather forecast

LIVE: Track Bay Area air quality levels

Saturday a warm-up ensues with breezy offshore winds, low relative humidity. Highs will be in the 80s and 90s to start the weekend but even hotter & drier weather arrives Sunday. Highs will soar into the 90s & 100s by Sunday. These drying winds & heat look to last into next week. A reversal of the winds, out of the south will bring a cooldown, but perhaps not until September 30.

A large northwest swell will arrive late Thursday bringing increased wave heights breaking near the shoreline & rip currents. With the hot weather, beachgoers are advised to use caution.

Today's highs
Santa Rosa 83
Concord 85
San Francisco 68
Oakland 73
San Jose 79

A foggy start,then Sunny.
Highs: 66-71.
Tonight: Becoming cloudy.
Lows in the mid to upper 50s.
East Bay:

Sunny & pleasant.
Highs: In the low to mid 70s.
Tonight: Patchy clouds.
Lows: In the upper 50s.

East Bay Valleys:
Sunny & pleasant.
Highs in the mid-80s.
Tonight: Clear skies.
Lows: In the mid to upper 50s.

North Bay:
Morning fog,then sunny.
Highs: 76-84.
Tonight: Mostly clear.
Lows: 51-56.
Patchy morning fog,then sunny & mild.

Highs: 73-76.
Tonight: Fog returns.
Lows in the upper 50s.

South Bay:
Sunny & nice.
Highs: In the upper 70s.
Tonight: Clear skies.
Lows: 55-58.

Better air quality.
Highs: 66-86.

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