Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Last Update: 819 PM PDT Mon Aug 17 2026

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San Francisco Bay Area/Monterey, CA Local Forecast Office

12NM SW San Francisco CA

Marine Zone Forecast

Tonight

NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: W 3 ft at 8 seconds and SW 2 ft at 14 seconds. Patchy dense fog late this evening and overnight.

Tue

NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 8 seconds and SW 2 ft at 14 seconds. Patchy dense fog in the morning.

Tue Night

NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds and SW 2 ft at 14 seconds. Patchy dense fog in the evening.

Wed

NW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds and SW 2 ft at 15 seconds.

Wed Night

NW wind 10 to 15 kt. Seas 5 to 7 ft. Wave detail: NW 5 ft at 8 seconds and SW 2 ft at 15 seconds.

Thu

NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 5 ft at 8 seconds.

Thu Night

NW wind 10 to 15 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 8 seconds.

Fri

NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds.

Fri Night

NW wind 10 to 15 kt, rising to 15 to 20 kt after midnight. Seas 3 to 5 ft. Wave detail: NW 4 ft at 7 seconds.

Sat

NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds.

Sat Night

NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 5 ft at 8 seconds.

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

in the deep water channel...mixed seas of 2 to 4 ft at 15 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 2.7 kt at 08:52 pm monday and 1.6 kt at 09:32 am tuesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 4 ft at 15 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 2.7 kt at 08:52 PM Monday and 1.6 kt at 09:32 AM Tuesday.