Severe Thunderstorms and Heavy Rain in the Mississippi Valley; Critical Fire Weather in the Southern Plains

Severe thunderstorms will persist tonight across the Middle Mississippi Valley, producing damaging winds, large to very large hail and several tornadoes. Low humidity and windy conditions will continue to produce elevated to critical fire weather conditions across the southern High Plains into midweek. Read More >

Last Update: 251 PM PDT Mon Apr 27 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

This Afternoon

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

Tonight

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

Tue

NW wind 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Seas 3 to 4 ft. Wave detail: NW 4 ft at 7 seconds.

Tue Night

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

Wed

NW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave detail: NW 5 ft at 9 seconds.

Wed Night

NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 9 seconds.

Thu

NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: NW 6 ft at 9 seconds.

Thu Night

NW wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Seas 5 to 8 ft. Wave detail: W 7 ft at 11 seconds.

Fri

NW wind 10 to 15 kt. Seas 5 to 7 ft. Wave detail: W 7 ft at 11 seconds.

Fri Night

NW wind 10 to 15 kt. Seas 5 to 8 ft, building to 7 to 10 ft after midnight. Wave detail: W 9 ft at 11 seconds.

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

in the deep water channel...mixed seas of 4 to 6 feet at 13 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 3.1 kt at 03:07 am tuesday and 2.0 kt at 03:09 pm tuesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 4 to 6 feet at 13 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 3.1 kt at 03:07 AM Tuesday and 2.0 kt at 03:09 PM Tuesday.