820
FZUS52 KCHS 310600
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
200 AM EDT Sun Aug 31 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

AMZ300-311815-
200 AM EDT Sun Aug 31 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will extend across the area through mid week while
a stationary front lingers just off the coast. A cold front will
move through Thursday night or Friday.

$$

AMZ330-311815-
Charleston Harbor-
200 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM EDT THIS MORNING
THROUGH LATE TONIGHT...

.REST OF TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt. A
chance of showers with a slight chance of tstms.
.SUN...NE winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
to 25 kt. 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.
.MON...NE winds 15 kt with gusts to 20 kt.
.MON NIGHT...NE winds 10 to 15 kt.
.TUE...NE winds 10 to 15 kt.
.TUE NIGHT...NE winds 5 to 10 kt.
.WED...NE winds 10 to 15 kt. A chance of showers and tstms.
.WED NIGHT...E winds 5 to 10 kt. A slight chance of showers and
tstms.
.THU...E winds 5 to 10 kt. A chance of showers and tstms.
.THU 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 82 degrees.

$$

AMZ350-311815-
Waters from South Santee River to Edisto Beach SC out 20 NM-
200 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH MONDAY EVENING...

.REST OF TONIGHT...E winds 15 to 20 kt. Seas 4 ft. Wave Detail: E
4 ft at 5 seconds. A chance of showers with a slight chance of
tstms.
.SUN...NE winds 20 to 25 kt with gusts to 30 kt. Seas 4 to 5 ft,
building to 4 to 6 ft in the afternoon. Wave Detail: E 5 ft at
6 seconds, becoming NE 4 ft at 5 seconds. A chance of showers and
tstms.
.SUN NIGHT...NE winds 20 to 25 kt with gusts to 30 kt. Seas 5 to
7 ft, building to 6 to 7 ft after midnight. Wave Detail: E 6 ft
at 7 seconds. A slight chance of showers.
.MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 5 to 7 ft, subsiding to 5 to 6 ft in the
afternoon. Wave Detail: E 6 ft at 7 seconds, becoming E 6 ft at
8 seconds. A slight chance of showers and tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 4 to 6 ft, subsiding to
4 to 5 ft after midnight. Wave Detail: E 5 ft at 8 seconds,
becoming E 5 ft at 7 seconds. A slight chance of showers and
tstms.
.TUE...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 7 seconds. A slight chance of showers and tstms.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. A slight
chance of showers and tstms.
.WED...NE winds 10 to 15 kt. Seas 3 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.THU...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.THU 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.

$$

AMZ352-311815-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
200 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH MONDAY EVENING...

.REST OF TONIGHT...NE winds 15 to 20 kt. Seas 4 ft. Wave Detail:
E 4 ft at 6 seconds. A chance of showers with a slight chance of
tstms.
.SUN...NE winds 15 to 20 kt with gusts to 25 kt, increasing to 20
to 25 kt with gusts to 30 kt in the afternoon. Seas 4 to 5 ft,
building to 4 to 6 ft in the afternoon. Wave Detail: E 4 ft at 6
seconds, becoming E 6 ft at 6 seconds. A chance of showers. A
slight chance of tstms in the morning, then a chance of tstms in
the afternoon.
.SUN NIGHT...NE winds 20 to 25 kt with gusts to 30 kt. Seas 5 to
6 ft. Wave Detail: E 6 ft at 7 seconds. A slight chance of tstms
in the evening. A slight chance of showers.
.MON...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft,
subsiding to 4 to 6 ft in the afternoon. Wave Detail: E 6 ft at
7 seconds, becoming E 6 ft at 8 seconds. A slight chance of
showers and tstms.
.MON NIGHT...NE winds 15 kt with gusts to 20 kt. Seas 4 to 5 ft.
Wave Detail: E 5 ft at 8 seconds. A slight chance of showers and
tstms.
.TUE...NE winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 5 ft.
Wave Detail: E 4 ft at 8 seconds. A slight chance of showers and
tstms.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. A slight
chance of showers and tstms.
.WED...NE winds 10 kt. Seas 3 to 4 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.THU...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.THU 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.

$$

AMZ354-311815-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
200 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH MONDAY EVENING...

.REST OF TONIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 5 seconds and SE 1 foot at 8 seconds. A chance
of showers with a slight chance of tstms.
.SUN...NE winds 15 to 20 kt with gusts to 25 kt, increasing to 20
to 25 kt in the afternoon. Seas 4 to 5 ft, building to 4 to 6 ft.
Wave Detail: E 4 ft at 6 seconds, becoming NE 5 ft at 6 seconds.
A chance of showers. A slight chance of tstms in the morning, then
a chance of tstms in the afternoon.
.SUN NIGHT...NE winds 20 to 25 kt. Seas 5 to 6 ft. Wave Detail: E
6 ft at 6 seconds. A chance of showers and tstms, mainly in the
evening.
.MON...NE winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 5 to 6 ft. Wave Detail: E 6 ft at 7 seconds. A
slight chance of showers and tstms.
.MON NIGHT...NE winds 15 to 20 kt. Seas 4 to 6 ft, subsiding to
4 to 5 ft after midnight. Wave Detail: E 6 ft at 8 seconds,
becoming E 5 ft at 8 seconds. A slight chance of showers and
tstms.
.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. A slight chance of showers and tstms.
.WED...NE winds 10 kt. Seas 3 to 4 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 ft. A chance of showers
and tstms.
.THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. A 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.

Winds and seas higher in and near tstms.

$$

AMZ374-311815-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
200 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING
THROUGH LATE MONDAY NIGHT...

.REST OF TONIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave
Detail: E 4 ft at 7 seconds. A slight chance of tstms. A chance of
showers, then showers likely late.
.SUN...NE winds 15 to 20 kt with gusts to 25 kt, increasing to 20
to 25 kt with gusts to 30 kt in the afternoon. Seas 5 to 6 ft.
Wave Detail: E 5 ft at 7 seconds, becoming NE 6 ft at 6 seconds.
Showers likely with a slight chance of tstms in the morning, then
a chance of showers and tstms in the afternoon.
.SUN NIGHT...NE winds 20 to 25 kt with gusts to 30 kt. Seas 6 to
7 ft. Wave Detail: NE 7 ft at 7 seconds. A chance of showers. A
chance of tstms, mainly in the evening.
.MON...NE winds 20 to 25 kt with gusts to 30 kt. Seas 6 to 7 ft.
Wave Detail: NE 7 ft at 7 seconds. A chance of showers and tstms.
.MON NIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to
7 ft, subsiding to 5 to 6 ft after midnight. Wave Detail: NE 6 ft
at 8 seconds. A chance of showers and tstms.
.TUE...NE winds 15 to 20 kt. Seas 5 ft. Wave Detail: NE 5 ft at
8 seconds. 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.
.WED...NE winds 10 kt. Seas 4 to 5 ft. A chance of showers and
tstms.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.THU...NE winds 5 to 10 kt. Seas 3 ft. A chance of showers and
tstms.
.THU NIGHT...S winds 5 to 10 kt. Seas 3 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$