424
FZUS52 KCHS 092330
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
730 PM EDT Thu Oct 9 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

AMZ300-101200-
730 PM EDT Thu Oct 9 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail inland through early next week.
Meanwhile, low pressure is expected to develop off the Southeast
coast late week into the weekend.

$$

AMZ330-101200-
Charleston Harbor-
730 PM EDT Thu Oct 9 2025

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

.TONIGHT...NE winds 15 to 20 kt with gusts to 30 kt. Waves 1 to
2 ft. A chance of showers late.
.FRI...NE winds 20 to 25 kt with gusts to 30 kt. Waves 2 to 3 ft.
A slight chance of tstms. Showers likely.
.FRI NIGHT...NE winds 20 to 25 kt, diminishing to 15 to 20 kt
after midnight. Waves 2 to 3 ft. Showers likely. A slight chance
of tstms in the evening, then a chance of tstms after midnight.
.SAT...N winds 15 to 20 kt with gusts to 30 kt. Waves 1 to 2 ft.
Showers likely with a slight chance of tstms in the morning, then
a chance of showers in the afternoon.
.SAT NIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves 1 to
2 ft. A chance of showers.
.SUN...N winds 15 kt with gusts to 25 kt. A chance of showers
with a slight chance of tstms in the morning, then a slight
chance of showers in the afternoon.
.SUN NIGHT...NW winds 10 to 15 kt. A slight chance of showers in
the evening.
.MON...W winds 10 kt.
.MON NIGHT...W winds 5 to 10 kt.
.TUE...N winds 10 kt.
.TUE NIGHT...N 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 76 degrees.

$$

AMZ350-101200-
Waters from South Santee River to Edisto Beach SC out 20 NM-
730 PM EDT Thu Oct 9 2025

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.TONIGHT...NE winds 25 to 30 kt. Seas 7 to 9 ft, building to 8 to
10 ft after midnight. Wave Detail: E 9 ft at 8 seconds, becoming
E 10 ft at 8 seconds. A slight chance of showers until early
morning. A slight chance of tstms after midnight. A chance of
showers late.
.FRI...NE winds 25 to 30 kt. Seas 8 to 10 ft. Wave Detail: E
10 ft at 9 seconds. Showers likely with a chance of tstms. Vsby
1 to 3 NM in the afternoon.
.FRI NIGHT...NE winds 25 to 30 kt. Seas 9 to 11 ft, subsiding to
8 to 10 ft after midnight. Wave Detail: E 10 ft at 9 seconds.
Showers with a chance of tstms.
.SAT...N winds 25 to 30 kt. Seas 7 to 9 ft. Wave Detail: E 9 ft
at 9 seconds. Showers with a chance of tstms in the morning, then
showers likely with a slight chance of tstms in the afternoon.
.SAT NIGHT...N winds 20 to 25 kt with gusts to 35 kt. Seas 7 to
9 ft, subsiding to 6 to 8 ft after midnight. Wave Detail: E 8 ft
at 9 seconds and SE 1 foot at 16 seconds. A chance of showers
with a slight chance of tstms.
.SUN...N winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 6 to 8 ft. Wave Detail: E 7 ft at 10 seconds and
SE 2 ft at 15 seconds. A chance of showers with a slight chance
of tstms in the morning, then a slight chance of showers in the
afternoon.
.SUN NIGHT...NW winds 15 to 20 kt with gusts to 25 kt. Seas 5 to
7 ft, subsiding to 5 to 6 ft after midnight. A slight chance of
showers in the evening.
.MON...NW winds 10 to 15 kt. Seas 4 to 6 ft.
.MON NIGHT...W winds 10 to 15 kt. Seas 4 to 5 ft.
.TUE...N winds 10 to 15 kt. Seas 4 to 5 ft.
.TUE NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft.

Winds and seas higher in and near tstms.

$$

AMZ352-101200-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
730 PM EDT Thu Oct 9 2025

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.TONIGHT...NE winds 25 to 30 kt with gusts to 40 kt. Seas 7 to
9 ft, building to 8 to 10 ft after midnight. Wave Detail: E 9 ft
at 7 seconds, becoming E 10 ft at 8 seconds. A chance of showers.
A slight chance of tstms until early morning, then a chance of
tstms late.
.FRI...NE winds 25 to 30 kt. Seas 8 to 10 ft. Wave Detail: E
10 ft at 8 seconds. A chance of showers and tstms in the morning,
then showers likely with a chance of tstms in the afternoon with
vsby 1 to 3 NM.
.FRI NIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft. Wave Detail:
E 9 ft at 8 seconds. Showers likely with a chance of tstms.
.SAT...N winds 25 kt with gusts to 35 kt. Seas 7 to 9 ft,
subsiding to 6 to 8 ft in the afternoon. Wave Detail: E 9 ft at
9 seconds, becoming E 8 ft at 9 seconds. Showers likely with a
slight chance of tstms in the morning, then a chance of showers
in the afternoon.
.SAT NIGHT...N winds 20 to 25 kt with gusts to 35 kt. Seas 6 to
8 ft. Wave Detail: E 8 ft at 9 seconds and SE 1 foot at
15 seconds. A chance of showers.
.SUN...N winds 15 to 20 kt with gusts to 30 kt. Seas 5 to 7 ft.
Wave Detail: E 6 ft at 10 seconds and SE 2 ft at 14 seconds. A
slight chance of showers.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 25 kt. Seas 5 to
6 ft, subsiding to 4 to 6 ft after midnight.
.MON...NW winds 10 to 15 kt. Seas 4 to 5 ft.
.MON NIGHT...W winds 10 to 15 kt. Seas 4 to 5 ft.
.TUE...N winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...N winds 10 to 15 kt. Seas 3 to 4 ft.

Winds and seas higher in and near tstms.

$$

AMZ354-101200-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
730 PM EDT Thu Oct 9 2025

...GALE WARNING IN EFFECT THROUGH SATURDAY EVENING...

.TONIGHT...NE winds 30 kt. Seas 7 to 9 ft, building to 8 to 9 ft
after midnight. Wave Detail: NE 9 ft at 7 seconds, becoming E
9 ft at 8 seconds. A chance of tstms. A chance of showers this
evening, then showers likely after midnight.
.FRI...NE winds 25 to 30 kt. Seas 8 to 9 ft, subsiding to 7 to
9 ft in the afternoon. Wave Detail: NE 9 ft at 8 seconds. Showers
likely with a chance of tstms.
.FRI NIGHT...NE winds 25 to 30 kt. Seas 8 to 9 ft, subsiding to
7 to 9 ft after midnight. Wave Detail: NE 9 ft at 8 seconds.
Showers likely with a chance of tstms.
.SAT...N winds 25 to 30 kt. Seas 7 to 9 ft. Wave Detail: NE 8 ft
at 9 seconds. A chance of tstms in the morning. A chance of
showers.
.SAT NIGHT...N winds 20 to 25 kt with gusts to 35 kt. Seas 6 to
8 ft. Wave Detail: NE 8 ft at 9 seconds and SE 1 foot at
16 seconds. A chance of showers, mainly in the evening.
.SUN...N winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft.
Wave Detail: NE 7 ft at 10 seconds and SE 2 ft at 15 seconds. A
slight chance of showers in the morning.
.SUN NIGHT...NW winds 10 to 15 kt. Seas 5 to 6 ft.
.MON...NW winds 10 to 15 kt. Seas 4 to 5 ft.
.MON NIGHT...W winds 10 to 15 kt. Seas 4 to 5 ft.
.TUE...N winds 10 to 15 kt. Seas 3 to 4 ft.
.TUE NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.

Winds and seas higher in and near tstms.

$$

AMZ374-101200-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
730 PM EDT Thu Oct 9 2025

...GALE WARNING IN EFFECT THROUGH LATE SATURDAY NIGHT...

.TONIGHT...NE winds 25 to 30 kt. Seas 8 to 10 ft, building to
9 to 11 ft after midnight. Wave Detail: NE 10 ft at 7 seconds,
becoming NE 10 ft at 8 seconds. A chance of tstms. Showers.
.FRI...NE winds 25 to 30 kt. Seas 9 to 10 ft. Wave Detail: NE
10 ft at 9 seconds. Showers with a chance of tstms. Vsby 1 to
3 NM.
.FRI NIGHT...NE winds 20 to 25 kt with gusts to 35 kt. Seas 9 to
10 ft. Wave Detail: NE 10 ft at 8 seconds. Showers with a chance
of tstms.
.SAT...N winds 25 to 30 kt. Seas 9 to 10 ft. Wave Detail: NE
10 ft at 10 seconds. Showers likely with a chance of tstms in the
morning, then a chance of showers with a slight chance of tstms
in the afternoon.
.SAT NIGHT...N winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 9 to 10 ft, subsiding to 8 to 10 ft after
midnight. Wave Detail: NE 9 ft at 9 seconds, becoming NE 9 ft at
10 seconds and SE 1 foot at 16 seconds. A chance of showers. A
chance of tstms, mainly in the evening.
.SUN...N winds 20 to 25 kt, diminishing to 15 to 20 kt in the
afternoon. Seas 8 to 10 ft, subsiding to 7 to 9 ft in the
afternoon. Wave Detail: NE 9 ft at 10 seconds and SE 2 ft at
15 seconds, becoming NE 8 ft at 10 seconds and SE 2 ft at
14 seconds. A slight chance of showers.
.SUN NIGHT...NW winds 10 to 15 kt with gusts to 20 kt. Seas 6 to
8 ft.
.MON...NW winds 10 to 15 kt. Seas 5 to 7 ft.
.MON NIGHT...W winds 10 to 15 kt. Seas 5 to 7 ft.
.TUE...N winds 10 to 15 kt. Seas 4 to 6 ft.
.TUE NIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft.

Winds and seas higher in and near tstms.

$$