North Charleston, SC - Ashley River Coastal Forecast

FZUS52 KCHS 221010
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
510 AM EST Mon Dec 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

AMZ300-222300-
510 AM EST Mon Dec 22 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front will depart the region this morning. High pressure
will then prevail through the remainder of the holiday week.

$$

AMZ330-222300-
Charleston Harbor-
510 AM EST Mon Dec 22 2025

.TODAY...NE winds 10 to 15 kt.
.TONIGHT...NE winds 5 to 10 kt.
.TUE...W winds 5 to 10 kt.
.TUE NIGHT...W winds 5 kt.
.WED...NW winds 5 kt, becoming NE in the afternoon.
.WED NIGHT...E winds 5 kt.
.THU...SW winds 5 kt.
.THU NIGHT...SW winds 5 kt.
.FRI...SW winds 5 to 10 kt.
.FRI NIGHT...SW winds 10 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 54 degrees.

$$

AMZ350-222300-
Waters from South Santee River to Edisto Beach SC out 20 NM-
510 AM EST Mon Dec 22 2025

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

.TODAY...NE winds 20 to 25 kt, diminishing to 15 to 20 kt this
afternoon. Seas 5 to 7 ft. Wave Detail: E 6 ft at 8 seconds.
.TONIGHT...NE winds 10 to 15 kt with gusts to 20 kt, becoming E
5 to 10 kt after midnight. 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 9 seconds.
.TUE...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds.
.TUE NIGHT...W winds 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
9 seconds and W 2 ft at 4 seconds.
.WED...NW winds 5 to 10 kt, becoming NE in the afternoon. Seas
2 to 3 ft. Wave Detail: E 3 ft at 9 seconds and W 2 ft at
4 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
9 seconds.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...SW winds 15 to 20 kt. Seas 3 to 4 ft.
.FRI NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft.

$$

AMZ352-222300-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
510 AM EST Mon Dec 22 2025

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

.TODAY...NE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
6 ft, building to 5 to 6 ft this afternoon. Wave Detail: E 6 ft
at 7 seconds and E 2 ft at 11 seconds, becoming E 6 ft at
8 seconds.
.TONIGHT...NE winds 15 to 20 kt, diminishing to 5 to 10 kt after
midnight. 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 9 seconds.
.TUE...E winds 5 kt, becoming SW in the afternoon. Seas 3 to
4 ft. Wave Detail: E 4 ft at 9 seconds.
.TUE NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NW winds 5 to 10 kt, becoming N in the afternoon. Seas
2 to 3 ft. Wave Detail: E 3 ft at 9 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 3 ft.

$$

AMZ354-222300-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
510 AM EST Mon Dec 22 2025

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

.TODAY...NE winds 20 kt with gusts to 25 kt. Seas 4 to 6 ft,
building to 5 to 6 ft this afternoon. Wave Detail: NE 6 ft at
6 seconds and E 2 ft at 11 seconds, becoming E 6 ft at 7 seconds
and E 1 foot at 11 seconds.
.TONIGHT...NE winds 15 to 20 kt, diminishing to 5 to 10 kt after
midnight. 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 9 seconds.
.TUE...E winds 5 kt, becoming SW in the afternoon. Seas 4 to
5 ft. Wave Detail: E 5 ft at 9 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
3 ft. Wave Detail: E 3 ft at 9 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.THU...W winds 5 to 10 kt. Seas 2 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

$$

AMZ374-222300-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
510 AM EST Mon Dec 22 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...

.TODAY...NE winds 20 to 25 kt. Seas 6 to 7 ft. Wave Detail: NE
7 ft at 8 seconds.
.TONIGHT...E winds 10 to 15 kt. Seas 5 to 7 ft, subsiding to 5 to
6 ft after midnight. Wave Detail: E 7 ft at 8 seconds, becoming E
6 ft at 9 seconds.
.TUE...S winds 5 to 10 kt, becoming SW in the afternoon. Seas
5 to 6 ft. Wave Detail: E 6 ft at 9 seconds.
.TUE NIGHT...SW winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 9 seconds.
.WED...NW winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 9 seconds.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds.
.THU...W winds 5 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft.
.FRI...SW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft.

$$