Severe Thunderstorms in Portions of the Mississippi Valley and Great Lakes

A few severe thunderstorms with large hail, are expected across parts of the middle and upper Mississippi River Valley tonight through early morning. Snow and a wintry mix overnight in the Upper Midwest into the Great Lakes can cause hazardous travel conditions. Fire weather concerns continue for a large portion of the central and southern High Plains and Four Corners region this evening. Read More >

Last Update: 905 PM PDT Mon Mar 30 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Tonight

W wind 5 to 10 kt, backing to SW late this evening and overnight. Seas around 3 ft. Wave detail: W 3 ft at 8 seconds. A chance of rain late.

Tue

S wind 5 to 10 kt. Seas around 3 ft. Wave detail: NW 3 ft at 8 seconds. A chance of rain.

Tue Night

S wind 5 to 10 kt. Seas around 3 ft. Wave detail: NW 3 ft at 10 seconds and S 2 ft at 11 seconds. A chance of rain.

Wed

S wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas around 3 ft. Wave detail: NW 2 ft at 8 seconds and S 2 ft at 10 seconds. A chance of rain in the morning, then rain likely in the afternoon.

Wed Night

SW wind 10 to 15 kt, veering to W after midnight. Seas 3 to 5 ft. Wave detail: W 3 ft at 8 seconds and SW 3 ft at 8 seconds. Rain.

Thu

NW wind 15 to 20 kt. Seas 4 to 6 ft. Wave detail: W 5 ft at 6 seconds and S 2 ft at 10 seconds. A chance of rain in the morning.

Thu Night

NW wind 20 to 25 kt. Seas 6 to 9 ft. Wave detail: W 8 ft at 9 seconds.

Fri

N wind 10 to 15 kt. Seas 5 to 7 ft. Wave detail: W 7 ft at 11 seconds and S 2 ft at 13 seconds.

Fri Night

NW wind 10 to 15 kt, becoming N 5 to 10 kt after midnight. Seas 4 to 6 ft. Wave detail: NW 5 ft at 11 seconds and S 2 ft at 16 seconds.

Sat

NE wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: SW 3 ft at 8 seconds and NW 4 ft at 10 seconds.

Sat Night

NW wind 5 to 10 kt, becoming N after midnight. Seas 3 to 4 ft. Wave detail: NW 4 ft at 10 seconds.

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

in the deep water channel...mixed seas of 2 to 4 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 04:12 am tuesday and 2.4 kt at 04:28 pm tuesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 4 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 04:12 AM Tuesday and 2.4 kt at 04:28 PM Tuesday.