Areas of Dangerous Heat and Heavy Rainfall Today

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley today. Heat Advisories remain in effect. Heavy to excessive rainfall today could bring areas of flooding to parts of the northern High Plains and Midwest into the Ohio Valley. Flood Watches remain in effect. Read More >

Last Update: 838 AM PDT Sun Sep 20 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 5 ft. Wave detail: NW 5 ft at 8 seconds.

Tonight

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds and SW 2 ft at 18 seconds.

Mon

W wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds and SW 2 ft at 17 seconds.

Mon Night

W wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 5 ft at 8 seconds and SW 2 ft at 17 seconds.

Tue

W wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: W 5 ft at 9 seconds and S 2 ft at 15 seconds.

Tue Night

NW wind 10 to 15 kt. Seas 4 to 6 ft, building to 5 to 8 ft after midnight. Wave detail: NW 7 ft at 10 seconds and S 2 ft at 16 seconds.

Wed

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

Wed Night

NW wind 5 to 10 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 10 seconds and S 2 ft at 15 seconds.

Thu

NW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave detail: NW 5 ft at 10 seconds and SW 2 ft at 14 seconds.

Thu Night

NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 9 seconds and S 2 ft at 13 seconds.

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

in the deep water channel...mixed seas of 3 to 5 ft at 8 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 1.0 kt at 01:05 pm sunday and 1.2 kt at 12:54 am monday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 5 ft at 8 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 1.0 kt at 01:05 PM Sunday and 1.2 kt at 12:54 AM Monday.