Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Last Update: 429 AM PDT Mon Aug 31 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Today

W wind 10 to 15 kt, easing to 5 to 10 kt this afternoon. Seas 3 to 5 ft. Wave detail: NW 5 ft at 8 seconds and SW 2 ft at 14 seconds.

Tonight

W wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 3 ft at 7 seconds and S 2 ft at 14 seconds.

Tue

SW wind around 5 kt. Seas around 3 ft. Wave detail: W 3 ft at 6 seconds and S 2 ft at 13 seconds.

Tue Night

SW wind around 5 kt. Seas around 3 ft. Wave detail: NW 2 ft at 7 seconds and S 2 ft at 13 seconds.

Wed

S wind 5 to 10 kt. Seas around 3 ft. Wave detail: NW 2 ft at 9 seconds and S 2 ft at 13 seconds.

Wed Night

W wind around 5 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 8 seconds and S 2 ft at 13 seconds. Patchy fog after midnight.

Thu

SW wind around 5 kt. Seas 3 to 4 ft. Wave detail: W 3 ft at 8 seconds and S 3 ft at 14 seconds. A chance of rain in the afternoon.

Thu Night

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

Fri

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 10 seconds and S 3 ft at 15 seconds.

Fri Night

NW wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 10 seconds and SW 3 ft at 15 seconds.

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

in the deep water channel...mixed seas of 3 to 5 ft at 8 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 2.4 kt at 07:02 am monday and 3.5 kt at 07:07 pm monday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 5 ft at 8 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 2.4 kt at 07:02 AM Monday and 3.5 kt at 07:07 PM Monday.