FZPN23 KWNM 201751 OFFN08 NAVTEX Marine Forecast for northern California waters NWS Ocean Prediction Center Washington DC 1051 AM PDT Sat Jun 20 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 trough will develop along the N California coast tonight into Sun, persist Sun night, then weaken Mon and persist through Wed night. High pressure will remain well W of the area today through Wed night. Point Saint George to Point Arena .TODAY...N winds 5 to 15 kt. Seas 6 to 9 ft. .TONIGHT...N winds 20 to 30 kt. Seas 6 to 10 ft. .SUN...N winds 20 to 30 kt. Seas 8 to 11 ft. .SUN NIGHT...N winds 20 to 30 kt. Seas 7 to 10 ft. .MON...N winds 20 to 30 kt. Seas 7 to 11 ft. .MON NIGHT...N winds 15 to 25 kt. Seas 6 to 10 ft. .TUE...N winds 15 to 25 kt. Seas 6 to 9 ft. .TUE NIGHT...N winds 15 to 25 kt. Seas 6 to 9 ft. .WED...N winds 20 to 30 kt. Seas 6 to 11 ft. .WED NIGHT...N winds 20 to 30 kt. Seas 8 to 12 ft. Point Arena to Point Piedras Blancas .TODAY...N winds 10 to 20 kt. Seas 6 to 9 ft. .TONIGHT...N winds 15 to 25 kt. Seas 5 to 9 ft. .SUN...N winds 20 to 30 kt. Seas 6 to 11 ft. .SUN NIGHT...N to NW winds 20 to 30 kt. Seas 6 to 10 ft. .MON...NW winds 15 to 25 kt. Seas 6 to 10 ft. .MON NIGHT...N to NW winds 10 to 20 kt. Seas 5 to 8 ft. .TUE...N winds 10 to 20 kt. Seas 5 to 8 ft. .TUE NIGHT...N winds 10 to 20 kt. Seas 5 to 8 ft. .WED...N winds 10 to 20 kt. Seas 6 to 10 ft. .WED NIGHT...N winds 15 to 25 kt. Seas 6 to 11 ft.