Offshore Forecast
Issued by NWS

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350
FZNT25 KWNM 212055
OFFN03

NAVTEX Marine Forecast for southeast U.S. waters
NWS Ocean Prediction Center Washington DC
455 PM EDT Thu Aug 21 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...Large hurricane Erin will move N and NE away from the
waters tonight through Sat. Ongoing long period SE to S swell
from Erin will slowly back to E and NE by later tonight through
Fri night before gradually subsiding Sat and Sat night. A
stationary front will form across the waters Fri and Fri night as
high pressure builds N of the waters. A weak area of low
pressure will form along the front off the South Carolina coast
Sat night, then lift NE away from the waters Sun into Sun night
while the area of high pressure to the N shifts E. A cold front
will approach the area from the W late Sun night, then move E
across the area Mon and Mon night. Another cold front or low
pressure trough will move over the region Tue and Tue night. For
more information on Hurricane Erin, please closely monitor the
latest forecasts from the National Hurricane Center.

Murrells Inlet to 31N

.TONIGHT...N to NE winds 15 to 25 kt. Seas 9 to 16 ft. Scattered
showers and chance of tstms.
.FRI...E winds 5 to 15 kt. Seas 8 to 12 ft. Scattered showers
and tstms.
.FRI NIGHT...E winds 5 to 15 kt. Seas 7 to 11 ft. Showers and
tstms likely.
.SAT...E winds 10 to 20 kt. Seas 6 to 9 ft. Scattered showers
and tstms.
.SAT NIGHT...S to SE winds 10 to 20 kt. Seas 5 to 9 ft.
.SUN...W to SW winds 5 to 15 kt. Seas 5 to 8 ft.
.SUN NIGHT...W winds 10 to 20 kt. Seas 5 to 8 ft.
.MON...W winds 10 to 20 kt. Seas 5 to 8 ft.
.MON NIGHT...W winds 5 to 15 kt. Seas 4 to 7 ft.
.TUE...Variable winds less than 10 kt. Seas 3 to 6 ft.
.TUE NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft.

South of 31N

.TONIGHT...W winds 10 to 20 kt. Seas 7 to 12 ft. Scattered
tstms.
.FRI...E to SE winds less than 10 kt. Seas 6 to 9 ft. Scattered
showers and tstms.
.FRI NIGHT...SE winds 5 to 15 kt. Seas 6 to 9 ft. Scattered
showers and tstms.
.SAT...S to SW winds less than 10 kt. Seas 5 to 8 ft. Scattered
showers and tstms.
.SAT NIGHT...W to SW winds 5 to 15 kt. Seas 5 to 8 ft.
.SUN...W winds 5 to 15 kt. Seas 5 to 7 ft.
.SUN NIGHT...W winds 5 to 15 kt. Seas 5 to 7 ft.
.MON...W winds 5 to 15 kt. Seas 5 to 7 ft.
.MON NIGHT...W winds 5 to 15 kt. Seas 4 to 7 ft.
.TUE...Variable winds 5 to 10 kt. Seas 3 to 5 ft.
.TUE NIGHT...Variable winds less than 10 kt. Seas 3 to 4 ft.