


Offshore Forecast
Issued by NWS
Issued by NWS
575 FZNT33 KWBC 121504 OFFN31 Marine Weather HF Voice Broadcast NWS Ocean Prediction Center Washington DC 1104 AM EDT Sun Oct 12 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...A strong coastal low will continue moving slowly N just offshore of the SE U.S. today. The low will expand, with a secondary low forming offshore of the Virginia Capes tonight. This broad, complex low will move slowly E from the Virginia Capes across the outer Mid-Atlantic waters tonight through Tue night, then finally move E of the area Wed. Mariners should monitor later forecasts on the coastal system as this will be a long duration event for the east coast, and impactful to the mariner. High pressure will build S into the eastern U.S. Wed through Thu, maintaining a strong pressure gradient across the waters. A new area of low pressure will likely form just E of the outer Mid-Atlantic waters Thu and remain nearly stationary Thu night. Gulf of Maine to the Hague Line ...GALE WARNING... .TODAY...E winds 20 to 30 kt. Seas 7 to 11 ft. Chance of rain. .TONIGHT...E winds 20 to 30 kt, increasing to 25 to 35 kt. Seas 10 to 18 ft. Rain. .MON...E winds 25 to 35 kt. Seas 11 to 19 ft. Scattered showers. .MON NIGHT...E to NE winds 20 to 30 kt. Seas 10 to 17 ft. Scattered showers. .TUE...NE winds 20 to 30 kt. Seas 7 to 13 ft. .TUE NIGHT...NE winds 15 to 25 kt, becoming N 10 to 20 kt. Seas 5 to 9 ft. .WED...N winds 10 to 15 kt, increasing to 15 to 25 kt. Seas 4 to 7 ft. .WED NIGHT...N winds 20 to 30 kt. Seas 5 to 9 ft. .THU...N winds 25 to 30 kt. Seas 6 to 11 ft. .THU NIGHT...N winds 25 to 30 kt. Seas 6 to 11 ft. Georges Bank...from the Northeast Channel to the Great South Channel including waters east of Cape Cod...to the Hague Line ...GALE WARNING... .TODAY...E winds 35 to 45 kt. Seas 13 to 22 ft. Rain. .TONIGHT...E winds 35 to 45 kt. Seas 13 to 23 ft. Rain. .MON...E winds 25 to 35 kt. Seas 15 to 21 ft. Scattered showers with vsby 1 nm or less. .MON NIGHT...E winds 20 to 30 kt. Seas 12 to 17 ft. Scattered showers and areas of fog with vsby 1 nm or less. .TUE...E to NE winds 20 to 30 kt. Seas 10 to 14 ft. .TUE NIGHT...NE winds 20 to 30 kt, becoming N. Seas 7 to 10 ft. .WED...N winds 20 to 30 kt. Seas 6 to 10 ft. .WED NIGHT...N winds 20 to 30 kt. Seas 7 to 10 ft. .THU...N winds 20 to 30 kt. Seas 9 to 12 ft. .THU NIGHT...N winds 25 to 35 kt. Seas 9 to 15 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 ...STORM WARNING... .TODAY...E winds 35 to 45 kt, becoming NE 35 to 50 kt. Seas 14 to 23 ft. Rain. .TONIGHT...E to NE winds 35 to 50 kt, becoming E 35 to 45 kt. Seas 16 to 24 ft. Rain. .MON...E winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas 13 to 20 ft. Scattered showers and areas of fog with vsby 1 nm or less. .MON NIGHT...E to NE winds 20 to 30 kt. Seas 10 to 15 ft. Scattered showers and areas of fog with vsby 1 nm or less. .TUE...N winds 20 to 30 kt. Seas 7 to 12 ft. .TUE NIGHT...N winds 20 to 30 kt. Seas 6 to 11 ft. .WED...N winds 15 to 25 kt. Seas 6 to 10 ft. .WED NIGHT...N winds 20 to 30 kt. Seas 6 to 10 ft. .THU...N winds 20 to 30 kt. Seas 7 to 12 ft. .THU NIGHT...N winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas 8 to 13 ft. .Forecaster Huffman. Ocean Prediction Center.