240
FZUS52 KCHS 092140
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
440 PM EST Tue Dec 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

AMZ300-101000-
440 PM EST Tue Dec 9 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will extend across the region for much of the week.
A cold front will move through Wednesday evening and push
offshore Thursday morning with another cold front possibly moving
through very late in the weekend.

$$

AMZ330-101000-
Charleston Harbor-
440 PM EST Tue Dec 9 2025

.TONIGHT...N winds 5 kt this evening, becoming light and
variable, then becoming NW 5 kt late.
.WED...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts to
20 kt in the afternoon.
.WED NIGHT...W winds 10 to 15 kt with gusts to 25 kt.
.THU...NW winds 10 kt.
.THU NIGHT...W winds 5 to 10 kt.
.FRI...NW winds 5 kt, becoming SW in the afternoon.
.FRI NIGHT...SW winds 5 to 10 kt.
.SAT...SW winds 5 to 10 kt.
.SAT NIGHT...SW winds 5 kt.
.SUN...NW winds 5 to 10 kt.
.SUN NIGHT...N winds 10 to 15 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 55 degrees.

$$

AMZ350-101000-
Waters from South Santee River to Edisto Beach SC out 20 NM-
440 PM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

.TONIGHT...NW winds 5 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft
after midnight. Wave Detail: E 3 ft at 9 seconds, becoming E 3 ft
at 10 seconds.
.WED...W winds 10 to 15 kt, becoming SW 20 to 25 kt with gusts to
30 kt in the afternoon. Seas 2 to 3 ft, building to 4 to 5 ft in
the afternoon. Wave Detail: E 3 ft at 10 seconds, becoming SW
4 ft at 4 seconds and E 3 ft at 10 seconds.
.WED NIGHT...W winds 25 to 30 kt, diminishing to 20 to 25 kt
after midnight. Seas 4 to 6 ft. Wave Detail: SW 6 ft at 6 seconds
and E 2 ft at 10 seconds.
.THU...NW winds 15 to 20 kt, becoming W 10 to 15 kt in the
afternoon. Seas 4 to 5 ft, subsiding to 2 to 3 ft in the
afternoon. Wave Detail: W 4 ft at 6 seconds and E 2 ft at
9 seconds, becoming W 3 ft at 6 seconds and E 1 foot at
9 seconds.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W
2 ft at 5 seconds and E 1 foot at 9 seconds.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at
9 seconds.
.FRI NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to
3 ft.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 ft.
.SUN...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...N winds 20 to 25 kt. Seas 4 to 6 ft.

$$

AMZ352-101000-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
440 PM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

.TONIGHT...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds.
.WED...W winds 5 to 10 kt, becoming SW 15 to 20 kt with gusts to
25 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in
the afternoon. Wave Detail: E 3 ft at 10 seconds, becoming SW
3 ft at 4 seconds and E 3 ft at 10 seconds.
.WED NIGHT...W winds 20 to 25 kt with gusts to 30 kt. Seas 4 to
6 ft, subsiding to 4 to 5 ft after midnight. Wave Detail: SW 5 ft
at 5 seconds and E 3 ft at 10 seconds, becoming W 5 ft at
5 seconds and E 2 ft at 10 seconds.
.THU...NW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft in the afternoon. Wave Detail: W 4 ft at 5 seconds and E
2 ft at 10 seconds, becoming NW 3 ft at 4 seconds and E 1 foot at
9 seconds.
.THU NIGHT...W winds 10 to 15 kt. Seas 2 ft. Wave Detail: NW 2 ft
at 4 seconds and E 1 foot at 9 seconds.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at
9 seconds.
.FRI NIGHT...SW winds 10 kt. Seas 2 ft.
.SAT...SW winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...NW winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...NE winds 20 to 25 kt. Seas 3 to 4 ft.

$$

AMZ354-101000-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
440 PM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH LATE WEDNESDAY NIGHT...

.TONIGHT...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: NE
3 ft at 8 seconds.
.WED...W winds 5 to 10 kt, becoming SW 15 to 20 kt with gusts to
25 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in
the afternoon. Wave Detail: E 3 ft at 9 seconds, becoming SW 3 ft
at 3 seconds and E 3 ft at 10 seconds.
.WED NIGHT...W winds 15 to 20 kt with gusts to 30 kt. Seas 4 to
5 ft. Wave Detail: SW 4 ft at 5 seconds and E 3 ft at 10 seconds.
.THU...NW winds 15 kt with gusts to 20 kt, becoming W in the
afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the
afternoon. Wave Detail: W 3 ft at 4 seconds and E 2 ft at
10 seconds, becoming W 2 ft at 3 seconds and E 2 ft at
10 seconds.
.THU NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W
2 ft at 3 seconds and E 2 ft at 9 seconds.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: NW 1 foot at 3 seconds and E 1 foot at
9 seconds.
.FRI NIGHT...SW winds 10 kt. Seas 2 ft.
.SAT...SW winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 1 foot or less.
.SUN...NW winds 5 to 10 kt. Seas 2 ft.
.SUN NIGHT...N winds 20 to 25 kt. Seas 3 to 4 ft.

$$

AMZ374-101000-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
440 PM EST Tue Dec 9 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM WEDNESDAY AFTERNOON
THROUGH THURSDAY MORNING...

.TONIGHT...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: NE
4 ft at 8 seconds.
.WED...W winds 5 to 10 kt, increasing to 15 to 20 kt with gusts
to 25 kt in the afternoon. Seas 3 to 4 ft, building to 4 to 5 ft
in the afternoon. Wave Detail: E 4 ft at 10 seconds, becoming E
4 ft at 10 seconds and W 3 ft at 4 seconds.
.WED NIGHT...W winds 20 to 25 kt with gusts to 30 kt. Seas 5 to
7 ft. Wave Detail: SW 6 ft at 5 seconds and E 4 ft at 10 seconds.
.THU...NW winds 15 to 20 kt. Seas 4 to 6 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: NW 5 ft at 5 seconds and E
3 ft at 10 seconds, becoming W 4 ft at 4 seconds and E 2 ft at
9 seconds.
.THU NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to
2 to 3 ft after midnight. Wave Detail: W 3 ft at 4 seconds and E
2 ft at 9 seconds, becoming NW 3 ft at 4 seconds and E 2 ft at
9 seconds.
.FRI...NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and E 1 foot at
9 seconds.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT...W winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 ft.
.SUN...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...N winds 20 to 25 kt. Seas 4 to 5 ft.

$$