


Offshore Forecast
Issued by NWS
Issued by NWS
821 FZNT26 KNHC 181620 OFFN05 NAVTEX Marine Forecast NWS National Hurricane Center Miami, FL 1220 PM EDT Mon Aug 18 2025 ...Please refer to Coastal Waters Forecasts (CWF) available through NOAA Weather Radio and other means for detailed Coastal Waters Forecasts... .SYNOPSIS...Hurricane Erin is centered near 23.1N 70.8W at 18/1500 UTC or 100 nm N of Grand Turk Island, moving WNW at 9 kt. Estimated minimum central pressure is 935 mb. Maximum sustained wind speed is 120 kt with gusts to 145 kt. Erin will move to 24.2N 71.6W this evening, 25.7N 72.5W Tue morning, 27.4N 73.2W Tue evening, 29.5N 73.5W Wed morning, 31.7N 73.1W Wed evening, and 33.9N 71.6W Thu morning. Bands of showers and thunderstorms continue over the island associated with Erin. Fresh S to SW winds over the north-central Caribbean and through the Atlantic passages will continue through tonight as Erin lifts northwestward to northward, with winds diminishing through Tue. Rough seas are expected in the Mona Passage today before seas subside tonight. Moderate to locally fresh trade winds and moderate are then expected late Tue through late this week over the central and eastern basin as high pressure builds in the wake of Erin. San Juan Atlantic Waters ...TROPICAL STORM WARNING... .THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. SE to S winds 20 to 30 kt. Seas 8 to 14 ft in W to NW swell. Scattered showers and isolated tstms. .TONIGHT...SE to S winds 20 to 25 kt. Seas 7 to 10 ft in W to NW swell. Scattered showers and isolated tstms. .TUE...SE to S winds 15 to 20 kt. Seas 6 to 9 ft. .TUE NIGHT...SE winds 15 to 20 kt. Seas 5 to 7 ft. .WED...SE winds 15 to 20 kt. Seas 5 to 6 ft. .WED NIGHT...E winds 15 to 20 kt. Seas 5 to 6 ft. .THU...E winds 10 to 15 kt. Seas 5 to 6 ft. .THU NIGHT...NE to E winds 10 to 15 kt. Seas 5 to 6 ft. .FRI...NE winds 15 to 20 kt. Seas 5 to 7 ft. San Juan Caribbean Waters .THIS AFTERNOON...SE to S winds 15 to 20 kt. Seas 4 to 6 ft. Scattered showers and isolated tstms. .TONIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. Scattered showers and isolated tstms. .TUE...SE winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E to SE winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E to SE winds 15 to 20 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 15 to 20 kt. Seas 4 to 5 ft. .THU...NE to E winds 10 to 15 kt. Seas 4 to 5 ft. .THU NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. .FRI...NE winds 10 to 15 kt. Seas 4 to 5 ft.