


Offshore Forecast
Issued by NWS
Issued by NWS
488 FZNT33 KWBC 220241 OFFN31 Marine Weather HF Voice Broadcast NWS Ocean Prediction Center Washington DC 1041 PM EDT Mon Jul 21 2025 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...High pressure will build in across the waters tonight through Wed, except for a trough which will be along or near the coast through Tue night. The area of high pressure will shift E and SE of the area Wed night and Thu. By late Thu night into early Fri a trough will move E to the coast and across the waters Fri and Fri night. A cold front will move slowly SE over the waters Sat and Sat night. Gulf of Maine to the Hague Line .TONIGHT...N to NW winds 10 to 20 kt, becoming 10 to 15 kt. Seas 3 to 4 ft. .TUE...N to NW winds 5 to 15 kt, becoming W to SW. Seas 3 to 4 ft. .TUE NIGHT...W to SW winds 5 to 15 kt. Seas 3 ft, becoming 2 ft or less. .WED...W to SW winds less than 10 kt, becoming S to SW. Seas 2 ft or less. .WED NIGHT...S to SW winds 10 to 20 kt. Seas 3 to 4 ft. .THU...SW winds 15 to 25 kt. Seas 3 to 5 ft. .THU NIGHT...SW winds 15 to 25 kt. Seas 4 to 7 ft. .FRI...SW winds 15 to 25 kt. Seas 4 to 7 ft. .FRI NIGHT...SW winds 15 to 25 kt, becoming W 10 to 20 kt. Seas 3 to 6 ft. .SAT...N to NE winds 5 to 15 kt, becoming NE. Seas 3 to 5 ft. .SAT NIGHT...S to SE winds less than 10 kt, becoming variable. 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...W to NW winds 5 to 15 kt, becoming N to NW. Seas 3 to 5 ft. .TUE...N winds less than 10 kt. Seas 3 to 4 ft. .TUE NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft. .WED...Variable winds less than 10 kt, becoming S to SW. Seas 2 ft or less. .WED NIGHT...S winds 5 to 15 kt, becoming SW. Seas 3 to 4 ft. .THU...S to SW winds 15 to 25 kt. Seas 3 to 5 ft. .THU NIGHT...SW winds 15 to 25 kt. Seas 3 to 6 ft. .FRI...SW winds 15 to 25 kt. Seas 3 to 6 ft. .FRI NIGHT...SW winds 15 to 25 kt. Seas 3 to 6 ft. .SAT...SW winds 5 to 15 kt. Seas 3 to 5 ft. .SAT NIGHT...SW winds 5 to 15 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...E to NE winds 5 to 15 kt. Seas 3 to 4 ft. Scattered showers and isolated tstms. .TUE...E to NE winds 5 to 15 kt. Seas 3 to 4 ft. Scattered showers. .TUE NIGHT...E to SE winds 5 to 15 kt, diminishing to less than 10 kt. Seas 3 to 4 ft. Scattered showers. .WED...E winds less than 10 kt, becoming S to SE. Seas 3 to 4 ft. .WED NIGHT...S winds 5 to 15 kt, becoming SW. Seas 3 to 4 ft. .THU...SW winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 3 to 4 ft. .THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. .FRI...SW winds 15 to 20 kt. Seas 3 to 5 ft. .FRI NIGHT...SW winds 15 to 25 kt. Seas 3 to 5 ft. .SAT...W to SW winds 5 to 15 kt, becoming variable. Seas 3 to 5 ft. .SAT NIGHT...Variable winds 5 to 15 kt. Seas 3 to 4 ft. .Forecaster Rowland. Ocean Prediction Center.