Significant Severe Weather in the Upper Midwest; Blizzard Conditions in the Cascades; Heavy Rain and Thunderstorms in Hawaii

Significant severe thunderstorms, including the risk for strong to intense tornadoes, are expected across the Upper Midwest this afternoon and evening. An atmospheric river will bring blizzard conditions to the northern Cascades. A powerful Kona storm is expected to impact Hawaii today into Saturday, bringing heavy rainfall and strong winds. Read More >

Hazardous Weather Conditions

Small Craft Advisory until March 11, 03:00 AM PDT

Last Update: 110 PM PDT Tue Mar 10 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Tonight

NW wind 25 to 30 kt, easing to 15 to 20 kt. Seas 8 to 11 ft, subsiding to 6 to 9 ft after midnight. Wave detail: NW 10 ft at 10 seconds.

Wed

NW wind 10 to 15 kt. Seas 5 to 8 ft, subsiding to 4 to 6 ft in the afternoon. Wave detail: NW 7 ft at 10 seconds.

Wed Night

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

Thu

NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 8 seconds.

Thu Night

NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 8 seconds and SW 2 ft at 18 seconds.

Fri

NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 8 seconds.

Fri Night

NW wind 20 to 25 kt. Seas 5 to 8 ft. Wave detail: NW 7 ft at 9 seconds.

Sat

NW wind 20 to 25 kt, easing to 15 to 20 kt in the afternoon. Seas 5 to 7 ft. Wave detail: NW 7 ft at 9 seconds.

Sat Night

NW wind 20 to 25 kt, easing to 15 to 20 kt after midnight. Seas 5 to 7 ft. Wave detail: NW 6 ft at 9 seconds.

Sun

NW wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave detail: NW 6 ft at 9 seconds.

Sun 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 8 seconds.

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

in the deep water channel...mixed seas of 6 to 8 feet at 11 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 0.7 kt at 11:25 pm tuesday and 1.6 kt at 10:05 am wednesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 6 to 8 feet at 11 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 0.7 kt at 11:25 PM Tuesday and 1.6 kt at 10:05 AM Wednesday.