165
FZUS52 KCHS 281039
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
639 AM EDT Thu Aug 28 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

AMZ300-282300-
639 AM EDT Thu Aug 28 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Expect dry and cool conditions as high pressure prevails through
today. Thereafter, a stationary front should remain to the south
of the region through the weekend, and cause for unsettled
conditions to begin on Friday.

$$

AMZ330-282300-
Charleston Harbor-
639 AM EDT Thu Aug 28 2025

.TODAY...E winds 5 to 10 kt.
.TONIGHT...NE winds 5 to 10 kt.
.FRI...NE winds 5 kt, becoming E in the afternoon.
.FRI NIGHT...SE winds 5 to 10 kt.
.SAT...NE winds 5 kt, becoming E in the afternoon. A slight
chance of showers and tstms in the morning, then a chance of
showers and tstms in the afternoon.
.SAT NIGHT...E winds 5 to 10 kt. A chance of showers and tstms.
.SUN...E winds 10 to 15 kt. A chance of showers and tstms.
.SUN NIGHT...NE winds 10 to 15 kt. A chance of showers and tstms.
.MON...NE winds 15 to 20 kt. Waves 1 to 2 ft. A chance of showers
and tstms.
.MON NIGHT...NE winds 10 to 15 kt. A chance of showers.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 82 degrees.

$$

AMZ350-282300-
Waters from South Santee River to Edisto Beach SC out 20 NM-
639 AM EDT Thu Aug 28 2025

.TODAY...NE winds 10 kt. Seas 2 ft. Wave Detail: NE 2 ft at
4 seconds and SE 1 foot at 9 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 9 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...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 in the
afternoon. Seas 2 ft. Wave Detail: E 2 ft at 5 seconds and SE
1 foot at 8 seconds. A slight chance of showers and tstms in the
morning, then a chance of showers and tstms in the afternoon.
.SAT NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and E 2 ft at 4 seconds. A chance of showers
and tstms.
.SUN...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers
and tstms.
.SUN NIGHT...E winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers and tstms.
.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 4 to 6 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-282300-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
639 AM EDT Thu Aug 28 2025

.TODAY...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 9 seconds. A slight chance of showers
this afternoon.
.TONIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: NE 2 ft at
5 seconds and SE 1 foot at 9 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
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. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and SE 1 foot at 8 seconds. A chance of showers and
tstms.
.SAT NIGHT...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 5 seconds and SE 1 foot at 8 seconds. A chance of showers and
tstms.
.SUN...NE winds 15 to 20 kt. Seas 3 to 4 ft. A chance of showers
and tstms.
.SUN NIGHT...E winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers and tstms.
.MON...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers
and tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-282300-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
639 AM EDT Thu Aug 28 2025

.TODAY...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 5 seconds and E 1 foot at 9 seconds. A slight chance of
showers and tstms late this morning.
.TONIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and E
1 foot at 9 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and E 1 foot at 9 seconds. A slight chance of showers
and tstms.
.FRI NIGHT...E winds 5 to 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 in the evening, then a chance of showers and
tstms after midnight.
.SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 ft. Wave Detail: E 2 ft at 5 seconds and SE
1 foot at 8 seconds. A chance of tstms. A chance of showers in
the morning, then showers likely in the afternoon.
.SAT NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E
2 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. Seas 3 to 4 ft. A chance of showers
and tstms.
.SUN NIGHT...E winds 15 to 20 kt. Seas 4 ft. A chance of showers
and tstms.
.MON...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers
and tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-282300-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
639 AM EDT Thu Aug 28 2025

.TODAY...NE winds 10 to 15 kt. Seas 3 ft. Wave Detail: NE 3 ft at
5 seconds and SE 1 foot at 9 seconds. A chance of showers with a
slight chance of tstms this morning, then a slight chance of
showers early this afternoon. A chance of showers with a slight
chance of tstms late.
.TONIGHT...NE winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
5 seconds and E 1 foot at 9 seconds. A slight chance of showers
and tstms.
.FRI...NE 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 showers
and tstms.
.FRI NIGHT...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 7 seconds. A slight chance of showers and tstms in the
evening, then a chance of showers and tstms after midnight.
.SAT...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
5 seconds and E 1 foot at 8 seconds. A chance of tstms. A chance
of showers in the morning, then showers likely in the afternoon.
.SAT NIGHT...E winds 10 to 15 kt. Seas 3 ft. Wave Detail: E 3 ft
at 5 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms.
.SUN...NE winds 15 to 20 kt. Seas 3 to 4 ft. Showers likely with
a chance of tstms.
.SUN NIGHT...E winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely
with a chance of tstms.
.MON...NE winds 15 to 20 kt. Seas 4 to 6 ft. Showers likely with
a chance of tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 5 to 6 ft. Showers likely
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$