Offshore Forecast
Issued by NWS
Issued by NWS
328 FZNT31 KNHC 250246 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1046 PM EDT Sun Aug 24 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...A tropical wave just east of the Windward Islands is producing a large area of showers and thunderstorms with winds to near gale force. These conditions are expected to affect the Windward and Leeward Islands tonight and Mon. Earlier reconnaissance aircraft data indicated that the system did not have a closed low-level circulation. Another Air Force reconnaissance aircraft is scheduled to investigate the system overnight, if necessary. The disturbance is expected to reach the central Caribbean Sea on Tue, where conditions are forecast to become less favorable for additional development. This system associated will also bring increasing winds and building seas across the east and central Caribbean tonight through Wed. Fresh to strong E to SE winds will pulse across the Gulf of Honduras mainly at night through Tue night. NW to N swell will continue to propagate across the tropical Atlantic waters and move through the Atlantic Passages through at least Mon. NW Caribbean W of 85W .OVERNIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .MON...E winds 10 to 20 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...NE winds 10 to 15 kt. Seas 3 to 4 ft. .WED...NE winds 10 to 15 kt, shifting to E in the afternoon. Seas 3 to 4 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 to 4 ft. .THU...E winds less than 10 kt. Seas 3 ft. .THU NIGHT...E winds less than 10 kt. Seas 3 ft. .FRI...E winds less than 10 kt. Seas 3 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Caribbean N of 15N between 72W and 85W .OVERNIGHT...E winds 10 to 20 kt S of 18N, and E less than 10 kt elsewhere. Seas 4 to 6 ft S of 18N, and 3 ft elsewhere. .MON...E winds 10 to 20 kt. S of 18N, seas 4 to 6 ft. Elsewhere, seas 2 ft or less, building to 3 ft in the afternoon. .MON NIGHT...E winds 10 to 20 kt S of 18N, and NE less than 10 kt elsewhere. Seas 5 to 7 ft S of 18N, and 3 ft elsewhere. .TUE...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU...E winds 10 to 20 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 20 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Caribbean from 11N to 15N W of 72W .OVERNIGHT...E winds 20 to 30 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 8 to 11 ft within 90 nm of coast of Colombia, and 5 to 7 ft elsewhere. .MON...E winds 15 to 25 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 7 to 10 ft within 90 nm of coast of Colombia, and 6 to 8 ft elsewhere. .MON NIGHT...NE winds 15 to 25 kt within 90 nm of coast of Colombia, and NE 10 to 20 kt elsewhere. Seas 6 to 8 ft. .TUE...E winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...NE winds 10 to 20 kt. Seas 6 to 9 ft. .WED...E winds 10 to 20 kt. Seas 6 to 9 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 6 to 8 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 15 kt. Seas 5 to 7 ft. .FRI NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. SW Caribbean S of 11N .OVERNIGHT...N winds less than 10 kt. Seas 3 to 4 ft. .MON...N winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 5 to 7 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...NE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...N winds less than 10 kt. Seas 4 to 6 ft. .WED...SW winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...NW winds less than 10 kt. Seas 4 to 5 ft. .THU...S winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft. .FRI...Variable winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. Caribbean between 64W and 72W .OVERNIGHT...E winds 20 to 30 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 4 to 6 ft. .MON...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 5 to 7 ft elsewhere. .MON NIGHT...NE winds 20 to 25 kt Gulf of Venezuela, and E 15 to 25 kt elsewhere. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .TUE...E winds 10 to 20 kt. Seas 3 to 5 ft Gulf of Venezuela, and 6 to 9 ft elsewhere. .TUE NIGHT...E winds 10 to 20 kt. Seas 6 to 9 ft. .WED...E winds 10 to 20 kt. Seas 6 to 8 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU...E winds 10 to 20 kt. Seas 5 to 7 ft. .THU NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI...E winds 10 to 20 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .OVERNIGHT...E winds 10 to 20 kt. Seas 7 to 10 ft. .MON...E winds 10 to 20 kt. Seas 7 to 10 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 6 to 8 ft. .TUE...E 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 6 ft. .WED NIGHT...E winds less than 10 kt. Seas 3 to 5 ft. .THU...E winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 5 ft. .FRI 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 10 to 15 kt. Seas 6 to 8 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...SE winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU...E winds 10 to 15 kt. Seas 4 to 6 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI...E winds 10 to 15 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Tropical Storm Fernand is N of the area near 32.6N 59.3W at 11 PM EDT, and is moving north-northeast at 11 kt. Maximum sustained winds are 45 kt with gusts to 55 kt, and the minimum central pressure is 1007 mb. Fernand will continue to move away from the waters reaching 34.0N 58.4W Mon morning. As Fernand continues to moves away from the forecast area, a ridge will build back across most of the region. A frontal boundary and pre- frontal trough will linger off the SE U.S. coast likely through Wed with fresh to locally strong winds SE of it. Fresh to strong winds will pulse N of Hispaniola late Mon afternoon through Tue night. Meanwhile, decaying rough to very rough northerly swell will continue to affect the W Atlantic waters through Mon morning. ATLC waters from 27N to 31N W of 77W .OVERNIGHT...W winds 10 to 15 kt. Seas 6 to 8 ft. .MON...SW winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...SW winds 10 to 15 kt. Seas 4 to 6 ft. .TUE...SW winds 10 kt. Seas 3 to 5 ft. .TUE NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .WED...W winds 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 ft. .WED NIGHT...Variable winds less than 10 kt. Seas 3 ft. .THU...Variable winds less than 10 kt. Seas 3 ft. .THU NIGHT...Variable winds less than 10 kt, becoming S less than 10 kt after midnight. Seas 3 ft. .FRI...SW winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 3 ft. .FRI NIGHT...E winds less than 10 kt. Seas 3 ft. ATLC waters from 27N to 31N between 65W and 77W .OVERNIGHT...W of 70W, SW winds 10 to 20 kt. Elsewhere, SW winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 6 to 8 ft. .MON...SW winds 10 to 20 kt. Seas 6 to 8 ft. .MON NIGHT...W of 70W, SW winds 10 to 15 kt. Elsewhere, SW winds 10 to 15 kt, shifting to S after midnight. Seas 6 to 8 ft. .TUE...S winds 10 to 15 kt. Seas 4 to 6 ft. .TUE NIGHT...S winds less than 10 kt. Seas 3 to 5 ft. .WED...S winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...S 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 to 4 ft. .THU NIGHT...SE winds less than 10 kt. Seas 3 to 4 ft. .FRI...SW winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...Variable winds less than 10 kt. Seas 3 ft. Bahamas N of 22N .OVERNIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. .MON...SE winds less than 10 kt. Seas 3 to 5 ft. .MON NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 3 to 5 ft. .TUE...E winds 10 to 15 kt. Seas 3 to 5 ft. .TUE NIGHT...E winds 10 to 15 kt. 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 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 ft. .FRI...SE winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...SE winds less than 10 kt. Seas 2 ft or less. ATLC waters from 22N to 27N between 65W and the Bahamas .OVERNIGHT...SE winds 10 to 15 kt W of 70W, and SE less than 10 kt elsewhere. Seas 6 to 7 ft. .MON...SE winds less than 10 kt. Seas 6 to 7 ft. .MON NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED NIGHT...E winds less than 10 kt. Seas 4 to 5 ft. .THU...E winds 10 kt. Seas 3 to 5 ft. .THU NIGHT...SE winds 10 kt. Seas 3 to 4 ft. .FRI...SE winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 3 ft. ATLC waters S of 22N W of 65W .OVERNIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON...E winds 10 to 15 kt. Seas 5 to 7 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 20 kt. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 4 to 6 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 4 ft. .FRI...E winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds less than 10 kt. Seas 3 ft. ATLC waters from 19N to 22N between 55W and 65W .OVERNIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft. .MON...E winds 10 to 15 kt. Seas 7 to 8 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft. .TUE...E winds 10 to 15 kt. Seas 6 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 6 ft. .WED...SE winds 10 to 15 kt. Seas 5 to 6 ft. .WED NIGHT...SE winds 10 kt. Seas 5 to 6 ft. .THU...SE winds 10 kt. Seas 4 to 5 ft. .THU NIGHT...E winds 10 kt. Seas 4 to 5 ft. .FRI...E winds 10 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 kt. Seas 3 to 4 ft.