FZPN23 KWNM 280455 OFFN08 NAVTEX Marine Forecast for northern California waters NWS Ocean Prediction Center Washington DC 955 PM PDT Thu Aug 27 2026 Conditions given represent the highest within that period. ...Please refer to Coastal Waters Forecasts (CWF) available through NOAA Weather Radio and other means for detailed coastal waters forecasts... .SYNOPSIS...A low pressure trough will persist along the coast tonight through Fri night, then slowly strengthen Sat and Sat night. A high pressure ridge will build E across the region this afternoon, and persist through Tue night. A cold front will reach the NW waters late Tue night. Point Saint George to Point Arena .TONIGHT...N to NW winds 15 to 25 kt. Seas 7 to 10 ft. .FRI...N to NW winds 20 to 30 kt. Seas 7 to 10 ft. .FRI NIGHT...N winds 20 to 30 kt. Seas 8 to 11 ft. .SAT...N to NW winds 20 to 30 kt. Seas 7 to 10 ft. .SAT NIGHT...N winds 20 to 30 kt. Seas 7 to 11 ft. .SUN...N winds 20 to 30 kt. Seas 8 to 12 ft. .SUN NIGHT...N winds 20 to 30 kt. Seas 7 to 10 ft. .MON...NW winds 10 to 20 kt. Seas 5 to 9 ft. .MON NIGHT...W to NW winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...NW winds 5 to 15 kt. Seas 4 to 7 ft. .TUE NIGHT...W to NW winds 5 to 15 kt. Seas 4 to 7 ft. Point Arena to Point Piedras Blancas .TONIGHT...N winds 10 to 20 kt. Seas 5 to 9 ft. .FRI...N to NW winds 10 to 20 kt. Seas 5 to 8 ft. .FRI NIGHT...N to NW winds 15 to 25 kt. Seas 6 to 10 ft. .SAT...N to NW winds 15 to 25 kt. Seas 6 to 10 ft. .SAT NIGHT...N to NW winds 20 to 30 kt. Seas 6 to 10 ft. .SUN...N to NW winds 20 to 30 kt. Seas 6 to 10 ft. .SUN NIGHT...N to NW winds 15 to 25 kt. Seas 6 to 10 ft. .MON...NW winds 15 to 25 kt. Seas 4 to 8 ft. .MON NIGHT...NW winds 5 to 15 kt. Seas 4 to 7 ft. .TUE...W to NW winds 5 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...NW winds 5 to 15 kt. Seas 4 to 6 ft.