Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Hazardous Weather Conditions

Small Craft Advisory until April 12, 03:00 PM PDT

Last Update: 238 AM PDT Sun Apr 12 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 20 to 25 kt, becoming W 10 to 15 kt. Seas 7 to 10 ft. Wave detail: W 9 ft at 10 seconds. A chance of tstms until late afternoon. Showers likely.

Tonight

W wind 10 to 15 kt, becoming NW around 5 kt after midnight. Seas 7 to 9 ft, subsiding to 5 to 7 ft after midnight. Wave detail: W 8 ft at 10 seconds and SW 2 ft at 15 seconds. A slight chance of showers.

Mon

NW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave detail: W 6 ft at 10 seconds and SW 2 ft at 15 seconds.

Mon Night

NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 9 seconds and SW 2 ft at 15 seconds.

Tue

NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: NW 6 ft at 8 seconds and SW 2 ft at 14 seconds.

Tue Night

NW wind 15 to 20 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 8 seconds and SW 2 ft at 14 seconds.

Wed

NW wind 15 to 20 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 8 seconds.

Wed Night

NW wind 15 to 20 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 7 seconds.

Thu

NW wind 20 to 25 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 7 seconds.

Thu Night

NW wind 20 to 25 kt, easing to 15 to 20 kt after midnight. Seas 5 to 7 ft. Wave detail: NW 7 ft at 10 seconds.

winds and seas higher in and near tstms.

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

in the deep water channel...mixed seas of 6 to 8 feet at 6 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 1.7 kt at 01:34 pm sunday and 1.9 kt at 02:21 am monday.

Winds and seas higher in and near tstms. .....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 6 to 8 feet at 6 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 1.7 kt at 01:34 PM Sunday and 1.9 kt at 02:21 AM Monday.