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 >

Hazardous Weather Conditions

Small Craft Advisory in effect from April 20, 03:00 AM PDT until April 20, 09:00 PM PDT

Last Update: 855 AM PDT Sun Apr 19 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

SW wind around 5 kt, rising to 5 to 10 kt this afternoon. Seas around 2 ft or less. Wave detail: W 2 ft at 6 seconds.

Tonight

S wind 10 to 15 kt, rising to 15 to 20 kt after midnight. Seas around 3 ft, building to 4 to 5 ft after midnight. Wave detail: S 3 ft at 5 seconds and W 4 ft at 9 seconds. A chance of rain after midnight.

Mon

S wind 20 to 25 kt. Seas 5 to 7 ft. Wave detail: S 6 ft at 6 seconds and W 4 ft at 8 seconds. Rain.

Mon Night

SW wind 15 to 20 kt, becoming S around 5 kt after midnight. Seas 5 to 7 ft. Wave detail: S 5 ft at 7 seconds and W 6 ft at 12 seconds. Rain.

Tue

S wind 10 to 15 kt. Seas 5 to 6 ft. Wave detail: S 2 ft at 6 seconds and W 6 ft at 12 seconds. Rain in the morning, then showers with a slight chance of tstms in the afternoon.

Tue Night

W wind 10 to 15 kt. Seas 5 to 6 ft. Wave detail: SW 4 ft at 6 seconds and W 5 ft at 11 seconds. Rain likely, mainly in the evening.

Wed

W wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: SW 5 ft at 8 seconds and S 3 ft at 13 seconds. A chance of rain in the morning.

Wed Night

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

Thu

NW wind 10 to 15 kt, rising to 15 to 20 kt in the afternoon. Seas 4 to 5 ft. Wave detail: W 5 ft at 7 seconds and S 3 ft at 13 seconds.

Thu Night

NW wind 15 to 20 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 7 seconds and SW 2 ft at 15 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 1.4 kt at 06:53 pm sunday and 4.8 kt at 06:21 am monday.