


Offshore Forecast
Issued by NWS
Issued by NWS
963 FZNT31 KNHC 181516 OFFN20 Marine Weather HF Voice Broadcast NWS National Hurricane Center Miami, FL 1116 AM EDT Sat Oct 18 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...Gentle to moderate trade winds and slight to moderate seas are expected over the Caribbean Sea today. Winds will freshen over the south-central through eastern basin tonight through Sun as high pressure builds over the western Atlantic. Locally strong winds will be possible in the Gulf of Venezuela on Sun. A long period N swell will lead to rough seas through the Atlantic passages and over the waters east of the Lesser Antilles Sun into early next week. Looking ahead, a tropical wave located in the central Atlantic will move westward this weekend, entering the eastern Caribbean Sun night. Fresh to strong winds and rough seas will accompany this wave as it moves over the eastern and central Caribbean early next week. This system has a low chance of tropical development within the next 7 days. NW Caribbean W of 85W .THIS AFTERNOON...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt. Seas 2 ft or less, building to 3 ft after midnight. .SUN...SE winds less than 10 kt. Seas 3 ft. .SUN NIGHT...E winds less than 10 kt. Seas 2 ft or less. .MON...E winds less than 10 kt. Seas 2 ft or less. .MON NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .TUE...NE winds less than 10 kt. Seas 2 ft or less. .TUE NIGHT...NE winds less than 10 kt. Seas 2 ft or less. .WED...NE winds less than 10 kt, shifting to N in the afternoon. Seas 2 ft or less, building to 3 ft in the afternoon. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean N of 15N between 72W and 85W .THIS AFTERNOON...SE winds less than 10 kt. Seas 2 ft or less. .TONIGHT...E winds less than 10 kt. Seas 2 ft or less. .SUN...E winds 10 to 15 kt S of 18N, and SE less than 10 kt elsewhere. Seas 3 ft. .SUN NIGHT...S of 18N, E winds 10 to 15 kt. Elsewhere, Variable winds less than 10 kt, becoming E less than 10 kt after midnight. Seas 3 to 5 ft S of 18N, and 2 ft or less elsewhere. .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 15 kt. Seas 4 to 6 ft. .WED...NE winds 10 to 15 kt. Seas 3 to 5 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 to 5 ft. Caribbean from 11N to 15N W of 72W .THIS AFTERNOON...E winds less than 10 kt. Seas 2 ft or less. .TONIGHT...Within 90 nm of coast of Colombia, E winds 10 to 20 kt. Elsewhere, E winds less than 10 kt, increasing to 10 to 20 kt after midnight. Seas 2 ft or less, building to 3 ft after midnight. .SUN...E winds 10 to 20 kt. Seas 3 to 5 ft. .SUN NIGHT...E winds 15 to 25 kt. Seas 4 to 6 ft. .MON...E winds 10 to 20 kt. Seas 4 to 6 ft. .MON NIGHT...E winds 10 to 20 kt. Seas 4 to 6 ft. .TUE...E winds 10 to 20 kt. Seas 5 to 7 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. .WED...E winds less than 10 kt. Seas 4 to 6 ft. .WED NIGHT...SE winds less than 10 kt. Seas 3 to 5 ft. SW Caribbean S of 11N .THIS AFTERNOON...Variable winds less than 10 kt. Seas 2 ft or less. .TONIGHT...NE winds less than 10 kt. Seas 2 ft or less. .SUN...Variable winds less than 10 kt. Seas 2 ft or less. .SUN NIGHT...NW winds less than 10 kt in the evening, becoming variable winds less than 10 kt. Seas 2 ft or less. .MON...W winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...W winds less than 10 kt. Seas 3 to 5 ft. .TUE...SW winds less than 10 kt. Seas 3 to 5 ft. .TUE NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .WED...W winds less than 10 kt. Seas 3 ft. .WED NIGHT...SW winds less than 10 kt. Seas 3 ft. Caribbean between 64W and 72W .THIS AFTERNOON...E winds less than 10 kt Gulf of Venezuela, and E 10 to 15 kt elsewhere. Seas 3 to 4 ft. .TONIGHT...E winds 10 to 20 kt. Gulf of Venezuela, seas 2 ft or less, building to 3 ft after midnight. Elsewhere, seas 3 to 5 ft. .SUN...E winds 15 to 25 kt. Seas 3 ft Gulf of Venezuela, and 4 to 6 ft elsewhere. .SUN NIGHT...E winds 15 to 25 kt Gulf of Venezuela, and E 10 to 20 kt elsewhere. Seas 5 to 7 ft. .MON...E winds 10 to 20 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 4 to 6 ft. Offshore Leeward Islands and adjacent ATLC waters from 15N to 19N W of 55W .THIS AFTERNOON...SE winds less than 10 kt. Seas 3 to 6 ft. .TONIGHT...E winds 10 to 20 kt. Seas 5 to 9 ft. .SUN...E winds 15 to 25 kt. Seas 7 to 9 ft. .SUN NIGHT...E winds 15 to 25 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 9 ft. .TUE...E winds 10 to 15 kt. Seas 6 to 8 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. Offshore Windward Islands and adjacent ATLC waters from 07N to 15N W of 55W .THIS AFTERNOON...E winds 10 to 15 kt. Seas 4 to 6 ft. .TONIGHT...E winds 15 to 25 kt. Seas 5 to 9 ft. .SUN...E winds 15 to 25 kt. Seas 5 to 9 ft. .SUN NIGHT...E winds 15 to 25 kt. Seas 5 to 9 ft. .MON...E winds 10 to 20 kt. Seas 6 to 9 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 6 to 9 ft. .TUE...E winds 10 to 15 kt. Seas 6 to 9 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED...E winds 10 to 15 kt. Seas 5 to 7 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Synopsis for the the SW N Atlantic including the Bahamas .SYNOPSIS...A cold front extending from a low pressure system in the central Atlantic through the southern Bahamas will progress northeastward this weekend. Fresh to strong W to NW winds are expected in the wake of the front north of 27N and east of 65W through Sun morning. Widespread rough seas associated with this storm system will continue north of 20N and east of 77W through tonight, with rough seas expanding southeastward through the Greater Antilles Atlantic Passages on Sun. Very rough seas in excess of 12 ft are expected north of 25N and east of 72W into Sun afternoon. Rough seas will slowly subside from west to east Sun into early next week. Elsewhere, moderate to locally fresh E to NE winds will occur over the Bahamas and through the Florida Straits through Sun morning as high pressure builds over the western Atlantic this weekend. Looking ahead, a series of cold fronts are slated to push off the coast of the southeastern United States early next week, leading to increasing N winds offshore of Florida. ATLC waters from 27N to 31N W of 77W .THIS AFTERNOON...NE winds 10 kt. Seas 6 to 7 ft. .TONIGHT...SE winds 10 kt. Seas 6 to 8 ft. .SUN...S winds 10 to 15 kt. Seas 6 to 8 ft. .SUN NIGHT...S winds 10 to 15 kt. Seas 6 to 7 ft. .MON...SW winds 10 to 15 kt, shifting to N in the afternoon. Seas 5 to 6 ft. .MON NIGHT...E winds less than 10 kt. Seas 4 to 6 ft. .TUE...Variable winds less than 10 kt. Seas 3 to 5 ft. .TUE NIGHT...SW winds less than 10 kt. Seas 3 to 4 ft. .WED...NW winds 10 to 15 kt. Seas 3 to 4 ft. .WED NIGHT...N winds 10 kt. Seas 3 to 4 ft. ATLC waters from 27N to 31N between 65W and 77W .THIS AFTERNOON...N winds 10 to 20 kt. Seas 8 to 12 ft W of 70W, and 11 to 17 ft elsewhere. .TONIGHT...N winds 10 to 15 kt, shifting to NE after midnight. Seas 8 to 12 ft W of 70W, and 11 to 15 ft elsewhere. .SUN...E winds less than 10 kt. Seas 8 to 11 ft. .SUN NIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 6 to 9 ft. .MON...S winds less than 10 kt in the morning, becoming variable winds less than 10 kt. Seas 5 to 7 ft. .MON NIGHT...Variable winds less than 10 kt. Seas 4 to 6 ft. .TUE...SE winds less than 10 kt. Seas 4 to 5 ft. .TUE NIGHT...SE winds less than 10 kt. Seas 4 to 6 ft. .WED...S winds less than 10 kt. Seas 4 to 6 ft. .WED NIGHT...S winds less than 10 kt, shifting to W after midnight. Seas 4 to 6 ft. Bahamas N of 22N .THIS AFTERNOON...E winds 10 to 20 kt. Seas 4 to 7 ft. .TONIGHT...E winds 10 to 20 kt. Seas 4 to 8 ft. .SUN...E winds 10 to 15 kt. Seas 4 to 8 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 4 to 7 ft. .MON...E winds 10 to 15 kt. Seas 3 to 6 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 15 kt. Seas 3 to 4 ft. .WED...NE winds less than 10 kt. Seas 3 to 4 ft. .WED NIGHT...NE winds 10 to 15 kt. Seas 3 ft. ATLC waters from 22N to 27N between 65W and the Bahamas .THIS AFTERNOON...NE winds 10 to 15 kt. Seas 8 to 11 ft. .TONIGHT...NE winds 10 to 15 kt. Seas 8 to 12 ft. .SUN...E winds 10 to 15 kt W of 70W, and NE less than 10 kt elsewhere. Seas 8 to 11 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 7 to 9 ft. .MON...E winds 10 to 15 kt, diminishing to less than 10 kt in the afternoon. Seas 6 to 8 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 5 to 7 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...SE winds less than 10 kt. Seas 4 to 6 ft. .WED NIGHT...SE winds less than 10 kt. Seas 5 to 6 ft. ATLC waters S of 22N W of 65W .THIS AFTERNOON...E winds less than 10 kt. Seas 4 to 6 ft. .TONIGHT...E winds 10 to 15 kt. Seas 5 to 9 ft. .SUN...E winds 10 to 15 kt. Seas 5 to 9 ft. .SUN NIGHT...E winds less than 10 kt, increasing to 10 to 15 kt after midnight. Seas 5 to 8 ft. .MON...E winds 10 to 15 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 4 to 6 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 3 to 5 ft. ATLC waters from 19N to 22N between 55W and 65W .THIS AFTERNOON...SW winds less than 10 kt. Seas 5 to 7 ft. .TONIGHT...Variable winds less than 10 kt, becoming SE less than 10 kt after midnight. Seas 5 to 9 ft. .SUN...E winds less than 10 kt. Seas 7 to 10 ft. .SUN NIGHT...E winds 10 to 15 kt. Seas 8 to 10 ft. .MON...E winds 10 to 15 kt. Seas 7 to 10 ft. .MON NIGHT...E winds 10 to 15 kt. Seas 7 to 8 ft. .TUE...E winds 10 to 15 kt. Seas 6 to 8 ft. .TUE NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft. .WED...E winds 10 to 15 kt. Seas 6 to 7 ft. .WED NIGHT...E winds 10 to 15 kt. Seas 6 to 7 ft.