Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Last Update: 257 PM PDT Tue Mar 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: NW 3 ft at 7 seconds and SW 2 ft at 16 seconds.

Wed

N wind around 5 kt, backing to NW in the afternoon. Seas 3 to 4 ft. Wave detail: W 3 ft at 7 seconds and SW 2 ft at 15 seconds.

Wed Night

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

Thu

N wind around 5 kt, backing to NW in the afternoon. Seas 3 to 4 ft. Wave detail: W 3 ft at 8 seconds.

Thu 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.

Fri

NW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Seas 3 to 5 ft. Wave detail: W 4 ft at 8 seconds.

Fri Night

NW wind 10 to 15 kt. Seas 4 to 5 ft, building to 5 to 7 ft after midnight. Wave detail: NW 6 ft at 8 seconds.

Sat

NW wind 15 to 20 kt, rising to 20 to 25 kt in the afternoon. Seas 5 to 7 ft, building to 6 to 9 ft in the afternoon. Wave detail: NW 7 ft at 9 seconds and SW 2 ft at 15 seconds.

Sat Night

NW wind 20 to 25 kt. Seas 8 to 11 ft. Wave detail: NW 10 ft at 10 seconds and SW 2 ft at 15 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, easing to 10 to 15 kt after midnight. Seas 5 to 7 ft. Wave detail: NW 7 ft at 9 seconds.

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

in the deep water channel...mixed seas of 3 to 4 feet at 18 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 2.5 kt at 04:16 pm tuesday and 2.8 kt at 04:41 am wednesday.

.....SAN FRANCISCO BAR/FOURFATHOM BANK FORECAST..... IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 4 feet at 18 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 2.5 kt at 04:16 PM Tuesday and 2.8 kt at 04:41 AM Wednesday.