795
FZUS52 KCHS 221119
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
719 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

AMZ300-230000-
719 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.

$$

AMZ330-230000-
Charleston Harbor-
719 AM EDT Fri Aug 22 2025

.TODAY...E winds 5 to 10 kt. A chance of showers and tstms early
this morning, then showers and tstms late this morning.
.TONIGHT...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.

$$

AMZ350-230000-
Waters from South Santee River to Edisto Beach SC out 20 NM-
719 AM EDT Fri Aug 22 2025

.TODAY...NE winds 5 to 10 kt, becoming E 10 to 15 kt late. Seas
2 to 3 ft, building to 3 to 4 ft this afternoon. Wave Detail: E
3 ft at 11 seconds. Tstms likely. A chance of showers early this
morning, then showers likely late this morning.
.TONIGHT...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. Wave Detail: E
3 ft at 13 seconds and SW 2 ft at 4 seconds. 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.

$$

AMZ352-230000-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
719 AM EDT Fri Aug 22 2025

.TODAY...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 this morning, then
showers with tstms likely this afternoon.
.TONIGHT...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. Wave Detail: S
2 ft at 5 seconds and E 2 ft at 14 seconds. 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.

$$

AMZ354-230000-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
719 AM EDT Fri Aug 22 2025

.TODAY...NW winds 5 kt, becoming SE this afternoon. Seas 2 to
3 ft. Wave Detail: E 3 ft at 12 seconds. A chance of tstms this
morning. Showers likely. Tstms likely this afternoon.
.TONIGHT...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. Wave Detail: E
3 ft at 13 seconds. 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.

$$

AMZ374-230000-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
719 AM EDT Fri Aug 22 2025

.TODAY...NW winds 5 kt, becoming E late this morning. 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 until late
afternoon, then tstms likely late.
.TONIGHT...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. Wave Detail: E
4 ft at 13 seconds. 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.

$$