Severe Thunderstorms Tonight in the Mid-Atlantic; Tropical Storm Bertha in the Gulf

Scattered thunderstorms with severe gusts, hail and a tornado risk are possible near a cold front from the Ohio Valley to the Mid-Atlantic tonight. Tropical Storm Bertha is expected to bring tropical storm conditions to portions of the Gulf Coast from the panhandle of Florida into Louisiana through Wednesday. Read More >

Last Update: 940 PM PDT Tue Jul 21 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Tonight

SE wind 10 to 20 kt, with evening gusts up to 25 kt. seas 3 to 5 ft. Wave detail: NW 3 ft at 9 seconds and S 4 ft at 11 seconds.

Wed

S wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: NW 2 ft at 8 seconds and S 5 ft at 10 seconds.

Wed Night

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

Thu

NW wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: N 3 ft at 6 seconds and SW 3 ft at 8 seconds.

Thu Night

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

Fri

NW wind 10 to 15 kt. Seas around 4 ft. Wave detail: NW 4 ft at 7 seconds and S 2 ft at 13 seconds.

Fri Night

NW wind 15 to 20 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 8 seconds and S 2 ft at 13 seconds.

Sat

NW wind 15 to 20 kt. Seas 4 to 5 ft. Wave detail: NW 5 ft at 7 seconds and S 2 ft at 13 seconds.

Sat Night

NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 8 seconds and S 2 ft at 12 seconds.

Sun

NW wind 10 to 15 kt, rising to 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Wave detail: NW 5 ft at 8 seconds and SW 2 ft at 12 seconds.

Sun Night

NW wind 15 to 20 kt. Seas 5 to 8 ft. Wave detail: NW 7 ft at 9 seconds and S 3 ft at 13 seconds.

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

in the deep water channel...mixed seas of 3 to 5 ft 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 2.3 kt at 11:35 pm tuesday and 1.1 kt at 11:54 am wednesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 5 ft 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 2.3 kt at 11:35 PM Tuesday and 1.1 kt at 11:54 AM Wednesday.