Wildfire Smoke and Severe Thunderstorms in the East; Monsoon Thunderstorms in the Southwest

Wildfire smoke continues to impact air quality from the Great Lakes region into New England and the Mid-Atlantic today with widespread Air Quality Alerts in effect. Severe thunderstorms are expected across portions of the Ohio Valley and Lower Great Lakes into the Mid-Atlantic and Northeast, this afternoon into the evening. Monsoonal thunderstorms may bring areas of flooding to the Southwest. Read More >

Last Update: 946 AM PDT Sat Jul 18 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 5 to 10 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 8 seconds. Patchy dense fog early this morning.

Tonight

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: W 4 ft at 8 seconds.

Sun

W wind around 5 kt. Seas 3 to 5 ft. Wave detail: W 4 ft at 8 seconds and SW 2 ft at 16 seconds.

Sun Night

W wind around 5 kt. Seas 3 to 4 ft. Wave detail: NW 3 ft at 8 seconds and SW 2 ft at 15 seconds. Patchy dense fog after midnight.

Mon

SW wind around 5 kt. Seas 3 to 5 ft. Wave detail: NW 3 ft at 8 seconds and S 3 ft at 14 seconds.

Mon Night

W wind around 5 kt. Seas 3 to 5 ft. Wave detail: NW 3 ft at 8 seconds and S 3 ft at 13 seconds.

Tue

NW wind around 5 kt. Seas 3 to 4 ft. Wave detail: NW 2 ft at 8 seconds and S 3 ft at 12 seconds.

Tue Night

W wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 2 ft at 8 seconds and S 3 ft at 12 seconds.

Wed

W wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: NW 2 ft at 8 seconds and S 3 ft at 11 seconds.

Wed Night

NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: NW 2 ft at 8 seconds and S 3 ft at 10 seconds.

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

in the deep water channel...mixed seas of 3 to 5 ft at 7 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 2.2 kt at 08:55 pm saturday and 2.6 kt at 08:58 am sunday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 5 ft at 7 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 2.2 kt at 08:55 PM Saturday and 2.6 kt at 08:58 AM Sunday.