Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest
Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >
Last Update: 809 AM PDT Wed Aug 19 2026
For More Weather Information:
12NM SW San Francisco CA
Marine Zone Forecast
Today
NW wind around 5 kt, rising to 5 to 10 kt this afternoon. Seas 3 to 5 ft. Wave detail: W 4 ft at 8 seconds. Patchy dense fog early this morning.
Tonight
NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Seas 4 to 6 ft. Wave detail: W 5 ft at 8 seconds.
Thu
NW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Seas 4 to 6 ft. Wave detail: W 5 ft at 8 seconds.
Thu Night
NW wind 10 to 15 kt. Seas 4 to 5 ft. Wave detail: NW 5 ft at 7 seconds.
Fri
NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 7 seconds.
Fri Night
NW wind 10 to 15 kt. 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 7 seconds.
Sat Night
NW wind 10 to 15 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 7 seconds.
Sun
NW wind 5 to 10 kt. Seas 3 to 5 ft. Wave detail: NW 4 ft at 8 seconds.
Sun Night
W wind 5 to 10 kt. Seas 3 to 4 ft. Wave detail: NW 4 ft at 8 seconds.
.....san francisco bar/fourfathom bank forecast.....
in the deep water channel...mixed seas of 2 to 4 ft at 14 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 1.1 kt at 10:29 am wednesday and 2.1 kt at 10:17 pm wednesday.
.....san francisco bar/fourfathom bank forecast.....
in the deep water channel...mixed seas of 2 to 4 ft at 14 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 1.1 kt at 10:29 am wednesday and 2.1 kt at 10:17 pm wednesday.
.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 2 to 4 ft at 14 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 1.1 kt at 10:29 AM Wednesday and 2.1 kt at 10:17 PM Wednesday.
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