339
FZUS52 KCHS 311144
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
744 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

AMZ300-010015-
744 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.

$$

AMZ330-010015-
Charleston Harbor-
744 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT...

.TODAY...NE winds 10 to 15 kt increasing to 15 to 20 kt with
gusts to 25 kt. Waves 1 to 2 ft. A slight chance of tstms this
morning. A chance of showers. A chance of tstms this afternoon.
.TONIGHT...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 81 degrees.

$$

AMZ350-010015-
Waters from South Santee River to Edisto Beach SC out 20 NM-
744 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY EVENING...

.TODAY...NE winds 20 to 25 kt with gusts to 30 kt. Seas 4 to
5 ft, building to 4 to 6 ft this afternoon. Wave Detail: E 5 ft
at 6 seconds, becoming E 6 ft at 7 seconds. A chance of showers.
A slight chance of tstms early this morning, then a chance of
tstms late this morning.
.TONIGHT...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, becoming E 7 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 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 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 7 seconds. A slight chance of showers and tstms.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 7 seconds. 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.

$$

AMZ352-010015-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
744 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY EVENING...

.TODAY...NE winds 15 to 20 kt with gusts to 25 kt, increasing to
20 to 25 kt with gusts to 30 kt. Seas 4 to 5 ft, building to 4 to
6 ft. Wave Detail: E 4 ft at 6 seconds, becoming E 5 ft at 6
seconds. A chance of showers. A slight chance of tstms this
morning, then a chance of tstms this afternoon.
.TONIGHT...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. Wave Detail: E
4 ft at 7 seconds. 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.

$$

AMZ354-010015-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
744 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH MONDAY EVENING...

.TODAY...NE winds 15 to 20 kt with gusts to 25 kt, increasing to
20 to 25 kt this afternoon. Seas 4 to 5 ft, building to 4 to 6 ft
this afternoon. Wave Detail: E 4 ft at 6 seconds, becoming NE 5
ft at 6 seconds. A chance of showers. A slight chance of tstms
this morning, then a chance of tstms this afternoon.
.TONIGHT...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. Wave Detail: E 4 ft at 8 seconds. 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.

$$

AMZ374-010015-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
744 AM EDT Sun Aug 31 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE MONDAY NIGHT...

.TODAY...NE winds 15 to 20 kt with gusts to 25 kt, increasing to
20 to 25 kt with gusts to 30 kt this afternoon. Seas 4 to 5 ft,
building to 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 this morning, then a chance of showers and tstms this
afternoon.
.TONIGHT...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 7 ft
at 8 seconds, becoming 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. Wave Detail:
NE 5 ft at 8 seconds. 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.

$$