523
FZUS52 KCHS 220544
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
144 AM EDT Fri Aug 22 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

AMZ300-221800-
144 AM EDT Fri Aug 22 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front will slowly crawl southward across the forecast area
this morning and stall over southern Georgia later today and
linger into the weekend. A much stronger cold front will clear
the area Monday with high pressure prevailing through the middle
of next week.

$$

AMZ330-221800-
Charleston Harbor-
144 AM EDT Fri Aug 22 2025

.REST OF TONIGHT...W winds 5 kt. A chance of showers and tstms,
then a slight chance of showers and tstms late.
.FRI...E winds 5 to 10 kt. Showers and tstms.
.FRI NIGHT...E winds 5 to 10 kt. Showers and tstms likely.
.SAT...E winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Showers. A chance of tstms in the morning, then tstms
likely in the afternoon.
.SAT NIGHT...E winds 5 to 10 kt. Showers with tstms likely in the
evening, then showers likely with a chance of tstms after
midnight.
.SUN...N winds 5 to 10 kt. A chance of tstms. Showers likely.
.SUN NIGHT...W winds 5 kt. Showers likely with a chance of tstms
in the evening, then a chance of showers with a slight chance of
tstms after midnight.
.MON...W winds 5 to 10 kt. A chance of showers and tstms.
.MON NIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms.
.TUE...NE winds 5 to 10 kt. A slight chance of showers and tstms.
.TUE NIGHT...NE winds 5 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 85 degrees.

$$

AMZ350-221800-
Waters from South Santee River to Edisto Beach SC out 20 NM-
144 AM EDT Fri Aug 22 2025

.REST OF TONIGHT...W winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 12 seconds. A chance of showers and tstms.
.FRI...NE winds 5 to 10 kt, becoming E 10 to 15 kt in the
afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in the
afternoon. Wave Detail: E 3 ft at 11 seconds. Showers and tstms
likely.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 7 seconds and E 3 ft at 12 seconds. Tstms likely. Showers
likely.
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 6 seconds and E 3 ft at 12 seconds. Showers with tstms likely.
.SAT NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 3 to 4 ft. Wave Detail: E 3 ft at 5 seconds and E
2 ft at 12 seconds. Showers. Tstms likely, mainly in the evening.
.SUN...N winds 5 to 10 kt, becoming NW in the afternoon. Seas
3 ft. Wave Detail: E 3 ft at 13 seconds and E 2 ft at 5 seconds.
A chance of tstms. Showers likely.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
tstms. Showers likely, mainly in the evening.
.MON...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers with a slight chance of tstms.
.TUE...NE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of
showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-221800-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
144 AM EDT Fri Aug 22 2025

.REST OF TONIGHT...W winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 12 seconds. A chance of showers and tstms, then a slight
chance of showers and tstms late.
.FRI...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
12 seconds. A chance of showers and tstms in the morning, then
showers with tstms likely in the afternoon.
.FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 11 seconds and SE 2 ft at 7 seconds. Showers with tstms
likely in the evening, then showers likely with a chance of tstms
after midnight.
.SAT...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
13 seconds and SE 1 foot at 8 seconds. Showers with a chance of
tstms in the morning, then showers with tstms likely in the
afternoon.
.SAT NIGHT...E winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft
at 12 seconds and E 2 ft at 6 seconds. Showers with tstms likely
in the evening, then showers with a chance of tstms after
midnight.
.SUN...N winds 5 kt, becoming W in the afternoon. Seas 2 to 3 ft.
Wave Detail: E 2 ft at 6 seconds and E 2 ft at 12 seconds.
Showers likely with a chance of tstms.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
tstms. Showers likely, mainly in the evening.
.MON...W winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-221800-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
144 AM EDT Fri Aug 22 2025

.REST OF TONIGHT...SW winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 12 seconds. A slight chance of showers and tstms, then a
chance of showers and tstms late.
.FRI...N winds 5 kt, becoming SE in the afternoon. Seas 2 to
3 ft. Wave Detail: E 3 ft at 12 seconds. Showers likely. A chance
of tstms in the morning, then tstms likely in the afternoon.
.FRI NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 11 seconds and SE 1 foot at 8 seconds. Showers with tstms
likely in the evening, then showers likely with a chance of tstms
after midnight.
.SAT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
13 seconds and SE 1 foot at 8 seconds. Showers with a chance of
tstms in the morning, then showers with tstms likely in the
afternoon. Vsby 1 to 3 NM in the morning.
.SAT NIGHT...E winds 5 to 10 kt, becoming W after midnight. Seas
3 ft. Wave Detail: E 3 ft at 13 seconds and SE 1 foot at
5 seconds. Showers with tstms likely in the evening, then showers
likely with a chance of tstms after midnight.
.SUN...W winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
12 seconds. Showers likely with a chance of tstms.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
tstms. Showers likely, mainly in the evening.
.MON...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.
.TUE...N winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-221800-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
144 AM EDT Fri Aug 22 2025

.REST OF TONIGHT...SW winds 5 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 12 seconds. A slight chance of showers and tstms, then a
chance of showers and tstms late.
.FRI...NE winds 5 kt, becoming SE in the afternoon. Seas 4 to
5 ft. Wave Detail: E 5 ft at 12 seconds and SE 1 foot at
8 seconds. Showers likely. A chance of tstms in the morning, then
tstms likely in the afternoon.
.FRI NIGHT...E winds 10 kt, diminishing to 5 kt after midnight.
Seas 4 to 5 ft. Wave Detail: E 5 ft at 11 seconds and SE 1 foot
at 8 seconds. Showers and tstms likely in the evening, then
showers likely with a chance of tstms after midnight with vsby
1 to 3 NM.
.SAT...E winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at
12 seconds and SE 1 foot at 8 seconds. Showers with a chance of
tstms.
.SAT NIGHT...E winds 5 to 10 kt, becoming SW after midnight. Seas
4 to 5 ft. Wave Detail: E 4 ft at 12 seconds and SE 1 foot at
6 seconds. Showers with a chance of tstms.
.SUN...W winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft at
12 seconds. A chance of tstms. Showers.
.SUN NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Showers likely
with a chance of tstms.
.MON...NW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.TUE...N winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of
showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance
of showers and tstms.

Winds and seas higher in and near tstms.

$$