Offshore Forecast
Issued by NWS
Issued by NWS
318 FZNT31 KNHC 310307 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1107 PM EDT Sat Aug 30 2025 Marine Weather HF Voice Broadcast for the Tropical N Atlantic from 07N to 19N W of 55W, the N Atlantic from 19N to 31N W of 55W including the Bahamas, and the Caribbean Sea. Seas given as significant wave height, which is the average height of the highest 1/3 of the waves. Individual waves may be more than twice the significant wave height. Synopsis for Caribbean Sea and Tropical N Atlantic from 07N to 19N W of 55W .SYNOPSIS...An upper level trough north of the area and tropical moisture combine to produce scattered showers and isolated thunderstorms in the NW Caribbean. The unsettled weather conditions will continue into early next week. Otherwise, Atlantic high pressure in combination with low pressure over northern Colombia will support fresh to strong trades along with moderate to locally rough seas across much of the central Caribbean through early next week. Later, moderate to locally fresh easterly winds and moderate seas will prevail across the central and eastern Caribbean through the workweek. NW Caribbean W of 85W .OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 ft. .TUE...E winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .WED...SE winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...SE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .THU...SE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 to 5 ft. .SUN...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .SUN NIGHT...E winds 10 to 15 kt S of 18N, and NE less than 10 kt elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .MON...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .MON NIGHT...NE winds less than 10 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .WED...SE winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 20 kt. Seas 5 to 7 ft. .SUN NIGHT...NE winds 15 to 20 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .OVERNIGHT...N winds less than 10 kt. Seas 3 to 5 ft. .SUN...NE winds 10 to 15 kt. Seas 4 to 6 ft. .SUN NIGHT...NE winds less than 10 kt. Seas 4 to 6 ft. .MON...SE winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...NW winds less than 10 kt. Seas 3 to 5 ft. .TUE...SW winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...NW winds less than 10 kt. Seas 3 to 4 ft. .WED...S winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...W winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 3 to 4 ft. .THU...Variable winds less than 10 kt. Seas 3 ft. .THU NIGHT...Variable winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .OVERNIGHT...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft. .SUN...E winds 15 to 20 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft. .SUN NIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 5 ft. .MON...E winds 10 to 15 kt. Seas 3 to 5 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU...E winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .SUN...E winds less than 10 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .MON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .TUE...E winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .OVERNIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .SUN...E winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 to 4 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .THU...E winds less than 10 kt. Seas 3 to 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A weak stationary front extends from a 1012 mb low off NE Florida to near Daytona Beach, Florida, with a surface trough extending southward offshore Florida through the NW Bahamas. Both features are leading to scattered thunderstorms N of Cuba and W of 75W, which will continue through early this week. The low pres will track NE to E, dragging the front southward across much of Florida. Behind the low, NE to E winds will increase to fresh to strong N of the front, mainly N of 29N and W of 77W Sun night into Tue. Elsewhere, high pressure will remain in control of the general weather pattern providing for a gentle to moderate anticyclonic wind flow. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...SW winds less than 10 kt. Seas 3 ft. .SUN...NW winds less than 10 kt. Seas 3 to 5 ft. .SUN NIGHT...N winds 10 to 20 kt. Seas 4 to 6 ft. .MON...N winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...NE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .WED...SE winds less than 10 kt. Seas 4 to 5 ft. .WED NIGHT...S winds less than 10 kt. Seas 4 ft. .THU...SW winds 10 kt. Seas 3 to 4 ft. .THU NIGHT...SW winds 10 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...SE winds 10 kt. Seas 3 ft. .SUN...S winds less than 10 kt. Seas 3 ft. .SUN NIGHT...S winds less than 10 kt. Seas 3 to 4 ft. .MON...SW winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...S winds less than 10 kt. Seas 3 to 5 ft. .TUE...SW winds less than 10 kt. Seas 3 to 5 ft. .TUE NIGHT...S winds less than 10 kt. Seas 3 to 5 ft. .WED...S winds 10 kt. Seas 4 to 5 ft. .WED NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. .THU...S winds 10 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...S winds 10 to 15 kt. Seas 3 to 5 ft. Bahamas N of 22N .OVERNIGHT...S winds less than 10 kt. Seas 2 ft or less. .SUN...SW winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...Variable winds less than 10 kt. Seas 2 ft or less. .MON...SW winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...SW winds less than 10 kt. Seas 2 ft or less. .TUE...SW winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...SW winds less than 10 kt. Seas 2 ft or less. .WED...SW winds less than 10 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .WED NIGHT...S winds less than 10 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .THU...SW winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...S winds less than 10 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...E winds 10 kt. Seas 3 ft. .SUN...S winds 10 kt. Seas 3 ft. .SUN NIGHT...W of 70W, S winds 10 kt. Elsewhere, Variable winds less than 10 kt, becoming SE 10 kt after midnight. Seas 3 ft. .MON...S winds 10 kt. Seas 3 ft. .MON NIGHT...S winds 10 kt. Seas 3 ft. .TUE...S winds 10 kt. Seas 3 ft. .TUE NIGHT...S winds 10 kt. Seas 3 to 4 ft. .WED...S winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .THU...SE winds 10 to 15 kt. Seas 3 to 4 ft. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...E winds less than 10 kt. Seas 2 ft or less. .SUN...SE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...SE winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .TUE...SE winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...SE winds less than 10 kt. Seas 2 ft or less. .WED...SE winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...E winds less than 10 kt. Seas 3 ft. .THU...SE winds 10 to 15 kt. Seas 3 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...E winds 10 kt. Seas 3 to 4 ft. .SUN...E winds 10 kt. Seas 3 to 4 ft. .SUN NIGHT...E winds 10 kt. Seas 3 to 4 ft. .MON...SE winds 10 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 10 kt. Seas 3 to 4 ft. .TUE...E winds 10 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 10 kt. Seas 3 to 4 ft. .WED...E winds 10 kt. Seas 4 ft. .WED NIGHT...E winds 10 kt. Seas 4 ft. .THU...E winds 10 kt. Seas 4 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 ft.