292
FZUS52 KCHS 020547
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
147 AM EDT Tue Sep 2 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

AMZ300-021830-
147 AM EDT Tue Sep 2 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will extend across the area through late week. A
cold front will approach from the northwest late in the weekend.

$$

AMZ330-021830-
Charleston Harbor-
147 AM EDT Tue Sep 2 2025

.REST OF TONIGHT...NE winds 10 to 15 kt.
.TUE...NE winds 10 to 15 kt with gusts to 20 kt. A slight chance
of showers. A slight chance of tstms in the afternoon.
.TUE NIGHT...NE winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight.
.WED...NE winds 5 to 10 kt.
.WED NIGHT...E winds 5 to 10 kt.
.THU...E winds 5 kt, becoming SE in the afternoon.
.THU NIGHT...S winds 5 to 10 kt.
.FRI...S winds 5 to 10 kt.
.FRI NIGHT...S winds 5 to 10 kt.
.SAT...SW winds 10 to 15 kt.
.SAT NIGHT...S winds 5 to 10 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 80 degrees.

$$

AMZ350-021830-
Waters from South Santee River to Edisto Beach SC out 20 NM-
147 AM EDT Tue Sep 2 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas
4 to 5 ft. Wave Detail: E 5 ft at 8 seconds. A slight chance of
showers and tstms.
.TUE...NE winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E 5 ft
at 7 seconds. A slight chance of tstms. A chance of showers,
mainly in the morning.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after
midnight. Wave Detail: E 5 ft at 7 seconds, becoming E 4 ft at
7 seconds.
.WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 8 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds.
.THU...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...S winds 5 to 10 kt. Seas 2 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.SAT...SW winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-021830-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
147 AM EDT Tue Sep 2 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas
4 to 6 ft. Wave Detail: E 5 ft at 8 seconds. A slight chance of
showers. A slight chance of tstms late.
.TUE...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail:
E 5 ft at 8 seconds. A slight chance of showers and tstms.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to
3 to 4 ft after midnight. Wave Detail: E 5 ft at 7 seconds,
becoming E 4 ft at 7 seconds. A slight chance of showers and
tstms in the evening.
.WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 7 seconds.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds.
.THU...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds. A slight chance of showers and tstms in the morning.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...S winds 5 to 10 kt. Seas 2 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.SAT...SW winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ354-021830-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
147 AM EDT Tue Sep 2 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas
4 to 6 ft. Wave Detail: NE 4 ft at 6 seconds.
.TUE...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: NE 5 ft
at 7 seconds. A slight chance of showers and tstms in the
morning, then a chance of showers and tstms in the afternoon.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 4 to 5 ft. Wave Detail: E 5 ft at 7 seconds.
A slight chance of showers and tstms in the evening.
.WED...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 7 seconds. A slight chance of showers and tstms in the
afternoon.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds. A slight chance of showers and tstms in the
evening.
.THU...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds. A slight chance of showers and tstms.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms in the evening.
.FRI...SE winds 5 to 10 kt. Seas 2 ft.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.SAT...NE winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ374-021830-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
147 AM EDT Tue Sep 2 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas
5 to 7 ft. Wave Detail: NE 6 ft at 7 seconds. A chance of
showers. A slight chance of tstms, then a chance of tstms late.
.TUE...NE winds 20 to 25 kt. Seas 5 to 6 ft. Wave Detail: NE 6 ft
at 8 seconds. A chance of showers and tstms.
.TUE NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 5 to 6 ft, subsiding to 4 to 6 ft after
midnight. Wave Detail: NE 6 ft at 7 seconds, becoming NE 5 ft at
7 seconds. A slight chance of showers and tstms.
.WED...NE winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: NE 5 ft
at 8 seconds. A slight chance of showers and tstms.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 8 seconds. A slight chance of showers and tstms.
.THU...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
8 seconds. A slight chance of showers and tstms.
.THU NIGHT...SE winds 5 to 10 kt. Seas 3 ft. A slight chance of
showers and tstms after midnight.
.FRI...SE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...NE winds 5 kt. Seas 2 ft. A slight chance of showers and
tstms.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$