Severe Thunderstorms and Heavy Rainfall in the Ohio Valley and Great Lakes; Winter Weather in the Northern Tier

A slow moving front extending from the Great Lakes region into the Plains will bring snow, wintry mix, and ice accumulation north of the front from the Upper Midwest into New England, and severe weather and heavy rain south of the front. Scattered severe thunderstorms with damaging gusts, severe hail, and heavy rain are expected across parts of the Great Lakes/Midwest through tonight. Read More >

Hazardous Weather Conditions

Small Craft Advisory in effect from April 1, 03:00 PM PDT until April 3, 03:00 AM PDT

Last Update: 855 PM PDT Tue Mar 31 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Tonight

SW wind 5 to 10 kt. Seas around 3 ft. Wave detail: S 2 ft at 5 seconds and NW 3 ft at 10 seconds. A chance of rain.

Wed

SW wind 10 to 15 kt. Seas around 3 ft. Wave detail: S 2 ft at 5 seconds and NW 2 ft at 10 seconds. A chance of rain in the morning, then rain in the afternoon.

Wed Night

SW wind 10 to 15 kt, becoming NW 15 to 20 kt after midnight. Seas 3 to 5 ft. Wave detail: W 4 ft at 6 seconds. Rain.

Thu

NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: SW 2 ft at 8 seconds and W 6 ft at 10 seconds. A slight chance of rain in the morning.

Thu Night

NW wind 20 to 25 kt, becoming N 15 to 20 kt after midnight. Seas 7 to 10 ft. Wave detail: NW 9 ft at 10 seconds and SW 4 ft at 11 seconds.

Fri

N wind 5 to 10 kt. Seas 5 to 8 ft. Wave detail: NW 7 ft at 12 seconds and S 2 ft at 12 seconds.

Fri Night

NW wind 10 to 15 kt, becoming N around 5 kt after midnight. Seas 4 to 6 ft. Wave detail: NW 5 ft at 11 seconds and S 3 ft at 14 seconds.

Sat

NE wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: W 4 ft at 10 seconds and SW 3 ft at 15 seconds.

Sat Night

NW wind around 5 kt. Seas 3 to 4 ft. Wave detail: S 2 ft at 8 seconds and NW 3 ft at 10 seconds.

Sun

NE wind around 5 kt, backing to NW in the afternoon. Seas 3 to 4 ft. Wave detail: W 3 ft at 6 seconds and SW 2 ft at 15 seconds.

Sun Night

W wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 3 to 4 ft. Wave detail: W 3 ft at 10 seconds and SW 2 ft at 14 seconds.

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

in the deep water channel...mixed seas of 2 to 4 feet at 9 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 3.4 kt at 04:57 am wednesday and 2.2 kt at 05:16 pm wednesday.