Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East
Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >
Last Update: 845 AM PDT Tue May 19 2026
For More Weather Information:
12NM SW San Francisco CA
Marine Zone Forecast
Today
NW wind 5 to 10 kt, easing to around 5 kt late this morning, rising to 5 to 10 kt early this afternoon, rising to 10 to 15 kt late. Seas 5 to 8 ft. Wave detail: NW 8 ft at 10 seconds.
Tonight
NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Seas 5 to 7 ft. Wave detail: NW 6 ft at 10 seconds.
Wed
W wind 5 to 10 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 10 seconds.
Wed Night
NW wind 5 to 10 kt. Seas 5 to 7 ft, building to 6 to 9 ft after midnight. Wave detail: NW 8 ft at 11 seconds and SW 2 ft at 13 seconds. Patchy fog after midnight.
Thu
NW wind around 5 kt, backing to W in the afternoon. Seas 5 to 8 ft. Wave detail: NW 8 ft at 11 seconds.
Thu Night
W wind 5 to 10 kt, becoming SW after midnight. Seas 5 to 7 ft. Wave detail: NW 6 ft at 10 seconds and S 2 ft at 15 seconds.
Fri
S wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: NW 6 ft at 10 seconds and S 2 ft at 14 seconds.
Fri Night
SW wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 10 seconds and S 2 ft at 13 seconds.
Sat
SW wind 5 to 10 kt. Seas 5 to 7 ft. Wave detail: NW 6 ft at 9 seconds and S 2 ft at 15 seconds.
Sat Night
W wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: NW 5 ft at 9 seconds and S 2 ft at 15 seconds.
.....san francisco bar/fourfathom bank forecast.....
in the deep water channel...mixed seas of 3 to 5 feet at 11 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 1.2 kt at 07:41 pm tuesday and 4.1 kt at 06:50 am wednesday.
.....san francisco bar/fourfathom bank forecast.....
in the deep water channel...mixed seas of 3 to 5 feet at 11 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 1.2 kt at 07:41 pm tuesday and 4.1 kt at 06:50 am wednesday.
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