Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Last Update: 303 AM PDT Fri Sep 4 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 10 seconds and SW 3 ft at 17 seconds. Patchy dense fog early this morning.

Tonight

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 10 seconds and SW 3 ft at 17 seconds.

Sat

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 10 seconds and S 3 ft at 16 seconds.

Sat Night

NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 9 seconds and SW 3 ft at 16 seconds.

Sun

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: N 4 ft at 8 seconds and S 3 ft at 14 seconds.

Sun Night

NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 7 seconds and S 3 ft at 14 seconds.

Labor Day

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 7 seconds and SW 4 ft at 14 seconds.

Mon Night

NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Seas 3 to 5 ft. Wave detail: NW 3 ft at 7 seconds and S 4 ft at 14 seconds.

Tue

NW wind around 5 kt. Seas 3 to 5 ft. Wave detail: NW 3 ft at 8 seconds and SW 4 ft at 13 seconds.

Tue Night

NW wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 3 to 5 ft. Wave detail: NW 3 ft at 7 seconds and SW 3 ft at 12 seconds.

.....san francisco bar/fourfathom bank forecast.....

in the deep water channel...mixed seas of 3 to 5 ft at 10 seconds.

across the bar...swell can be more than twice as high across the bar than surrounding waters. Waves are also more prone to break, particularly during strong ebb currents. Maximum ebb current of 0.9 kt at 11:04 am friday and 3.0 kt at 10:15 pm friday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 5 ft at 10 seconds. ACROSS THE BAR...Swell can be more than twice as high across the bar than surrounding waters. Waves are also more prone to break, particularly during strong ebb currents. Maximum ebb current of 0.9 kt at 11:04 AM Friday and 3.0 kt at 10:15 PM Friday.