Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >

Last Update: 916 AM PST Tue Dec 30 2025

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

NE wind 10 to 15 kt. Seas around 3 ft. Wave detail: NW 3 ft at 12 seconds.

Tonight

NE wind 10 to 15 kt. Seas around 3 ft. Wave detail: NW 3 ft at 14 seconds. A chance of rain after midnight.

Wed

E wind 10 to 15 kt. Seas around 3 ft. Wave detail: W 3 ft at 12 seconds. A chance of rain in the morning, then rain in the afternoon.

Wed Night

E wind 10 to 15 kt. Seas 3 to 4 ft. Wave detail: S 2 ft at 6 seconds and W 4 ft at 12 seconds. Rain.

New Years Day

SE wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: S 4 ft at 7 seconds and W 4 ft at 12 seconds. Rain.

Thu Night

S wind 10 to 15 kt, rising to 20 to 25 kt with gusts up to 35 kt after midnight. Seas 4 to 6 ft. Wave detail: S 4 ft at 8 seconds and W 4 ft at 11 seconds. Patchy dense fog in the evening. Rain.

Fri

S wind 25 to 30 kt. Seas 5 to 7 ft, building to 7 to 10 ft in the afternoon. Wave detail: S 9 ft at 7 seconds and W 4 ft at 11 seconds. Rain.

Fri Night

SW wind 20 to 25 kt. Seas 7 to 10 ft. Wave detail: S 9 ft at 8 seconds and W 6 ft at 12 seconds. Rain.

Sat

S wind 15 to 20 kt, easing to 10 to 15 kt in the afternoon. Seas 8 to 11 ft. Wave detail: SW 8 ft at 9 seconds and W 10 ft at 13 seconds. Rain.

Sat Night

S wind around 10 kt. Seas 8 to 11 ft. Wave detail: S 2 ft at 7 seconds and W 10 ft at 13 seconds. Rain likely.

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

in the deep water channel...mixed seas of 2 to 3 feet at 12 seconds.

across the bar...mixed seas of 2 to 4 feet at 12 seconds. Maximum ebb current of 3.7 kt at 12:29 pm tuesday and 1.2 kt at 01:12 am wednesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 3 feet at 12 seconds. ACROSS THE BAR...Mixed seas of 2 to 4 feet at 12 seconds. Maximum ebb current of 3.7 kt at 12:29 PM Tuesday and 1.2 kt at 01:12 AM Wednesday.