441
FZUS52 KCHS 291700
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
100 PM EDT Fri Aug 29 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

AMZ300-300515-
100 PM EDT Fri Aug 29 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will extend across the area as a stationary front
lingers well to the south and offshore into the middle of next
week. A cold front is then anticipated to arrive late next week.

$$

AMZ330-300515-
Charleston Harbor-
100 PM EDT Fri Aug 29 2025

.THIS AFTERNOON...SE winds 5 kt.
.TONIGHT...S winds 5 kt.
.SAT...NE winds 5 kt, becoming E in the afternoon. A chance of
showers. A slight chance of tstms in the morning, then a chance
of tstms in the afternoon.
.SAT NIGHT...E winds 5 to 10 kt. A chance of showers. A chance of
tstms, mainly in the evening.
.SUN...NE winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Waves 1 to 2 ft. A chance of showers. A slight chance
of tstms in the morning, then a chance of tstms in the afternoon.
.SUN NIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Waves 1 to 2 ft. A chance of showers and tstms.
.MON...NE winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers
with a slight chance of tstms.
.MON NIGHT...NE winds 10 to 15 kt. A slight chance of showers and
tstms.
.TUE...NE winds 10 to 15 kt. A chance of showers with a slight
chance of tstms.
.TUE NIGHT...NE winds 10 to 15 kt. A chance of showers with a
slight chance of tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 82 degrees.

$$

AMZ350-300515-
Waters from South Santee River to Edisto Beach SC out 20 NM-
100 PM EDT Fri Aug 29 2025

.THIS AFTERNOON...NE winds 5 kt, becoming SE late. Seas 2 ft.
Wave Detail: E 2 ft at 5 seconds and SE 1 foot at 9 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 8 seconds.
.SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 8 seconds. A chance of showers. A
slight chance of tstms in the morning, then a chance of tstms in
the afternoon.
.SAT NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 4 seconds and SE 1 foot at
8 seconds. A chance of showers and tstms. Vsby 1 to 3 NM after
midnight.
.SUN...NE winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft,
building to 4 to 5 ft in the afternoon. Wave Detail: E 4 ft at
7 seconds, becoming E 5 ft at 6 seconds. A chance of showers and
tstms.
.SUN NIGHT...NE winds 20 kt with gusts to 25 kt. Seas 5 to 6 ft.
Wave Detail: E 6 ft at 7 seconds. A chance of showers and tstms.
.MON...NE winds 20 kt. Seas 5 to 6 ft. A chance of showers with a
slight chance of tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 5 to 6 ft. A chance of
showers with a slight chance of tstms.
.TUE...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers
with a slight chance of tstms.
.TUE NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers and tstms.
Light and variable winds
Winds and seas higher in and near tstms.

$$

AMZ352-300515-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
100 PM EDT Fri Aug 29 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E
2 ft at 5 seconds and SE 1 foot at 9 seconds.
.TONIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 1 foot
at 5 seconds and SE 1 foot at 8 seconds. A slight chance of
showers and tstms after midnight.
.SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms.
.SAT NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
8 seconds. A chance of tstms. Showers likely, mainly in the
evening.
.SUN...NE winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft,
building to 4 to 5 ft in the afternoon. Wave Detail: E 4 ft at
6 seconds. A chance of tstms. A chance of showers in the morning,
then showers likely in the afternoon.
.SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft. Wave Detail: E 5 ft at 6 seconds. A chance of tstms.
Showers likely, mainly in the evening.
.MON...NE winds 15 to 20 kt. Seas 4 to 6 ft. A chance of showers
and tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 4 to 6 ft. A chance of
showers and tstms.
.TUE...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers
and tstms.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 4 to 5 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-300515-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
100 PM EDT Fri Aug 29 2025

.THIS AFTERNOON...E winds 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 5 seconds and SE 1 foot at 9 seconds. A slight chance of
showers and tstms.
.TONIGHT...SE winds 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 9 seconds. A slight chance of showers
in the evening, then a chance of showers with a slight chance of
tstms after midnight.
.SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt with gusts
to 20 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms in the morning, then showers with tstms likely in
the afternoon.
.SAT NIGHT...E winds 15 kt with gusts to 20 kt. Seas 3 ft. Wave
Detail: E 3 ft at 4 seconds and SE 1 foot at 8 seconds. Showers
likely. Tstms likely, mainly in the evening.
.SUN...NE winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 6 seconds. Showers likely with a chance of tstms.
.SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft. Wave Detail: E 5 ft at 6 seconds. A chance of tstms.
Showers likely, mainly in the evening.
.MON...NE winds 20 kt. Seas 4 to 6 ft. A chance of showers and
tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 5 to 6 ft. A chance of
showers and tstms.
.TUE...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers
and tstms.
.TUE NIGHT...E winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-300515-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
100 PM EDT Fri Aug 29 2025

.THIS AFTERNOON...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 6 seconds and SE 1 foot at 9 seconds. A slight chance of
tstms. A chance of showers early, then a slight chance of showers
late.
.TONIGHT...SE winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 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.
.SAT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 5 seconds and SE 2 ft at 8 seconds. Tstms likely. Showers.
.SAT NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: E 3 ft at 5 seconds and SE 1 foot at
8 seconds. Showers. Tstms likely, mainly in the evening.
.SUN...NE winds 15 to 20 kt. Seas 3 to 4 ft, building to 4 to
5 ft in the afternoon. Wave Detail: E 4 ft at 6 seconds, becoming
E 5 ft at 7 seconds. A chance of tstms. Showers.
.SUN NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft. Wave Detail: E 5 ft at 7 seconds. Showers and tstms likely.
.MON...NE winds 20 kt. Seas 5 to 7 ft. Showers likely with a
chance of tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 5 to 7 ft. A chance of
showers and tstms.
.TUE...NE winds 15 to 20 kt. Seas 5 to 6 ft. A chance of showers
and tstms.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 4 to 6 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$