Offshore Forecast
Issued by NWS
Issued by NWS
217 FZNT31 KNHC 161513 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1113 AM EDT Sat Aug 16 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...Major Hurricane Erin is near 19.7N 62.8W at 11 AM EDT, and is moving west at 15 kt. Maximum sustained winds are 135 kt with gusts to 165 kt, and the minimum central pressure is 923 mb. Erin will move to near 20.1N 64.7W this evening with maximum sustained winds 145 kt gusts 175 kt, to near 21.0N 66.8W Sun morning, and continue to slowly weaken as it moves to near 22.3N 68.5W Sun evening with maximum sustained winds 135 kt gusts 165 kt, then move to near 23.5N 69.7W Mon morning, to near 24.9N 70.4W Mon evening with maximum sustained winds 125 kt gusts 150 kt and to near 26.4N 70.9W Tue morning. On the forecast track, the center of Erin is expected to move just north of the northern Leeward Islands, the Virgin Islands, and Puerto Rico over the weekend. Swells generated by Erin will affect portions of the northern Leeward Islands, the Virgin Islands, Puerto Rico, Hispaniola, and the Turks and Caicos Islands through the weekend. Moderate to fresh southerly winds over the eastern and north- central Caribbean will diminish to gentle to moderate speeds on Mon as Erin move farther away across the central Bahamas offshore waters. NW Caribbean W of 85W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...NE winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...E winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...E winds less than 10 kt. Seas 2 ft or less. .TUE...E winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...E winds less than 10 kt. Seas 2 ft or less. .WED...SE winds less than 10 kt. Seas 2 ft or less. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...E winds 10 to 20 kt. Seas 3 ft. .TONIGHT...S of 18N, NE winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Elsewhere, NE winds 10 to 20 kt. Seas 3 ft in the evening, subsiding to 2 ft or less. .SUN...NE winds 10 to 15 kt. Seas 2 ft or less. .SUN NIGHT...N winds 10 to 15 kt. Seas 2 ft or less. .MON...S of 18N, W winds less than 10 kt. Elsewhere, NE winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. .MON NIGHT...NW winds less than 10 kt. Seas 2 ft or less. .TUE...S winds less than 10 kt S of 18N, and W 10 to 15 kt elsewhere. Seas 2 ft or less. .TUE NIGHT...SE winds less than 10 kt S of 18N, and SW 10 to 15 kt elsewhere. Seas 2 ft or less. .WED...S of 18N, SE winds 10 to 15 kt. Elsewhere, SW winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 2 ft or less. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...Within 90 nm of coast of Colombia, S winds 10 to 15 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 3 to 4 ft. .TONIGHT...NE winds less than 10 kt. Seas 3 ft. .SUN...NE winds 10 to 15 kt, shifting to NW in the afternoon. Seas 3 ft. .SUN NIGHT...NW winds less than 10 kt. Seas 3 ft. .MON...SW winds 10 to 15 kt. Seas 3 ft. .MON NIGHT...W winds less than 10 kt, shifting to NE after midnight. Seas 2 ft or less. .TUE...E winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...Within 90 nm of coast of Colombia, NE winds less than 10 kt, shifting to E after midnight. Elsewhere, E winds 10 to 15 kt. Seas 2 ft or less. .WED...E winds 10 to 15 kt. Seas 2 ft or less. SW Caribbean S of 11N .THIS AFTERNOON...W winds 10 to 15 kt. Seas 3 ft. .TONIGHT...NW winds 10 to 15 kt, diminishing to less than 10 kt after midnight. Seas 3 ft. .SUN...W winds less than 10 kt. Seas 3 ft in the morning, subsiding to 2 ft or less. .SUN NIGHT...W winds less than 10 kt. Seas 2 ft or less. .MON...SW winds 10 to 15 kt. Seas 2 ft or less. .MON NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 2 ft or less. .TUE...Variable winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...E winds less than 10 kt. Seas 2 ft or less. .WED...NE winds less than 10 kt. Seas 2 ft or less. Caribbean between 64W and 72W .THIS AFTERNOON...Gulf of Venezuela, Variable winds less than 10 kt, becoming SW less than 10 kt in the afternoon. Elsewhere, SE winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .TONIGHT...Gulf of Venezuela, NE winds less than 10 kt. Elsewhere, N winds 10 to 20 kt, shifting to SW after midnight. Seas 3 ft. .SUN...Gulf of Venezuela, Variable winds less than 10 kt, becoming W less than 10 kt in the afternoon. Elsewhere, SW winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .SUN NIGHT...Gulf of Venezuela, N winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Elsewhere, S winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .MON...Gulf of Venezuela, Variable winds less than 10 kt, becoming NW less than 10 kt in the afternoon. Elsewhere, S winds 10 to 20 kt. Seas 2 ft or less Gulf of Venezuela, and 3 to 4 ft elsewhere. .MON NIGHT...SE winds 10 to 20 kt. Seas 3 ft. .TUE...NE winds less than 10 kt Gulf of Venezuela, and SE 10 to 15 kt elsewhere. Seas 2 ft or less Gulf of Venezuela, and 3 ft elsewhere. .TUE NIGHT...E winds 10 to 15 kt. Seas 2 ft or less Gulf of Venezuela, and 3 ft elsewhere. .WED...E winds 10 to 15 kt. Seas 3 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...TROPICAL STORM CONDITIONS POSSIBLE. S winds 20 to 30 kt. Seas 8 to 11 ft. .TONIGHT...S winds 20 to 30 kt. Seas 6 to 9 ft. .SUN...SE winds 15 to 25 kt. Seas 5 to 7 ft. .SUN NIGHT...SE winds 10 to 20 kt. Seas 4 to 6 ft. .MON...SE 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 4 to 6 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. .WED...E winds 10 to 20 kt. Seas 4 to 6 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...SE winds 10 to 15 kt. Seas 3 to 5 ft. .TONIGHT...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN...SE winds 10 to 15 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 5 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 5 ft. .WED...E winds 10 to 15 kt. Seas 3 to 5 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...Major Hurricane Erin is near 19.7N 62.8W at 11 AM EDT, and is moving west at 15 kt. Maximum sustained winds are 135 kt with gusts to 165 kt, and the minimum central pressure is 923 mb. Erin will move to near 20.1N 64.7W this evening with maximum sustained winds 145 kt gusts 175 kt, to near 21.0N 66.8W Sun morning, and continue to slowly weaken as it moves to near 22.3N 68.5W Sun evening with maximum sustained winds 135 kt gusts 165 kt, then move to near 23.5N 69.7W Mon morning, to near 24.9N 70.4W Mon evening with maximum sustained winds 125 kt gusts 150 kt and to near 26.4N 70.9W Tue morning. Erin is forecast to change little in intensity as it moves to near 30.6N 70.9W early on Wed, then continue to weaken later on Wed as it lifts well north of 31N. Swells generated by Erin will affect portions of the northern Leeward Islands, the Virgin Islands, Puerto Rico, Hispaniola, and the Turks and Caicos Islands through the weekend. These swells will spread to the Bahamas, Bermuda, and the east coast of the United States early next week. Otherwise, high pressure will ridging will begin to ridge southward off the southeast U.S. on Sun. The gradient between the ridge and Erin will promote moderate to fresh north to northeast offshore northern Florida beginning Mon. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...NW winds less than 10 kt. Seas 2 ft or less. .TONIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...NW winds less than 10 kt. Seas 3 ft. .SUN NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. .MON...NE winds 10 to 15 kt. Seas 6 to 9 ft. .MON NIGHT...NE winds 10 to 15 kt. Seas 8 to 11 ft. .TUE...N winds 10 to 20 kt. Seas 9 to 12 ft. .TUE NIGHT...N winds 10 to 20 kt. Seas 9 to 13 ft. .WED...N winds 10 to 20 kt. Seas 9 to 13 ft. ATLC waters from 27N to 31N between 65W and 77W .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 20 kt. Seas 3 to 4 ft W of 70W, and 4 to 6 ft elsewhere. .SUN...SE winds 10 to 15 kt. Seas 4 to 6 ft W of 70W, and 7 to 10 ft elsewhere. .SUN NIGHT...N winds 10 to 20 kt W of 70W, and SE 15 to 25 kt elsewhere. Seas 7 to 10 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. NE winds 20 to 30 kt W of 70W, and SE 20 to 30 kt elsewhere. Seas 9 to 14 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. .TUE...HURRICANE CONDITIONS POSSIBLE. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...HURRICANE CONDITIONS POSSIBLE. Bahamas N of 22N .THIS AFTERNOON...E winds 10 to 15 kt. Seas 2 ft or less. .TONIGHT...E winds 10 to 15 kt. Seas 2 ft or less. .SUN...NE winds 10 to 15 kt. Seas 2 ft or less, building to 3 ft in the afternoon. .SUN NIGHT...NE winds 10 to 20 kt. Seas 5 to 7 ft. .MON...N winds 15 to 25 kt. Seas 6 to 9 ft. .MON NIGHT...NW winds 15 to 25 kt. Seas 6 to 9 ft. .TUE...NW winds 10 to 20 kt. Seas 6 to 8 ft. .TUE NIGHT...W winds 10 to 20 kt. Seas 5 to 7 ft. .WED...W winds 10 to 15 kt. Seas 4 to 6 ft. ATLC waters from 22N to 27N between 65W and the Bahamas ...HURRICANE WARNING... .THIS AFTERNOON...NE winds 10 to 15 kt W of 70W, and NE 20 to 30 kt elsewhere. Seas 3 to 5 ft W of 70W, and 6 to 8 ft elsewhere. .TONIGHT...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, NE winds 10 to 20 kt, seas 4 to 6 ft. Elsewhere, NE winds 20 to 30 kt, increasing to 30 to 40 kt after midnight,Seas 7 to 10 ft, building to 10 to 15 ft after midnight. .SUN...TROPICAL STORM CONDITIONS EXPECTED. W of 70W, NE winds 10 to 20 kt, increasing to 20 to 30 kt in the afternoon,Seas 5 to 7 ft, building to 7 to 10 ft in the afternoon. Elsewhere, E winds 35 to 45 kt, increasing to 60 to 70 kt in the afternoon,Seas 13 to 18 ft, building to 17 to 22 ft in the afternoon. .SUN NIGHT...HURRICANE CONDITIONS EXPECTED. W of 70W, N winds 25 to 35 kt, increasing to 40 to 50 kt after midnight,Seas 10 to 15 ft, building to 13 to 18 ft after midnight. Elsewhere, E winds 105 to 125 kt, seas 18 to 28 ft. .MON...HURRICANE CONDITIONS POSSIBLE. W of 70W, N winds 70 to 80 kt, increasing to 95 to 115 kt in the afternoon,Seas 15 to 20 ft, building to 17 to 27 ft in the afternoon. Elsewhere, SE winds 105 to 125 kt, seas 18 to 28 ft. .MON NIGHT...HURRICANE CONDITIONS POSSIBLE. .TUE...HURRICANE CONDITIONS POSSIBLE. .TUE NIGHT...HURRICANE CONDITIONS POSSIBLE. .WED...TROPICAL STORM CONDITIONS POSSIBLE. ATLC waters S of 22N W of 65W ...HURRICANE WARNING... .THIS AFTERNOON...HURRICANE CONDITIONS POSSIBLE. NE winds 20 to 30 kt. Seas 6 to 8 ft. .TONIGHT...HURRICANE CONDITIONS EXPECTED. N winds 45 to 55 kt, increasing to 110 to 130 kt after midnight. Seas 7 to 10 ft, building to 11 to 16 ft after midnight. .SUN...HURRICANE CONDITIONS EXPECTED. N winds 110 to 130 kt, becoming NW 95 to 115 kt in the afternoon. Seas 16 to 21 ft, subsiding to 13 to 18 ft in the afternoon. .SUN NIGHT...TROPICAL STORM CONDITIONS EXPECTED. W winds 95 to 115 kt, diminishing to 45 to 55 kt after midnight. Seas 10 to 15 ft. .MON...TROPICAL STORM CONDITIONS POSSIBLE. SW winds 30 to 40 kt, diminishing to 20 to 30 kt in the afternoon. Seas 9 to 14 ft. .MON NIGHT...SW winds 20 to 30 kt. Seas 7 to 10 ft. .TUE...S winds 15 to 25 kt. Seas 6 to 9 ft. .TUE NIGHT...S winds 10 to 20 kt. Seas 6 to 8 ft. .WED...S winds 10 to 20 kt. Seas 4 to 6 ft. ATLC waters from 19N to 22N between 55W and 65W ...HURRICANE WARNING... .THIS AFTERNOON...HURRICANE CONDITIONS. SE winds 100 to 120 kt. Seas 13 to 18 ft. .TONIGHT...HURRICANE CONDITIONS EXPECTED. SE winds 100 to 120 kt, diminishing to 70 to 80 kt after midnight. Seas 11 to 16 ft. .SUN...TROPICAL STORM CONDITIONS EXPECTED. SE winds 30 to 40 kt, diminishing to 20 to 30 kt in the afternoon. Seas 8 to 13 ft. .SUN NIGHT...SE winds 20 to 30 kt. Seas 7 to 10 ft. .MON...SE winds 15 to 25 kt. Seas 6 to 9 ft. .MON NIGHT...SE winds 10 to 20 kt. Seas 6 to 8 ft. .TUE...SE winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...SE winds 10 to 15 kt. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 5 to 7 ft.