


Offshore Forecast
Issued by NWS
Issued by NWS
403 FZNT25 KWNM 210927 OFFN03 NAVTEX Marine Forecast for southeast U.S. waters NWS Ocean Prediction Center Washington DC 527 AM 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...Large hurricane Erin will move N and NE away from the waters today through Sat. Ongoing long period SE to S swell from Erin will slowly back to E and NE by later today through Fri night before gradually subsiding Sat and Sat night. A stationary front will form across the waters Fri and Fri night as high pressure builds N of the waters. A weak area of low pressure will form along the front off the South Carolina coast Sat night, then lift NE away from the waters Sun into Sun night while the area of high pressure to the N shifts E. A cold front will approach the area from the W late Sun night, then move E across the area Mon and Mon night. For more information on Hurricane Erin, please closely monitor the latest forecasts from the National Hurricane Center. Murrells Inlet to 31N ...TROPICAL STORM WARNING... .TODAY...NW winds 25 to 35 kt. Seas 13 to 26 ft. Scattered showers and tstms. .TONIGHT...N to NE winds 10 to 20 kt. Seas 8 to 15 ft. Scattered showers and chance of tstms. .FRI...E winds 5 to 15 kt. Seas 7 to 12 ft. Scattered showers and tstms. .FRI NIGHT...E winds 5 to 15 kt. Seas 6 to 11 ft. Showers and tstms likely. .SAT...E winds 10 to 20 kt. Seas 5 to 9 ft. .SAT NIGHT...S to SE winds 10 to 20 kt. Seas 5 to 8 ft. .SUN...W to SW winds 10 to 20 kt. Seas 5 to 8 ft. .SUN NIGHT...W winds 10 to 20 kt. Seas 5 to 7 ft. .MON...W to SW winds 10 to 20 kt. Seas 5 to 8 ft. .MON NIGHT...W winds 5 to 15 kt. Seas 5 to 7 ft. South of 31N .TODAY...NW winds 20 to 30 kt. Seas 10 to 19 ft. .TONIGHT...W winds 5 to 15 kt. Seas 7 to 11 ft. Scattered showers and tstms. .FRI...E to SE winds less than 10 kt. Seas 6 to 9 ft. Scattered showers and tstms. .FRI NIGHT...SE winds 5 to 15 kt. Seas 6 to 9 ft. Scattered showers and tstms. .SAT...S to SW winds less than 10 kt. Seas 5 to 8 ft. .SAT NIGHT...W to SW winds less than 10 kt. Seas 5 to 8 ft. .SUN...W winds 5 to 15 kt. Seas 5 to 7 ft. .SUN NIGHT...W winds 5 to 15 kt. Seas 5 to 7 ft. .MON...W winds 5 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...W winds less than 10 kt. Seas 4 to 7 ft.