Offshore Forecast
Issued by NWS

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070
FZNT23 KWNM 200323
OFFN01

NAVTEX Marine Forecast for NE US waters
NWS Ocean Prediction Center Washington DC
1123 PM EDT Tue Aug 19 2025

Conditions given represent the highest within that period.

Locally higher winds and seas can be expected in and near tstms.

...Please refer to Coastal Waters Forecasts (CWF) available
through NOAA Weather Radio and other means for detailed coastal
waters forecasts...

.SYNOPSIS...High pressure over the region will gradually shift E
of the area tonight through Wed night. The center of Hurricane
Erin is expected to pass NE through the Outer Mid- Atlantic
Waters Thu night into Fri, remaining S of the waters. Tropical
storm conditions are expected to cover nearly all of the waters
along and S of Georges Bank late Thu through Fri.. Erin will move
farther away from the area Fri night into Sat. Long period S
swell from Hurricane Erin will continue through Thu night before
backing to the SE and E Fri night. A high pressure ridge will
move E across the waters Fri night and Sat, then shift E of the
area Sat night into Sun. A cold front will near the region from
the W by Sun night. For more information on Hurricane Erin,
please closely monitor the latest forecasts from the National
Hurricane Center.

Eastport Maine to Cape Cod

...TROPICAL STORM CONDITIONS POSSIBLE THU NIGHT...

.TONIGHT...Variable winds less than 10 kt. Seas 3 to 5 ft.
.WED...E to SE winds 5 to 15 kt. Seas 4 to 6 ft.
.WED NIGHT...E winds 5 to 15 kt. Seas 4 to 7 ft. Chance of
showers.
.THU...E winds 15 to 25 kt. Seas 7 to 12 ft. Chance of rain.
.THU NIGHT...NE winds 25 to 35 kt. Seas 11 to 19 ft.
.FRI...N winds 25 to 35 kt. Seas 16 to 22 ft.
.FRI NIGHT...N winds 20 to 30 kt. Seas 12 to 20 ft.
.SAT...S winds 10 to 20 kt. Seas 7 to 12 ft.
.SAT NIGHT...S winds 10 to 20 kt. Seas 5 to 8 ft.
.SUN...S winds 10 to 20 kt. Seas 5 to 7 ft.
.SUN NIGHT...S winds 10 to 20 kt. Seas 4 to 6 ft.

Cape Cod to Nantucket Shoals and Georges Bank

...TROPICAL STORM WARNING...
...HURRICANE CONDITIONS POSSIBLE THU NIGHT...

.TONIGHT...E winds 5 to 15 kt. Seas 6 to 9 ft.
.WED...E winds 10 to 20 kt. Seas 6 to 10 ft.
.WED NIGHT...E winds 15 to 25 kt. Seas 10 to 17 ft. Scattered
showers and tstms with vsby 1 nm or less.
.THU...E winds 30 to 40 kt. Seas 16 to 31 ft. Showers and tstms
with vsby 1 nm or less.
.THU NIGHT...E to NE winds 50 to 65 kt. Seas 26 to 41 ft.
.FRI...N winds 50 to 65 kt. Seas 26 to 41 ft.
.FRI NIGHT...N winds 30 to 40 kt. Seas 15 to 28 ft.
.SAT...N to NE winds 10 to 20 kt. Seas 10 to 17 ft.
.SAT NIGHT...S to SE winds 5 to 15 kt. Seas 7 to 12 ft.
.SUN...S winds 5 to 15 kt. Seas 6 to 9 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 5 to 8 ft.

South of New England

...TROPICAL STORM WARNING...

.TONIGHT...E winds 5 to 15 kt. Seas 6 to 9 ft.
.WED...E winds 10 to 20 kt. Seas 6 to 10 ft. Chance of showers.
.WED NIGHT...E winds 15 to 25 kt. Seas 10 to 17 ft. Chance of
showers and scattered tstms with vsby 1 nm or less.
.THU...NE winds 30 to 40 kt. Seas 17 to 31 ft. Showers and tstms
with vsby 1 nm or less.
.THU NIGHT...N to NE winds 40 to 50 kt. Seas 26 to 36 ft.
.FRI...N winds 30 to 40 kt. Seas 17 to 28 ft.
.FRI NIGHT...N winds 15 to 25 kt. Seas 12 to 20 ft.
.SAT...S winds 10 to 20 kt. Seas 8 to 14 ft.
.SAT NIGHT...S winds 5 to 15 kt. Seas 7 to 11 ft.
.SUN...S winds 5 to 15 kt. Seas 5 to 9 ft.
.SUN NIGHT...S winds 5 to 15 kt. Seas 5 to 8 ft.