


Offshore Forecast
Issued by NWS
Issued by NWS
880 FZPN36 KWBC 181529 OFFN36 Marine Weather HF Voice Broadcast NWS Ocean Prediction Center Washington DC 829 AM PDT Sat Oct 18 2025 California waters- Inner waters from 60 nm to 150 nm offshore. Outer waters from 150 nm to 250 nm offshore. Conditions given represent the highest within that period. Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. .SYNOPSIS FOR CALIFORNIA WATERS...A trough along the California coast will persist today. A weak high pressure ridge will build S into the outer northern waters today, followed by a cold front moving SE across the northern waters tonight through Sun. The front will then move SW away from the central waters Sun night, as ridging returns to the outer northern waters, and the coastal trough rebuilds along the northern and central California coast. The coastal trough will persist through Mon night then gradually weaken Tue through Wed. It will dissipate Wed night as a cold front moves SE into the northern waters. Point St. George to Point Arena .TODAY...N winds 10 to 20 kt. Seas 10 to 14 ft. .TONIGHT...W to NW winds 15 to 25 kt. Seas 8 to 12 ft. .SUN...N to NW winds 15 to 25 kt. Seas building to 11 to 18 ft. .SUN NIGHT...N winds 20 to 30 kt. Seas 11 to 18 ft. .MON...N winds 20 to 30 kt. Seas 10 to 17 ft. .MON NIGHT...N winds 20 to 30 kt. Seas becoming 8 to 13 ft. .TUE...N winds 15 to 25 kt. Seas 9 to 16 ft. .TUE NIGHT...N winds 10 to 20 kt. Seas 12 to 17 ft. .WED...W to NW winds 10 to 20 kt. Seas 9 to 14 ft. .WED NIGHT...S to SW winds 15 to 25 kt. Seas 7 to 12 ft. Point Arena to Santa Cruz Island, CA .TODAY...N winds 10 to 20 kt. Seas 7 to 12 ft. .TONIGHT...N winds 10 to 20 kt. Seas 7 to 12 ft. .SUN...N winds 15 to 25 kt. Seas 7 to 10 ft. .SUN NIGHT...N winds 20 to 30 kt. Seas building to 11 to 17 ft. .MON...N winds 20 to 30 kt. Seas 11 to 17 ft. .MON NIGHT...N winds 15 to 25 kt. Seas becoming 9 to 13 ft. .TUE...N winds 15 to 25 kt. Seas 8 to 13 ft. .TUE NIGHT...N to NW winds 10 to 20 kt. Seas 8 to 14 ft. .WED...NW winds 5 to 15 kt. Seas 8 to 12 ft. .WED NIGHT...N to NW winds 5 to 15 kt. Seas 6 to 10 ft. Santa Cruz Island, CA to San Clemente Island, CA...south to Guadalupe Island .TODAY...N to NW winds less than 10 kt. Seas 6 to 10 ft. .TONIGHT...N to NW winds less than 10 kt. Seas 6 to 10 ft. .SUN...N to NW winds less than 10 kt. Seas 5 to 9 ft. .SUN NIGHT...N to NW winds 5 to 15 kt. Seas 5 to 8 ft. .MON...N to NW winds 5 to 15 kt. Seas becoming 7 to 11 ft. .MON NIGHT...NW winds less than 10 kt. Seas 7 to 11 ft. .TUE...W winds 5 to 10 kt. Seas 6 to 10 ft. .TUE NIGHT...W winds 5 to 15 kt. Seas 5 to 9 ft. .WED...W to NW winds 5 to 15 kt. Seas 6 to 10 ft. .WED NIGHT...NW winds 10 to 20 kt. Seas 6 to 10 ft. .Forecaster Mills. Ocean Prediction Center.