Areas of Severe Thunderstorms and Heat

Scattered severe thunderstorms and excessive rainfall are possible today in the Mid Atlantic, posing a risk for damaging winds and isolated flash flooding. Extreme Heat Warnings are in effect today for northeast Texas into southern Oklahoma and Arkansas. Extreme Heat Warnings are also in effect for the Desert Southwest today into Sunday. Read More >

Last Update: 244 AM PDT Thu Aug 20 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

NW wind 5 to 10 kt, rising to 10 to 15 kt late. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds.

Tonight

NW wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 6 seconds.

Fri

NW wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 7 seconds.

Fri Night

NW wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 6 seconds and SW 2 ft at 12 seconds.

Sat

NW wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 6 seconds.

Sat Night

NW wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave detail: NW 5 ft at 7 seconds.

Sun

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

Sun Night

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

Mon

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

Mon Night

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

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

in the deep water channel...mixed seas of 2 to 4 ft at 12 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 0.8 kt at 11:30 am thursday and 1.8 kt at 11:11 pm thursday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 4 ft at 12 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 0.8 kt at 11:30 AM Thursday and 1.8 kt at 11:11 PM Thursday.