Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Last Update: 847 PM PST Sat Dec 27 2025

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Tonight

N wind 5 to 10 kt. Seas 5 to 7 ft. Wave detail: NW 5 ft at 10 seconds and S 3 ft at 14 seconds.

Sun

NE wind 5 to 10 kt, backing to N in the afternoon. Seas 3 to 5 ft. Wave detail: NW 4 ft at 9 seconds and S 2 ft at 12 seconds.

Sun Night

NE wind 5 to 10 kt, rising to 10 to 15 kt after midnight. Seas 3 to 4 ft. Wave detail: NW 4 ft at 10 seconds.

Mon

NE wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 9 seconds.

Mon Night

NE wind 5 to 10 kt. Seas around 3 ft. Wave detail: NW 3 ft at 10 seconds.

Tue

NE wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 13 seconds.

Tue Night

NE wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 14 seconds.

Wed

E wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 3 ft at 12 seconds. A chance of rain in the afternoon.

Wed Night

E wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 4 ft at 12 seconds. A chance of rain in the evening, then rain likely after midnight.

New Years Day

E wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: S 3 ft at 9 seconds and W 4 ft at 13 seconds. Rain likely.

Thu Night

S wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: S 3 ft at 8 seconds and W 3 ft at 12 seconds. Rain likely.

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

in the deep water channel...mixed seas of 9 to 12 feet at 9 seconds.

across the bar...mixed seas of 10 to 14 feet at 9 seconds. Maximum ebb current of 1.8 kt at 10:01 pm saturday and 2.6 kt at 10:58 am sunday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 9 to 12 feet at 9 seconds. ACROSS THE BAR...Mixed seas of 10 to 14 feet at 9 seconds. Maximum ebb current of 1.8 kt at 10:01 PM Saturday and 2.6 kt at 10:58 AM Sunday.