Offshore Forecast
Issued by NWS
Issued by NWS
728 FZNT31 KNHC 302044 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 444 PM EDT Tue Sep 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...High pressure over the central Atlantic will continue to support moderate to fresh easterly trade winds and moderate seas over the eastern and central Caribbean through Thu. The pressure gradient will then weaken leading to moderate or lighter winds and seas through the Sat. However, northerly swell from tropical cyclones Humberto and Imelda will reach the passages of the NE Caribbean allowing for rough seas late Fri and into the weekend. NW Caribbean W of 85W .TONIGHT...NE winds less than 10 kt, shifting to E after midnight. Seas 2 ft or less. .WED...E winds less than 10 kt. Seas 2 ft or less. .WED NIGHT...NE winds less than 10 kt, shifting to E after midnight. Seas 2 ft or less. .THU...E winds 10 to 15 kt. Seas 2 ft or less. .THU NIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .FRI...E winds 10 to 15 kt, shifting to NE in the afternoon. Seas 2 ft or less. .FRI NIGHT...E winds less than 10 kt. Seas 2 ft or less. .SAT...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 2 ft or less. .SAT NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 ft or less. .SUN...E winds 10 to 20 kt. Seas 2 ft or less, building to 3 to 4 ft in the afternoon. Caribbean N of 15N between 72W and 85W .TONIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, W winds 10 to 15 kt, shifting to NW after midnight. Seas 3 ft. .WED...S of 18N, E winds 10 to 15 kt. Elsewhere, SW winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 3 ft. .WED NIGHT...S of 18N, E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Elsewhere, NE winds less than 10 kt. Seas 3 ft. .THU...E winds 10 to 15 kt S of 18N, and E less than 10 kt elsewhere. Seas 2 ft or less, building to 3 ft in the afternoon. .THU NIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 to 4 ft S of 18N, and 2 ft or less elsewhere. .FRI...S of 18N, E winds 10 to 15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft or less. .FRI NIGHT...E winds 10 to 20 kt. Seas 3 ft. .SAT...E winds 10 to 15 kt. Seas 3 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 3 to 4 ft. .SUN...SE winds 10 to 20 kt. Seas 3 to 4 ft. Caribbean from 11N to 15N W of 72W .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .WED...E winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...NW winds less than 10 kt within 90 nm of coast of Colombia, and E 10 to 15 kt elsewhere. Seas 3 ft. .THU...E winds less than 10 kt within 90 nm of coast of Colombia, and E 10 to 20 kt elsewhere. Seas 3 ft. .THU NIGHT...Within 90 nm of coast of Colombia, NE winds less than 10 kt, increasing to 10 to 15 kt after midnight. Elsewhere, E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI...E winds 10 to 15 kt. Seas 2 ft or less. .FRI NIGHT...E winds 10 to 20 kt. Seas 2 ft or less, building to 3 ft after midnight. .SAT...SE winds 10 to 20 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft. .SUN...SE winds 10 to 20 kt. Seas 3 to 4 ft. SW Caribbean S of 11N .TONIGHT...N winds 10 to 15 kt, shifting to S after midnight. Seas 2 ft or less. .WED...SW winds 10 to 15 kt. Seas 2 ft or less. .WED NIGHT...SW winds less than 10 kt. Seas 2 ft or less. .THU...S winds less than 10 kt. Seas 2 ft or less. .THU NIGHT...W winds less than 10 kt. Seas 2 ft or less. .FRI...Variable winds less than 10 kt. Seas 2 ft or less. .FRI NIGHT...SW winds less than 10 kt. Seas 2 ft or less. .SAT...S winds 10 to 15 kt. Seas 2 ft or less. .SAT NIGHT...S winds 10 to 15 kt. Seas 2 ft or less. .SUN...S winds 10 to 15 kt. Seas 3 ft. Caribbean between 64W and 72W .TONIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .WED...SE winds 10 to 20 kt. Gulf of Venezuela, seas 3 ft in the morning, subsiding to 2 ft or less. Elsewhere, seas 3 to 5 ft. .WED NIGHT...Gulf of Venezuela, NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, E winds 10 to 20 kt. Seas 3 to 4 ft. .THU...Gulf of Venezuela, E winds less than 10 kt, shifting to SW in the afternoon. Elsewhere, E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .THU NIGHT...E winds 10 to 15 kt. Seas 3 ft. .FRI...E winds 10 to 20 kt. Seas 3 ft. .FRI NIGHT...NE winds 10 to 20 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 3 to 4 ft. .SAT...E winds 10 to 20 kt. Seas 3 to 4 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. .SUN...E winds 10 to 15 kt. Seas 3 to 4 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .TONIGHT...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 less than 10 kt. Seas 3 to 5 ft. .THU...SE winds less than 10 kt. Seas 3 to 5 ft. .THU NIGHT...NE winds less than 10 kt. Seas 3 to 5 ft. .FRI...NE winds less than 10 kt. Seas 4 to 6 ft. .FRI NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .SUN...E winds less than 10 kt. Seas 5 to 7 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .TONIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...SE winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...E winds 10 to 20 kt. Seas 3 to 5 ft. .THU...SE winds 10 to 20 kt. Seas 3 to 5 ft. .THU NIGHT...E winds 10 to 15 kt. Seas 3 ft. .FRI...E winds 10 to 15 kt. Seas 3 to 4 ft. .FRI NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .SAT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 5 to 7 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Hurricane Humberto is N of the area near 34.0N 69.5W at 5 PM EDT, and is moving north at 15 kt. Maximum sustained winds are 70 kt with gusts to 85 kt, and the minimum central pressure is 979 mb. Humberto will move to 35.3N 68.3W Wed morning, weaken as an extratropical cyclone near 36.1N 65.0W Wed afternoon, and dissipate Thu morning. Hurricane Imelda is near 29.4N 75.5W at 5 PM EDT, and is moving east-northeast at 10 kt. Maximum sustained winds are 75 kt with gusts to 90 kt, and the minimum central pressure is 978 mb. Imelda will move to 30.0N 73.1W Wed morning, 31.2N 68.7W Wed afternoon, 32.8N 63.4W Thu morning, 34.9N 56.7W Thu afternoon, become extratropical and move to 38.0N 51.5W Fri morning, and weaken as an extratropical cyclone near 40.4N 49.1W Fri afternoon. Imelda will change little in intensity as it moves to 45.5N 43.0W by Sat afternoon. Strong to gale-force winds and rough to high seas expected north of 26N and east of 73W shifting eastward Wed night through early Fri. Rough seas will persist over much of the basin through the weekend. ATLC waters from 27N to 31N W of 77W ...TROPICAL STORM WARNING... .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. N winds 35 to 45 kt, diminishing to 20 to 30 kt after midnight. Seas 14 to 19 ft. .WED...N winds 15 to 25 kt. Seas 11 to 16 ft. .WED NIGHT...NE winds 15 to 25 kt. Seas 9 to 13 ft. .THU...NE winds 10 to 20 kt. Seas 9 to 13 ft. .THU NIGHT...E winds 15 to 25 kt. Seas 10 to 13 ft. .FRI...E winds 15 to 20 kt. Seas 10 to 12 ft. .FRI NIGHT...E winds 15 to 20 kt. Seas 9 to 12 ft. .SAT...E winds 15 to 25 kt. Seas 9 to 11 ft. .SAT NIGHT...E winds 15 to 25 kt. Seas 8 to 11 ft. .SUN...SE winds 15 to 25 kt. Seas 8 to 11 ft. ATLC waters from 27N to 31N between 65W and 77W ...HURRICANE WARNING... .TONIGHT...HURRICANE CONDITIONS. W of 70W, SW winds 65 to 80 kt, seas 16 to 21 ft, building to 15 to 25 ft after midnight. Elsewhere, S winds 20 to 30 kt, increasing to 30 to 40 kt after midnight,Seas 10 to 15 ft. .WED...HURRICANE CONDITIONS EXPECTED. W of 70W, NW winds 65 to 80 kt, seas 16 to 26 ft, subsiding to 17 to 22 ft in the afternoon. Elsewhere, S winds 45 to 55 kt, becoming SW 70 to 80 kt in the afternoon,Seas 14 to 19 ft, building to 16 to 26 ft in the afternoon. .WED NIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, N winds 25 to 35 kt. Elsewhere, W winds 50 to 60 kt, becoming NW 35 to 45 kt after midnight. Seas 14 to 19 ft W of 70W, and 16 to 26 ft elsewhere. .THU...TROPICAL STORM CONDITIONS POSSIBLE. W of 70W, NE winds 15 to 20 kt. Elsewhere, N winds 25 to 35 kt, diminishing to 15 to 25 kt in the afternoon. Seas 12 to 17 ft W of 70W, and 16 to 21 ft elsewhere. .THU NIGHT...NE winds 15 to 25 kt. Seas 12 to 15 ft W of 70W, and 13 to 18 ft elsewhere. .FRI...E winds 15 to 20 kt. Seas 11 to 14 ft. .FRI NIGHT...E winds 15 to 20 kt. Seas 11 to 13 ft. .SAT...E winds 15 to 20 kt. Seas 10 to 12 ft. .SAT NIGHT...E winds 15 to 20 kt. Seas 9 to 11 ft. .SUN...E winds 15 to 20 kt. Seas 8 to 11 ft. Bahamas N of 22N .TONIGHT...W winds 15 to 25 kt. Seas 5 to 7 ft. .WED...W winds 10 to 20 kt. Seas 4 to 6 ft. .WED NIGHT...NW winds 10 to 15 kt. Seas 4 to 6 ft. .THU...N winds 10 to 15 kt. Seas 4 to 6 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. .SAT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SAT NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .SUN...SE winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .TONIGHT...SW winds 20 to 30 kt W of 70W, and S 20 to 30 kt elsewhere. Seas 8 to 13 ft W of 70W, and 7 to 10 ft elsewhere. .WED...SW winds 20 to 30 kt. Seas 8 to 11 ft. .WED NIGHT...NW winds 10 to 20 kt W of 70W, and SW 15 to 25 kt elsewhere. Seas 8 to 11 ft. .THU...N winds 10 to 20 kt. Seas 9 to 14 ft. .THU NIGHT...NE winds 10 to 20 kt. Seas 9 to 14 ft. .FRI...NE winds 10 to 20 kt. Seas 10 to 13 ft. .FRI NIGHT...E winds 10 to 20 kt. Seas 9 to 12 ft. .SAT...E winds 10 to 20 kt. Seas 9 to 12 ft. .SAT NIGHT...E winds 10 to 20 kt. Seas 9 to 11 ft. .SUN...E winds 10 to 20 kt. Seas 8 to 11 ft. ATLC waters S of 22N W of 65W .TONIGHT...S winds 10 to 20 kt. Seas 3 to 5 ft. .WED...S winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...SW winds 10 to 15 kt, shifting to S after midnight. Seas 3 to 5 ft. .THU...SW winds less than 10 kt. Seas 4 to 6 ft. .THU NIGHT...NE winds less than 10 kt. Seas 5 to 7 ft. .FRI...NE winds less than 10 kt. Seas 5 to 7 ft. .FRI NIGHT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT...E winds less than 10 kt. Seas 5 to 7 ft. .SAT NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .SUN...E winds 10 to 15 kt. Seas 5 to 7 ft. ATLC waters from 19N to 22N between 55W and 65W .TONIGHT...SE winds 10 to 15 kt. Seas 5 ft. .WED...SE winds 10 to 15 kt. Seas 4 to 5 ft. .WED NIGHT...SE winds 10 kt. Seas 4 to 5 ft. .THU...SE winds 10 kt. Seas 5 to 7 ft. .THU NIGHT...S winds less than 10 kt, shifting to N after midnight. Seas 6 to 9 ft. .FRI...NE winds less than 10 kt. Seas 7 to 10 ft. .FRI NIGHT...E winds less than 10 kt. Seas 8 to 10 ft. .SAT...E winds less than 10 kt. Seas 9 to 10 ft. .SAT NIGHT...E winds 10 kt. Seas 9 to 10 ft. .SUN...E winds 10 kt. Seas 8 to 9 ft.