FZUS52 KCHS 150542
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1242 AM EST Mon Dec 15 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
AMZ300-151830-
1242 AM EST Mon Dec 15 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Bitter cold conditions will prevail today through Tuesday. Dry
high pressure remains in control through Thursday before the next
cold front impacts the area Friday.
$$
AMZ330-151830-
Charleston Harbor-
1242 AM EST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves
1 to 2 ft.
.MON...N winds 10 to 15 kt with gusts to 20 kt, becoming NE 5 to
10 kt in the afternoon.
.MON NIGHT...N winds 5 kt.
.TUE...NW winds 5 kt, becoming SW in the afternoon.
.TUE NIGHT...SW winds 5 kt.
.WED...W winds 5 kt.
.WED NIGHT...E winds 5 kt.
.THU...SE winds 5 kt. A chance of showers.
.THU NIGHT...SW winds 5 to 10 kt. A chance of showers.
.FRI...NW winds 5 to 10 kt.
.FRI NIGHT...NE winds 5 to 10 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 54 degrees.
$$
AMZ350-151830-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 40 kt. Seas
6 to 8 ft. Wave Detail: NE 7 ft at 6 seconds and SE 1 foot at
10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
10 to 15 kt with gusts to 20 kt in the afternoon. Seas 5 to 7 ft,
subsiding to 4 to 6 ft in the afternoon. Wave Detail: NE 7 ft at
7 seconds and SE 2 ft at 10 seconds, becoming E 5 ft at
9 seconds.
.MON NIGHT...N winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to
3 to 4 ft after midnight. Wave Detail: E 4 ft at 10 seconds.
.TUE...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail:
E 3 ft at 10 seconds, becoming E 3 ft at 9 seconds.
.TUE NIGHT...SW winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds.
.WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 9 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. A slight chance of
showers after midnight.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers.
.FRI...NW winds 15 to 20 kt. Seas 4 to 5 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
$$
AMZ352-151830-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 35 kt. Seas
5 to 7 ft. Wave Detail: NE 6 ft at 6 seconds and SE 1 foot at 10
seconds.
.MON...NE winds 20 to 25 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the
afternoon. Wave Detail: NE 6 ft at 7 seconds and SE 1 foot at
10 seconds, becoming NE 5 ft at 6 seconds and E 5 ft at
10 seconds.
.MON NIGHT...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 10 seconds.
.TUE...NW winds 5 kt, becoming W in the afternoon. Seas 3 to
4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: E
3 ft at 9 seconds.
.TUE NIGHT...W winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.WED...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
10 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. A slight chance of
showers after midnight.
.THU...SE winds 5 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers.
.FRI...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 ft.
$$
AMZ354-151830-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 35 kt,
becoming NE. Seas 5 to 7 ft. Wave Detail: NE 7 ft at 6 seconds
and SE 1 foot at 10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
15 to 20 kt in the afternoon. Seas 5 to 7 ft, subsiding to 4 to
6 ft in the afternoon. Wave Detail: NE 7 ft at 7 seconds and SE
1 foot at 10 seconds, becoming NE 6 ft at 8 seconds.
.MON NIGHT...NE winds 10 to 15 kt, becoming N 5 to 10 kt after
midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: E 5 ft at 9 seconds, becoming E 4 ft at 9 seconds.
.TUE...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.TUE NIGHT...Variable winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.WED...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
10 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. A slight chance of
showers after midnight.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 ft. A chance of
showers.
.FRI...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 ft.
$$
AMZ374-151830-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 35 kt,
becoming NE. Seas 7 to 10 ft. Wave Detail: N 9 ft at 7 seconds
and SE 1 foot at 10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
15 to 20 kt in the afternoon. Seas 8 to 10 ft, subsiding to 7 to
9 ft in the afternoon. Wave Detail: NE 9 ft at 8 seconds and SE
1 foot at 10 seconds, becoming NE 8 ft at 8 seconds and E 7 ft at
10 seconds.
.MON NIGHT...NE winds 10 to 15 kt, becoming N 5 to 10 kt after
midnight. Seas 5 to 7 ft, subsiding to 4 to 6 ft after midnight.
Wave Detail: NE 7 ft at 9 seconds, becoming NE 5 ft at 9 seconds.
.TUE...N winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: NE 5 ft
at 10 seconds.
.TUE NIGHT...Variable winds 5 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
9 seconds. A slight chance of showers in the afternoon.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 ft. A slight chance of
showers.
.THU...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers.
.THU NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft. A chance of
showers.
.FRI...NW winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of
showers.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
$$
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1242 AM EST Mon Dec 15 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
AMZ300-151830-
1242 AM EST Mon Dec 15 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Bitter cold conditions will prevail today through Tuesday. Dry
high pressure remains in control through Thursday before the next
cold front impacts the area Friday.
$$
AMZ330-151830-
Charleston Harbor-
1242 AM EST Mon Dec 15 2025
...SMALL CRAFT ADVISORY IN EFFECT UNTIL 9 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 15 to 20 kt with gusts to 30 kt. Waves
1 to 2 ft.
.MON...N winds 10 to 15 kt with gusts to 20 kt, becoming NE 5 to
10 kt in the afternoon.
.MON NIGHT...N winds 5 kt.
.TUE...NW winds 5 kt, becoming SW in the afternoon.
.TUE NIGHT...SW winds 5 kt.
.WED...W winds 5 kt.
.WED NIGHT...E winds 5 kt.
.THU...SE winds 5 kt. A chance of showers.
.THU NIGHT...SW winds 5 to 10 kt. A chance of showers.
.FRI...NW winds 5 to 10 kt.
.FRI NIGHT...NE winds 5 to 10 kt.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 54 degrees.
$$
AMZ350-151830-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 40 kt. Seas
6 to 8 ft. Wave Detail: NE 7 ft at 6 seconds and SE 1 foot at
10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
10 to 15 kt with gusts to 20 kt in the afternoon. Seas 5 to 7 ft,
subsiding to 4 to 6 ft in the afternoon. Wave Detail: NE 7 ft at
7 seconds and SE 2 ft at 10 seconds, becoming E 5 ft at
9 seconds.
.MON NIGHT...N winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to
3 to 4 ft after midnight. Wave Detail: E 4 ft at 10 seconds.
.TUE...NW winds 5 to 10 kt, becoming W in the afternoon. Seas
3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail:
E 3 ft at 10 seconds, becoming E 3 ft at 9 seconds.
.TUE NIGHT...SW winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 9 seconds.
.WED...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 9 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. A slight chance of
showers after midnight.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. A chance of
showers.
.FRI...NW winds 15 to 20 kt. Seas 4 to 5 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
$$
AMZ352-151830-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 35 kt. Seas
5 to 7 ft. Wave Detail: NE 6 ft at 6 seconds and SE 1 foot at 10
seconds.
.MON...NE winds 20 to 25 kt, diminishing to 10 to 15 kt in the
afternoon. Seas 4 to 6 ft, subsiding to 4 to 5 ft in the
afternoon. Wave Detail: NE 6 ft at 7 seconds and SE 1 foot at
10 seconds, becoming NE 5 ft at 6 seconds and E 5 ft at
10 seconds.
.MON NIGHT...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 10 seconds.
.TUE...NW winds 5 kt, becoming W in the afternoon. Seas 3 to
4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: E
3 ft at 9 seconds.
.TUE NIGHT...W winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.WED...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
10 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. A slight chance of
showers after midnight.
.THU...SE winds 5 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers.
.FRI...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 ft.
$$
AMZ354-151830-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 35 kt,
becoming NE. Seas 5 to 7 ft. Wave Detail: NE 7 ft at 6 seconds
and SE 1 foot at 10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
15 to 20 kt in the afternoon. Seas 5 to 7 ft, subsiding to 4 to
6 ft in the afternoon. Wave Detail: NE 7 ft at 7 seconds and SE
1 foot at 10 seconds, becoming NE 6 ft at 8 seconds.
.MON NIGHT...NE winds 10 to 15 kt, becoming N 5 to 10 kt after
midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: E 5 ft at 9 seconds, becoming E 4 ft at 9 seconds.
.TUE...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
9 seconds.
.TUE NIGHT...Variable winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.WED...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
10 seconds.
.WED NIGHT...E winds 5 kt. Seas 2 to 3 ft. A slight chance of
showers after midnight.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 ft. A chance of
showers.
.FRI...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 ft.
$$
AMZ374-151830-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1242 AM EST Mon Dec 15 2025
...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
.REST OF TONIGHT...N winds 25 to 30 kt with gusts to 35 kt,
becoming NE. Seas 7 to 10 ft. Wave Detail: N 9 ft at 7 seconds
and SE 1 foot at 10 seconds.
.MON...NE winds 20 to 25 kt with gusts to 30 kt, diminishing to
15 to 20 kt in the afternoon. Seas 8 to 10 ft, subsiding to 7 to
9 ft in the afternoon. Wave Detail: NE 9 ft at 8 seconds and SE
1 foot at 10 seconds, becoming NE 8 ft at 8 seconds and E 7 ft at
10 seconds.
.MON NIGHT...NE winds 10 to 15 kt, becoming N 5 to 10 kt after
midnight. Seas 5 to 7 ft, subsiding to 4 to 6 ft after midnight.
Wave Detail: NE 7 ft at 9 seconds, becoming NE 5 ft at 9 seconds.
.TUE...N winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: NE 5 ft
at 10 seconds.
.TUE NIGHT...Variable winds 5 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...N winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
9 seconds. A slight chance of showers in the afternoon.
.WED NIGHT...E winds 5 to 10 kt. Seas 3 ft. A slight chance of
showers.
.THU...SE winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers.
.THU NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft. A chance of
showers.
.FRI...NW winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of
showers.
.FRI NIGHT...NE winds 10 to 15 kt. Seas 3 to 4 ft.
$$