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New England Continental Shelf
FZNT21 KWBC 180228
OFFNT1
Offshore Waters Forecast
NWS Ocean Prediction Center Washington DC
928 PM EST Wed Dec 17 2025
New England continental shelf and slope waters from 25 nm
offshore to the Hague Line, except to 1000 fm south of New
England.
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.
ANZ898-181415-
928 PM EST Wed Dec 17 2025
.SYNOPSIS FOR NEW ENGLAND WATERS...A cold front will move SE
through the waters late tonight, followed by high pressure Thu.
The E late Thu with a warm front moving N over the area Thu
night. A strong cold front passes E across the waters Fri, with a
series of surface troughs then moving SE through the area late
Fri through early Sat. High pressure then builds in Sat, moving E
late Sat. Another warm front moves into the waters Sat night.
Another strong cold front passes over the area Sun followed by
series of surface troughs once again for Sun night and Mon. High
pressure builds E Mon night.
$$
ANZ800-181415-
Gulf of Maine to the Hague Line-
928 PM EST Wed Dec 17 2025
...GALE WARNING...
.TONIGHT...W winds 25 to 35 kt, becoming NW 20 to 30 kt. Seas
6 to 10 ft.
.THU...W to NW winds less than 10 kt, becoming S 10 to 20 kt.
Seas 5 to 8 ft.
.THU NIGHT...S winds 20 to 30 kt. Seas 5 to 9 ft.
.FRI...S winds 35 to 45 kt. Seas 8 to 12 ft, building to 12 to
18 ft. Areas of fog with vsby 1 nm or less early.
.FRI NIGHT...W winds 30 to 40 kt. Seas 12 to 20 ft.
.SAT...W winds 30 to 40 kt, diminishing to 20 to 30 kt. Seas
13 to 22 ft.
.SAT NIGHT...S to SW winds 20 to 30 kt. Seas 6 to 11 ft.
.SUN...SW winds 20 to 30 kt, becoming W. Seas 6 to 11 ft.
.SUN NIGHT...W to NW winds 25 to 35 kt. Seas 7 to 13 ft.
.MON...NW winds 25 to 35 kt. Seas 10 to 16 ft.
.MON NIGHT...NW winds 25 to 35 kt, diminishing to 20 to 30 kt.
Seas 9 to 16 ft.
$$
ANZ805-181415-
Georges Bank between Cape Cod and 68W north of 1000 FM-
928 PM EST Wed Dec 17 2025
...STORM WARNING...
.TONIGHT...W to NW winds 20 to 30 kt. Seas 6 to 10 ft.
.THU...Variable winds less than 10 kt, becoming S to SE 10 to
20 kt. Seas 5 to 8 ft.
.THU NIGHT...S winds 20 to 30 kt. Seas 4 to 7 ft.
.FRI...S winds 30 to 40 kt, increasing to 40 to 50 kt. Seas 7 to
11 ft, building to 13 to 21 ft.
.FRI NIGHT...W winds 35 to 45 kt. Seas 14 to 23 ft.
.SAT...W winds 30 to 40 kt, becoming W to NW 20 to 30 kt. Seas
14 to 23 ft.
.SAT NIGHT...SW winds 20 to 30 kt. Seas 6 to 11 ft.
.SUN...SW winds 20 to 30 kt, becoming W 20 to 25 kt. Seas 6 to
10 ft.
.SUN NIGHT...W to NW winds 25 to 35 kt. Seas 8 to 14 ft.
.MON...NW winds 25 to 35 kt. Seas 9 to 16 ft.
.MON NIGHT...NW winds 20 to 30 kt. Seas 9 to 15 ft.
$$
ANZ900-181415-
Georges Bank between 68W and the Hague Line-
928 PM EST Wed Dec 17 2025
...STORM WARNING...
.TONIGHT...W winds 25 to 35 kt, becoming W to NW 20 to 30 kt.
Seas 8 to 11 ft.
.THU...N to NW winds 5 to 15 kt, becoming S to SE 10 to 20 kt.
Seas 5 to 9 ft.
.THU NIGHT...S winds 20 to 30 kt. Seas 5 to 7 ft.
.FRI...S winds 25 to 35 kt, increasing to 35 to 50 kt. Seas 7 to
10 ft, building to 12 to 19 ft.
.FRI NIGHT...W winds 35 to 45 kt. Seas 16 to 23 ft.
.SAT...W winds 35 to 45 kt, diminishing to 20 to 30 kt. Seas
15 to 25 ft.
.SAT NIGHT...SW winds 20 to 30 kt. Seas 8 to 14 ft.
.SUN...W to SW winds 20 to 30 kt. Seas 8 to 10 ft.
.SUN NIGHT...W to NW winds 25 to 35 kt, becoming NW 25 to 30 kt.
Seas 9 to 13 ft.
.MON...NW winds 30 to 35 kt. Seas 14 to 18 ft.
.MON NIGHT...NW winds 30 to 35 kt, diminishing to 25 to 30 kt.
Seas 12 to 18 ft.
$$
ANZ810-181415-
South of New England between the Great South Channel and Montauk
Point to 1000 FM-
928 PM EST Wed Dec 17 2025
...STORM WARNING...
.TONIGHT...W winds 20 to 25 kt, becoming NW 10 to 20 kt. Seas
6 to 10 ft.
.THU...E to SE winds less than 10 kt, becoming SE 10 to 20 kt.
Seas 4 to 7 ft.
.THU NIGHT...S winds 20 to 30 kt. Seas 4 to 7 ft.
.FRI...S winds 35 to 45 kt, increasing to 40 to 50 kt. Seas 9 to
15 ft, building to 14 to 21 ft. Chance of rain.
.FRI NIGHT...W winds 30 to 40 kt. Seas 14 to 22 ft.
.SAT...W winds 25 to 35 kt, becoming W to NW 10 to 20 kt. Seas
13 to 21 ft, subsiding to 9 to 15 ft.
.SAT NIGHT...SW winds 15 to 25 kt, increasing to 25 to 35 kt.
Seas 6 to 10 ft.
.SUN...W to SW winds 25 to 35 kt, becoming W 20 to 30 kt. Seas
8 to 11 ft.
.SUN NIGHT...NW winds 30 to 40 kt. Seas 8 to 13 ft.
.MON...NW winds 25 to 35 kt. Seas 10 to 16 ft.
.MON NIGHT...NW winds 20 to 30 kt. Seas 9 to 15 ft.
$$
ANZ815-181415-
South of Long Island between Montauk Point and Sandy Hook to
1000 FM-
928 PM EST Wed Dec 17 2025
...GALE WARNING...
.TONIGHT...NW winds 15 to 25 kt, diminishing to 5 to 15 kt. Seas
4 to 8 ft.
.THU...E to SE winds 5 to 15 kt, becoming S 10 to 15 kt. Seas
3 to 6 ft.
.THU NIGHT...S winds 20 to 30 kt. Seas 4 to 5 ft, building to
5 to 9 ft.
.FRI...S winds 35 to 45 kt, becoming W 25 to 35 kt. Seas 12 to
20 ft. Rain.
.FRI NIGHT...W winds 35 to 45 kt. Seas 12 to 21 ft.
.SAT...W to NW winds 20 to 30 kt, becoming W to SW 10 to 15 kt.
Seas 11 to 17 ft, subsiding to 7 to 11 ft.
.SAT NIGHT...S to SW winds 20 to 30 kt, becoming SW 25 to 35 kt.
Seas 6 to 10 ft.
.SUN...W to SW winds 20 to 30 kt. Seas 6 to 10 ft.
.SUN NIGHT...W to NW winds 25 to 35 kt, becoming NW 25 to 30 kt.
Seas 7 to 12 ft.
.MON...NW winds 25 to 35 kt, diminishing to 20 to 30 kt. Seas
8 to 14 ft.
.MON NIGHT...NW winds 20 to 30 kt. Seas 6 to 10 ft.
$$
.Forecaster Byrd. Ocean Prediction Center.
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