Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Last Update: 847 AM PDT Fri Apr 17 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

N wind 5 to 10 kt, backing to NW early this afternoon, rising to 10 to 15 kt late. Seas 4 to 6 ft. Wave detail: NW 5 ft at 10 seconds.

Tonight

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 9 seconds.

Sat

N wind 5 to 10 kt, becoming NW in the afternoon. Seas 3 to 4 ft. Wave detail: NW 4 ft at 8 seconds.

Sat Night

NW wind 5 to 10 kt, easing to around 5 kt after midnight. Seas around 3 ft. Wave detail: NW 2 ft at 7 seconds.

Sun

W wind around 5 kt, backing to SW in the afternoon. Seas around 2 ft or less. Wave detail: NW 2 ft at 6 seconds.

Sun Night

S wind 10 to 15 kt. Seas around 2 ft or less, then 3 to 4 ft after midnight. Wave detail: W 3 ft at 8 seconds and SW 2 ft at 14 seconds. A chance of rain in the evening, then rain likely after midnight.

Mon

S wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: S 6 ft at 7 seconds. Rain likely.

Mon Night

S wind 5 to 10 kt. Seas 6 to 8 ft. Wave detail: W 7 ft at 11 seconds and SW 7 ft at 12 seconds. A chance of rain in the evening, then rain likely after midnight.

Tue

S wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas 5 to 7 ft. Wave detail: W 6 ft at 11 seconds and SW 2 ft at 13 seconds. Rain likely in the morning, then showers likely in the afternoon.

Tue Night

W wind 10 to 15 kt. Seas 5 to 6 ft. Wave detail: W 5 ft at 9 seconds and SW 5 ft at 10 seconds. A chance of rain.

.....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 1.8 kt at 05:15 pm friday and 4.6 kt at 05:07 am saturday.

.....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 1.8 kt at 05:15 PM Friday and 4.6 kt at 05:07 AM Saturday.