


Offshore Forecast
Issued by NWS
Issued by NWS
327 FZNT25 KWNM 200920 OFFN03 NAVTEX Marine Forecast for southeast U.S. waters NWS Ocean Prediction Center Washington DC 520 AM EDT Wed Aug 20 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...Hurricane Erin will move N through the outer waters today into tonight, while remaining E of the area. Erin will move NE away from the waters Thu through Sat. Ongoing long period SE to S swell from Erin will slowly back to E and NE tonight through Fri night before gradually diminishing 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 through the central waters Sun into Sun night while the area of high pressure to the N shifts E of the region. A cold front will approach the area from the W late Sun 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...N winds 40 to 55 kt. Seas 25 to 40 ft. Showers and tstms with vsby 1 nm or less. .TONIGHT...W to NW winds 45 to 60 kt. Seas 23 to 37 ft. Scattered showers and tstms with vsby 1 nm or less. .THU...NW winds 25 to 35 kt. Seas 14 to 24 ft. Showers and tstms. .THU NIGHT...N to NE winds 5 to 15 kt. Seas 9 to 15 ft. Scattered showers and tstms. .FRI...E winds 5 to 15 kt. Seas 8 to 12 ft. .FRI NIGHT...E winds 5 to 15 kt. Seas 7 to 11 ft. .SAT...E winds 10 to 20 kt. Seas 6 to 10 ft. .SAT NIGHT...S to SE winds 5 to 15 kt. Seas 5 to 9 ft. .SUN...S to SW winds 5 to 15 kt. Seas 5 to 8 ft. .SUN NIGHT...W to SW winds 5 to 15 kt. Seas 5 to 7 ft. South of 31N .TODAY...N winds 20 to 30 kt. Seas 14 to 27 ft. Showers and tstms with vsby 1 nm or less. .TONIGHT...NW winds 20 to 30 kt. Seas 13 to 22 ft. Scattered showers and tstms. .THU...NW winds 15 to 25 kt. Seas 9 to 15 ft. .THU NIGHT...W winds 5 to 15 kt. Seas 6 to 10 ft. Scattered showers and tstms. .FRI...E to SE winds less than 10 kt. Seas 6 to 9 ft. .FRI NIGHT...SE winds 5 to 15 kt. Seas 6 to 9 ft. .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.