Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Last Update: 843 AM PST Wed Jan 21 2026

View Nearby Observations

For More Weather Information:

San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

E wind around 5 kt, veering to S this afternoon. Seas 3 to 5 ft. Wave detail: W 5 ft at 14 seconds. A slight chance of rain late.

Tonight

S wind around 5 kt. Seas 3 to 4 ft. Wave detail: W 4 ft at 13 seconds. A slight chance of rain in the evening.

Thu

NW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Seas 3 to 4 ft. Wave detail: W 4 ft at 12 seconds.

Thu Night

NW wind 5 to 10 kt, easing to around 5 kt after midnight. Seas 3 to 5 ft. Wave detail: W 5 ft at 8 seconds.

Fri

N wind around 5 kt. Seas 4 to 6 ft. Wave detail: W 5 ft at 9 seconds.

Fri Night

N wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 11 seconds.

Sat

NE wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: W 5 ft at 11 seconds.

Sat Night

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

Sun

E wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 3 ft at 13 seconds.

Sun Night

E wind around 5 kt. Seas around 3 ft. Wave detail: W 3 ft at 12 seconds.

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

in the deep water channel...mixed seas of 3 to 4 feet at 14 seconds.

across the bar...mixed seas of 4 to 5 feet at 14 seconds. Maximum ebb current of 3.2 kt at 05:52 pm wednesday and 2.0 kt at 06:41 am thursday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 4 feet at 14 seconds. ACROSS THE BAR...Mixed seas of 4 to 5 feet at 14 seconds. Maximum ebb current of 3.2 kt at 05:52 PM Wednesday and 2.0 kt at 06:41 AM Thursday.