Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Northern Plains and Upper Midwest
Dangerous heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms will produce damaging winds and heavy rainfall over portions of the northern/central Plains into the mid/upper-Mississippi Valleys today. Read More >
Hazardous Weather Conditions
Last Update: 906 AM PDT Thu Jul 30 2026
For More Weather Information:
12NM SW San Francisco CA
Marine Zone Forecast
Today
NW wind 10 to 15 kt, rising to 15 to 20 kt this afternoon. Seas 5 to 7 ft. Wave detail: NW 7 ft at 9 seconds and S 2 ft at 15 seconds.
Tonight
NW wind 15 to 20 kt. Seas 6 to 9 ft. Wave detail: NW 7 ft at 9 seconds and S 2 ft at 15 seconds.
Fri
NW wind 10 to 15 kt, rising to 15 to 20 kt in the afternoon. Seas 5 to 7 ft. Wave detail: NW 6 ft at 8 seconds and S 2 ft at 14 seconds.
Fri Night
NW wind 15 to 20 kt. Seas 6 to 9 ft. Wave detail: NW 7 ft at 9 seconds and S 2 ft at 14 seconds.
Sat
NW wind 15 to 20 kt. Seas 5 to 8 ft. Wave detail: NW 7 ft at 9 seconds and S 2 ft at 13 seconds.
Sat Night
NW wind 20 to 25 kt. Gusts up to 35 kt in the evening. Seas 7 to 10 ft. Wave detail: NW 9 ft at 10 seconds.
Sun
NW wind 15 to 20 kt. Seas 6 to 9 ft. Wave detail: NW 9 ft at 10 seconds.
Sun Night
NW wind 15 to 20 kt. Seas 7 to 10 ft. Wave detail: NW 9 ft at 11 seconds.
Mon
NW wind 10 to 15 kt, becoming W 5 to 10 kt in the afternoon. Seas 6 to 9 ft. Wave detail: NW 8 ft at 10 seconds.
Mon Night
W wind 5 to 10 kt. Seas 5 to 7 ft. Wave detail: NW 7 ft at 10 seconds.
.....san francisco bar/fourfathom bank forecast.....
in the deep water channel...mixed seas of 4 to 6 ft at 17 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 1.6 kt at 06:18 pm thursday and 3.0 kt at 06:12 am friday.
.....san francisco bar/fourfathom bank forecast.....
in the deep water channel...mixed seas of 4 to 6 ft at 17 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 1.6 kt at 06:18 pm thursday and 3.0 kt at 06:12 am friday.
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