840
FZUS52 KCHS 070600
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
200 AM EDT Tue Oct 7 2025

South Santee River SC to Savannah GA out 20 NM and Savannah GA to
Altamaha Sound GA out 60 NM, including Charleston Harbor and
Grays Reef National Marine Sanctuary

AMZ300-071815-
200 AM EDT Tue Oct 7 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will persist into Wednesday. A cold front will drop
south through the area Wednesday night into Thursday with inland
high pressure prevailing into early next week. Low pressure could
develop off the Southeast U.S. coast this weekend.

$$

AMZ330-071815-
Charleston Harbor-
200 AM EDT Tue Oct 7 2025

.REST OF TONIGHT...NE winds 5 to 10 kt. A slight chance of
showers late.
.TUE...E winds 5 to 10 kt, increasing to 10 to 15 kt this
afternoon. A slight chance of showers in the morning.
.TUE NIGHT...E winds 5 to 10 kt.
.WED...Variable winds 5 kt.
.WED NIGHT...E winds 5 kt, becoming NE 10 to 15 kt with gusts to
20 kt after midnight. A chance of showers. A slight chance of
tstms after midnight.
.THU...NE winds 15 to 20 kt with gusts to 30 kt. Waves 1 to 2 ft.
A slight chance of tstms in the morning. A chance of showers.
.THU NIGHT...NE winds 20 kt with gusts to 30 kt. Waves 1 to 2 ft.
A chance of showers. A slight chance of tstms after midnight.
.FRI...NE winds 20 to 25 kt. Waves 2 to 3 ft. A chance of showers
and tstms.
.FRI NIGHT...NE winds 20 to 25 kt. Waves 2 to 3 ft. A chance of
showers.
.SAT...N winds 20 to 25 kt. Waves 2 to 3 ft. A slight chance of
showers and tstms.
.SAT NIGHT...N winds 15 to 20 kt. Waves 1 to 2 ft. A slight
chance of showers.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 76 degrees.

$$

AMZ350-071815-
Waters from South Santee River to Edisto Beach SC out 20 NM-
200 AM EDT Tue Oct 7 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: E 5 ft at 8 seconds. A slight chance of showers late.
.TUE...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft
at 8 seconds. A slight chance of showers in the morning.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: SE
5 ft at 8 seconds.
.WED...Variable winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 8 seconds.
.WED NIGHT...E winds 5 to 10 kt, becoming NE 20 to 25 kt after
midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at 8 seconds. A
chance of showers with a slight chance of tstms.
.THU...NE winds 25 to 30 kt. Seas 5 to 7 ft, building to 6 to
8 ft in the afternoon. Wave Detail: NE 6 ft at 5 seconds and SE
4 ft at 8 seconds, becoming NE 8 ft at 6 seconds. A slight chance
of tstms in the morning. A chance of showers.
.THU NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft, building to
8 to 10 ft after midnight. A chance of showers. A chance of tstms
after midnight.
.FRI...NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of showers
and tstms.
.FRI NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of
showers with a slight chance of tstms.
.SAT...N winds 25 to 30 kt. Seas 7 to 9 ft. A chance of showers
with a slight chance of tstms.
.SAT NIGHT...N winds 25 to 30 kt. Seas 6 to 8 ft. A slight chance
of showers.

Winds and seas higher in and near tstms.

$$

AMZ352-071815-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
200 AM EDT Tue Oct 7 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: E 5 ft at 8 seconds and E 1 foot at 14 seconds. A slight
chance of showers late.
.TUE...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 8 seconds. A slight chance of showers and tstms in the morning.
.TUE NIGHT...E winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: SE
5 ft at 8 seconds.
.WED...NE winds 5 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft at
8 seconds.
.WED NIGHT...E winds 5 kt, becoming NE 15 to 20 kt with gusts to
25 kt after midnight. Seas 3 to 4 ft. Wave Detail: SE 4 ft at
8 seconds. A slight chance of showers in the evening, then a
chance of showers with a slight chance of tstms after midnight.
.THU...NE winds 20 to 25 kt, increasing to 25 to 30 kt in the
afternoon. Seas 4 to 6 ft, building to 6 to 8 ft in the
afternoon. Wave Detail: NE 6 ft at 5 seconds and SE 4 ft at
8 seconds, becoming NE 8 ft at 7 seconds and E 4 ft at 8 seconds.
A chance of showers with a slight chance of tstms.
.THU NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of
showers. A slight chance of tstms in the evening, then a chance
of tstms after midnight.
.FRI...NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of showers
and tstms.
.FRI NIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of
showers.
.SAT...N winds 25 to 30 kt. Seas 6 to 8 ft. A slight chance of
showers and tstms.
.SAT NIGHT...N winds 20 to 25 kt. Seas 5 to 7 ft. A slight chance
of showers.

Winds and seas higher in and near tstms.

$$

AMZ354-071815-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
200 AM EDT Tue Oct 7 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THIS MORNING...

.REST OF TONIGHT...E winds 10 to 15 kt. Seas 4 to 6 ft. Wave
Detail: E 5 ft at 8 seconds and E 1 foot at 13 seconds.
.TUE...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 8 seconds and E 1 foot at 14 seconds. A slight chance of tstms
in the morning. A slight chance of showers.
.TUE NIGHT...E winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 8 seconds.
.WED...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 8 seconds.
.WED NIGHT...E winds 5 to 10 kt, becoming NE 10 to 15 kt with
gusts to 20 kt after midnight. Seas 3 to 4 ft. Wave Detail: E
4 ft at 8 seconds. A slight chance of showers after midnight.
.THU...NE winds 20 to 25 kt, increasing to 25 to 30 kt in the
afternoon. Seas 4 to 6 ft, building to 6 to 8 ft in the
afternoon. Wave Detail: NE 5 ft at 5 seconds and E 4 ft at
8 seconds, becoming E 8 ft at 7 seconds. A chance of showers with
a slight chance of tstms.
.THU NIGHT...NE winds 30 kt. Seas 7 to 9 ft. A chance of showers.
A slight chance of tstms in the evening, then a chance of tstms
after midnight.
.FRI...NE winds 25 to 30 kt. Seas 7 to 9 ft. A chance of showers
with a slight chance of tstms.
.FRI NIGHT...NE winds 30 kt. Seas 7 to 9 ft. A chance of showers.
.SAT...N winds 25 to 30 kt. Seas 6 to 8 ft. A slight chance of
showers.
.SAT NIGHT...N winds 20 to 25 kt. Seas 5 to 7 ft. A slight chance
of showers.

Winds and seas higher in and near tstms.

$$

AMZ374-071815-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
200 AM EDT Tue Oct 7 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.REST OF TONIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas
6 to 8 ft. Wave Detail: E 7 ft at 8 seconds and E 2 ft at
13 seconds. A slight chance of showers late.
.TUE...E winds 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: E 7 ft
at 8 seconds and E 2 ft at 13 seconds, becoming E 6 ft at 8
seconds and E 2 ft at 12 seconds. A slight chance of showers and
tstms in the morning.
.TUE NIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt after
midnight. Seas 5 to 6 ft. Wave Detail: E 6 ft at 8 seconds and E
1 foot at 12 seconds.
.WED...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 8 seconds and E 1 foot at 11 seconds.
.WED NIGHT...E winds 5 to 10 kt, becoming NE 10 to 15 kt with
gusts to 20 kt after midnight. Seas 4 to 5 ft. Wave Detail: E
4 ft at 8 seconds. A chance of showers with a slight chance of
tstms after midnight.
.THU...NE winds 20 to 25 kt, increasing to 25 to 30 kt in the
afternoon. Seas 4 to 6 ft, building to 7 to 9 ft in the
afternoon. Wave Detail: NE 6 ft at 5 seconds and E 4 ft at
8 seconds, becoming NE 9 ft at 7 seconds and E 4 ft at 8 seconds.
A chance of showers and tstms.
.THU NIGHT...NE winds 25 to 30 kt. Seas 9 to 11 ft. Showers
likely with a chance of tstms.
.FRI...NE winds 25 to 30 kt. Seas 9 to 11 ft. Showers likely with
a slight chance of tstms.
.FRI NIGHT...NE winds 25 to 30 kt. Seas 9 to 11 ft. A chance of
showers.
.SAT...N winds 25 to 30 kt. Seas 9 to 11 ft. A chance of showers
with a slight chance of tstms.
.SAT NIGHT...N winds 25 to 30 kt. Seas 8 to 10 ft. A slight
chance of showers.

Winds and seas higher in and near tstms.

$$