


Offshore Forecast
Issued by NWS
Issued by NWS
084 FZNT23 KWNM 220320 OFFN01 NAVTEX Marine Forecast for NE US waters NWS Ocean Prediction Center Washington DC 1120 PM EDT Thu Aug 21 2025 Conditions given represent the highest within that period. Locally higher winds and seas can be expected in and near tstms. ...Please refer to Coastal Waters Forecasts (CWF) available through NOAA Weather Radio and other means for detailed coastal waters forecasts... .SYNOPSIS...The center of Hurricane Erin will track NE along outer Mid-Atlantic waters late tonight into early Fri. Erin will then move farther away from the area over the N Atlantic late Fri into Sat night. Long period S swell from Hurricane Erin will continue tonight before backing to the SE and E by later Fri and Fri night. A high pressure ridge will move E across the waters Fri night and Sat, then shift E of the area Sat night into Sun. A cold front will gradually approach the waters from the W late Sun night, then move E across the area Mon and Mon night as developing low pressure tracks NE along the front. Another cold front will move over the region Tue and Tue night. For more information on Hurricane Erin, please closely monitor the latest forecasts from the National Hurricane Center. Eastport Maine to Cape Cod .TONIGHT...NE winds 20 to 30 kt. Seas 11 to 19 ft. Chance of showers. .FRI...N winds 20 to 30 kt. Seas 16 to 23 ft. .FRI NIGHT...Variable winds 10 to 20 kt. Seas 11 to 18 ft. .SAT...S winds 10 to 20 kt. Seas 6 to 11 ft. .SAT NIGHT...S winds 10 to 20 kt. Seas 5 to 8 ft. .SUN...S winds 10 to 20 kt. Seas 4 to 7 ft. .SUN NIGHT...S winds 10 to 20 kt. Seas 3 to 5 ft. .MON...S to SE winds 5 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...W to SW winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...SW winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...W winds 10 to 20 kt. Seas 4 to 6 ft. Cape Cod to Nantucket Shoals and Georges Bank ...TROPICAL STORM WARNING... .TONIGHT...E to NE winds 45 to 60 kt, becoming N to NE. Seas 27 to 42 ft. Showers and tstms. .FRI...N winds 35 to 45 kt. Seas 25 to 40 ft. Tstms and chance of showers. .FRI NIGHT...N winds 20 to 30 kt. Seas 16 to 27 ft. Chance of showers. .SAT...E to NE winds 10 to 20 kt. Seas 8 to 14 ft. .SAT NIGHT...S to SE winds 5 to 15 kt. Seas 6 to 10 ft. .SUN...S winds 5 to 15 kt. Seas 5 to 9 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 5 to 8 ft. .MON...S to SE winds 15 to 25 kt. Seas 5 to 8 ft. .MON NIGHT...W winds 15 to 25 kt. Seas 5 to 8 ft. .TUE...W winds 10 to 20 kt. Seas 4 to 6 ft. .TUE NIGHT...W winds 10 to 20 kt. Seas 4 to 6 ft. South of New England ...TROPICAL STORM WARNING... .TONIGHT...N to NE winds 25 to 35 kt. Seas 24 to 36 ft. Chance of showers and scattered tstms. .FRI...N winds 20 to 30 kt. Seas 15 to 26 ft. Chance of showers. .FRI NIGHT...W to SW winds 10 to 20 kt. Seas 11 to 17 ft. .SAT...S to SW winds 5 to 15 kt. Seas 8 to 12 ft. .SAT NIGHT...S winds 5 to 15 kt. Seas 6 to 10 ft. .SUN...S winds 5 to 15 kt. Seas 5 to 8 ft. .SUN NIGHT...S winds 5 to 15 kt. Seas 5 to 8 ft. .MON...S to SW winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...W winds 10 to 20 kt. Seas 3 to 6 ft. .TUE...W winds 10 to 20 kt. Seas 3 to 5 ft. .TUE NIGHT...W to NW winds 10 to 20 kt. Seas 3 to 6 ft.