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Offshore Forecast
Issued by NWS
Issued by NWS
451 FZNT33 KWBC 182056 OFFN31 Marine Weather HF Voice Broadcast NWS Ocean Prediction Center Washington DC 456 PM EDT Sun Aug 18 2024 New England continental shelf and slope waters from 25 nm offshore to the Hague Line, except to 1000 fm south of New England. Conditions given represent the highest within that period. 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. Locally higher winds and seas can be expected in and near tstms. .SYNOPSIS FOR NEW ENGLAND WATERS...A weakening ridge across the waters this evening will shift E on Mon as Tropical Storm Ernesto passes well E of the waters while restrengthening into a hurricane. Long period E swell from Ernesto will continue across the waters through Mon night. See the latest National Hurricane Center advisory on Ernesto for more information. A cold front will reach the coast Mon, and move offshore Mon night into Tue, with a weak area of low pressure developing along the front in the Gulf of Maine. The front will move E of the waters Tue night as the low lifts NE into the Gulf of Saint Lawrence. A series of weak troughs will pass E across the northern waters late Wed through Fri night while high pressure slowly builds E across the S waters. Gulf of Maine to the Hague Line .TONIGHT...S to SE winds less than 10 kt. Seas 5 to 8 ft. .MON...S winds less than 10 kt, increasing to 5 to 15 kt. Seas 6 to 9 ft. Scattered showers and tstms with vsby 1 nm or less. .MON NIGHT...S to SW winds 10 to 20 kt, becoming SW 5 to 15 kt. Seas 5 to 8 ft. Isolated showers and tstms with vsby 1 nm or less. .TUE...S to SW winds 5 to 15 kt, becoming W to NW. Seas 4 to 7 ft. Isolated showers with vsby 1 nm or less. .TUE NIGHT...NW winds 5 to 15 kt, becoming 5 to 10 kt. Seas 3 to 6 ft. .WED...W to NW winds 5 to 10 kt, becoming variable. Seas 3 to 5 ft. .WED NIGHT...SW winds less than 10 kt, becoming W. Seas 3 to 5 ft. .THU...W winds 5 to 10 kt. Seas 3 to 5 ft. .THU NIGHT...W to SW winds 5 to 15 kt. Seas 3 to 4 ft. .FRI...W winds 5 to 10 kt. Seas 3 to 4 ft. .FRI NIGHT...W to SW winds 5 to 10 kt. Seas 3 to 4 ft. Georges Bank...from the Northeast Channel to the Great South Channel including waters east of Cape Cod...to the Hague Line .TONIGHT...E to NE winds 5 to 15 kt, becoming variable. Seas 6 to 11 ft. Areas of fog with vsby 1 nm or less. .MON...S winds 5 to 15 kt, becoming S to SW 10 to 20 kt. Seas 6 to 11 ft. Scattered showers, tstms and areas of fog with vsby 1 nm or less. .MON NIGHT...S to SW winds 15 to 25 kt. Seas 5 to 9 ft. Scattered showers and tstms with vsby 1 nm or less. .TUE...SW winds 15 to 25 kt. Seas 5 to 9 ft. Scattered showers and tstms with vsby 1 nm or less. .TUE NIGHT...W to NW winds 5 to 15 kt, diminishing to less than 10 kt. Seas 4 to 8 ft. .WED...W to NW winds less than 10 kt, becoming variable. Seas 3 to 6 ft. .WED NIGHT...W to SW winds less than 10 kt, becoming W. Seas 4 to 5 ft. .THU...W winds 5 to 10 kt, becoming 5 to 15 kt. Seas 3 to 5 ft. .THU NIGHT...W to SW winds 5 to 15 kt. Seas 3 to 4 ft. .FRI...W winds 5 to 10 kt. Seas 3 to 4 ft. .FRI NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. South of New England...from the Great South Channel to Hudson Canyon including the waters south of Marthas Vineyard and Nantucket Island...out to 1000 fm .TONIGHT...SE winds 5 to 15 kt, becoming S to SE 10 to 20 kt. Seas 6 to 9 ft. Scattered showers. Scattered tstms. .MON...S winds 10 to 20 kt, becoming SW. Seas 5 to 8 ft. Isolated showers and tstms with vsby 1 nm or less. .MON NIGHT...W to SW winds 10 to 20 kt. Seas 5 to 9 ft. Scattered showers and tstms. .TUE...W to SW winds 10 to 20 kt, becoming W to NW 5 to 15 kt. Seas 4 to 8 ft. .TUE NIGHT...W to NW winds 10 to 20 kt, becoming NW 5 to 15 kt. Seas 3 to 6 ft. .WED...W to NW winds less than 10 kt. Seas 3 to 5 ft. .WED NIGHT...W winds 5 to 10 kt, becoming W to NW 10 to 15 kt. Seas 3 to 5 ft. .THU...W to NW winds 5 to 10 kt. Seas 3 to 4 ft. .THU NIGHT...W to SW winds 5 to 15 kt. Seas 3 to 4 ft. .FRI...W to NW winds less than 10 kt. Seas 3 to 4 ft. .FRI NIGHT...W to SW winds less than 10 kt. Seas 3 to 4 ft. .Forecaster Connelly. Ocean Prediction Center.