Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Last Update: 201 AM PDT Sat Apr 18 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 around 5 kt, rising to 5 to 10 kt late. Seas 3 to 4 ft. Wave detail: NW 4 ft at 8 seconds.

Tonight

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 3 to 4 ft. Wave detail: SW 3 ft at 9 seconds and W 2 ft at 9 seconds. A slight chance of showers in the evening, then a chance of showers after midnight.

Mon

S wind 15 to 20 kt. Seas 4 to 5 ft, building to 5 to 7 ft in the afternoon. Wave detail: S 7 ft at 7 seconds. A chance of showers in the morning, then showers likely in the afternoon.

Mon Night

S wind 10 to 15 kt. Seas 5 to 8 ft. Wave detail: S 7 ft at 10 seconds and W 2 ft at 12 seconds. Showers.

Tue

S wind 10 to 15 kt, rising to 15 to 20 kt in the afternoon. Seas 4 to 6 ft. Wave detail: SW 6 ft at 11 seconds. Showers in the morning, then showers likely with a chance of tstms in the afternoon.

Tue Night

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

Wed

NW wind 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Seas 4 to 6 ft. Wave detail: W 5 ft at 9 seconds and SW 2 ft at 14 seconds. A chance of rain in the morning.

Wed Night

NW wind 10 to 15 kt. Seas 4 to 5 ft. Wave detail: W 5 ft at 9 seconds and SW 2 ft at 16 seconds.

winds and seas higher in and near tstms.

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

in the deep water channel...mixed seas of 2 to 4 feet at 15 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 4.6 kt at 05:07 am saturday and 1.6 kt at 06:04 pm saturday.

Winds and seas higher in and near tstms. .....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 4 feet at 15 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 4.6 kt at 05:07 AM Saturday and 1.6 kt at 06:04 PM Saturday.