


Offshore Forecast
Issued by NWS
Issued by NWS
529 FZNT33 KWBC 312106 OFFN31 Marine Weather HF Voice Broadcast NWS Ocean Prediction Center Washington DC 506 PM EDT Thu Jul 31 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 cold front across the waters will stall south of the area tonight. Developing low pressure along the stalled front will move quickly NE away from the area Fri night into Saturday while pushing the front away from the area. High pressure will build over the area Sat and Sun then slowly weaken into Mon night. A cold front will approach from the N Mon night, briefly stall early Tue, and then lift back N as a warm front into Tue night. Gulf of Maine to the Hague Line .TONIGHT...NE winds 5 to 15 kt, increasing to 10 to 20 kt. Seas 3 to 5 ft. Scattered showers and chance of tstms. .FRI...NE winds 15 to 25 kt. Seas 3 to 5 ft. Chance of showers. .FRI NIGHT...NE winds 10 to 20 kt, becoming N 5 to 15 kt. Seas 3 to 5 ft. Chance of rain. .SAT...N winds 5 to 15 kt, diminishing to less than 10 kt. Seas 3 to 4 ft. .SAT NIGHT...W to SW winds less than 10 kt. Seas 3 to 4 ft. .SUN...SW winds less than 10 kt, increasing to 5 to 15 kt. Seas 3 to 4 ft. .SUN NIGHT...SW winds 10 to 20 kt. Seas 3 to 4 ft. .MON...SW winds 10 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...S to SW winds 5 to 15 kt, becoming SW 5 to 10 kt. Seas 3 to 4 ft. .TUE...S winds less than 10 kt, becoming variable. Seas 3 to 4 ft. .TUE 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...E to NE winds 5 to 15 kt, becoming NE 15 to 25 kt. Seas 3 to 5 ft. Scattered showers and tstms. Areas of fog with vsby 1 nm or less. .FRI...NE winds 15 to 25 kt. Seas 3 to 6 ft. Scattered showers and tstms. Areas of fog with vsby 1 nm or less. .FRI NIGHT...NE winds 15 to 25 kt. Seas 4 to 8 ft. Showers and tstms. .SAT...NE winds 20 to 30 kt. Seas 5 to 8 ft. .SAT NIGHT...NE winds 10 to 20 kt. Seas 4 to 7 ft. .SUN...NE winds 10 to 20 kt, diminishing to 5 to 15 kt. Seas 3 to 6 ft. .SUN NIGHT...S to SW winds 5 to 15 kt. Seas 3 to 5 ft. .MON...S to SW winds 5 to 10 kt, becoming S 5 to 15 kt. Seas 3 to 4 ft. .MON NIGHT...S winds 5 to 15 kt, becoming E 5 to 10 kt. Seas 3 to 4 ft. .TUE...E to NE winds 5 to 10 kt, becoming E 5 to 15 kt. Seas 3 to 4 ft. .TUE NIGHT...E winds 5 to 15 kt. Seas 3 to 5 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...S winds less than 10 kt, becoming E to NE 15 to 25 kt. Seas 3 to 6 ft. Scattered showers and tstms. Areas of fog with vsby 1 nm or less. .FRI...NE winds 20 to 30 kt. Seas 5 to 9 ft. Showers likely and scattered tstms. .FRI NIGHT...NE winds 20 to 30 kt. Seas 6 to 10 ft. Chance of rain. .SAT...NE winds 20 to 30 kt. Seas 4 to 8 ft. .SAT NIGHT...NE winds 15 to 25 kt, becoming N to NE 5 to 15 kt. Seas 4 to 7 ft. .SUN...NE winds 10 to 20 kt, becoming E to NE 5 to 15 kt. Seas 3 to 6 ft. .SUN NIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft. .MON...E to NE winds less than 10 kt. Seas 3 to 4 ft. .MON NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. .TUE...NE winds less than 10 kt, becoming E. Seas 3 to 4 ft. .TUE NIGHT...E winds 5 to 15 kt. Seas 3 to 5 ft. .Forecaster Dawson. Ocean Prediction Center.