FZUS52 KCHS 161730
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1229 PM EST Tue Dec 16 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
AMZ300-170600-
1229 PM EST Tue Dec 16 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail through Thursday before a cold front
pushes offshore Friday morning.
$$
AMZ330-170600-
Charleston Harbor-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...Variable winds 5 kt.
.TONIGHT...SW winds 5 kt, becoming NW after midnight.
.WED...NW winds 5 kt.
.WED NIGHT...Light and variable winds, becoming E 5 kt after
midnight. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt. Rain likely in the morning, then rain
with a slight chance of tstms in the afternoon.
.THU NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with
gusts to 20 kt after midnight. Rain likely with a slight chance
of tstms in the evening, then a chance of rain after midnight.
.FRI...W winds 10 to 15 kt.
.FRI NIGHT...NW winds 5 to 10 kt.
.SAT...NE winds 5 kt.
.SAT NIGHT...SW winds 5 kt.
Winds and waves higher in and near tstms.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 53 degrees.
$$
AMZ350-170600-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...NW winds 5 kt, becoming SW late. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds.
.TONIGHT...SW winds 5 kt, becoming W after midnight. Seas 2 to
3 ft. Wave Detail: E 3 ft at 10 seconds.
.WED...NW winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at
10 seconds.
.WED NIGHT...NE winds 5 kt, becoming E after midnight. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 10 seconds and SE 1 foot at
4 seconds. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft, building to 3 to 4 ft
in the afternoon. Wave Detail: SE 2 ft at 5 seconds and SE 2 ft
at 9 seconds, becoming SE 4 ft at 9 seconds and SE 3 ft at
6 seconds. Rain likely in the morning, then rain with a slight
chance of tstms in the afternoon.
.THU NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after
midnight. Seas 4 to 5 ft, building to 5 to 7 ft after midnight.
Wave Detail: SE 5 ft at 7 seconds, becoming SE 6 ft at 8 seconds.
Rain with a slight chance of tstms in the evening, then a chance
of rain after midnight.
.FRI...W winds 20 to 25 kt. Seas 5 to 7 ft. A slight chance of
rain.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 4 to 5 ft.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 kt. Seas 2 to 3 ft.
Winds and seas higher in and near tstms.
$$
AMZ352-170600-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.TONIGHT...SE winds 5 kt, becoming NE after midnight. Seas 2 to
3 ft. Wave Detail: E 3 ft at 8 seconds.
.WED...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
10 seconds.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 10 seconds. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft, building to 3 to 4 ft in the afternoon. Wave Detail:
SE 3 ft at 10 seconds, becoming SE 3 ft at 9 seconds and SE 2 ft
at 5 seconds. Rain in the morning, then rain with a slight chance
of tstms in the afternoon.
.THU NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: SE 4 ft at 8 seconds, becoming SE 5 ft at 8 seconds.
Rain likely, mainly in the evening.
.FRI...W winds 15 to 20 kt. Seas 4 to 6 ft. A slight chance of
rain.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...NE winds 5 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 kt. Seas 2 to 3 ft.
Winds and seas higher in and near tstms.
$$
AMZ354-170600-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 9 seconds.
.TONIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
10 seconds.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 10 seconds. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 10 seconds. A slight chance of
tstms in the morning. Rain.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft, building to
4 to 5 ft after midnight. Wave Detail: SE 4 ft at 9 seconds. Rain
likely, mainly in the evening.
.FRI...W winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of
rain.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 kt. Seas 2 to 3 ft.
Winds and seas higher in and near tstms.
$$
AMZ374-170600-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave
Detail: NE 5 ft at 9 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 9 seconds. A slight chance of rain.
.WED NIGHT...NE winds 5 to 10 kt, becoming SE after midnight.
Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight
chance of rain in the evening, then a chance of rain after
midnight.
.THU...SE winds 5 to 10 kt. Seas 3 to 4 ft, building to 4 to 5 ft
in the afternoon. Wave Detail: SE 4 ft at 9 seconds, becoming SE
5 ft at 9 seconds. Rain with a slight chance of tstms.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt, becoming SW
15 to 20 kt with gusts to 30 kt after midnight. Seas 4 to 5 ft,
building to 5 to 7 ft after midnight. Wave Detail: SE 5 ft at
9 seconds, becoming SE 6 ft at 8 seconds. A slight chance of
tstms. Rain likely, mainly in the evening.
.FRI...W winds 15 to 20 kt. Seas 5 to 7 ft. A slight chance of
rain.
.FRI NIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft.
.SAT...NE winds 5 to 10 kt. Seas 3 to 4 ft.
.SAT NIGHT...SW winds 5 kt. Seas 3 ft.
Winds and seas higher in and near tstms.
$$
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1229 PM EST Tue Dec 16 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
AMZ300-170600-
1229 PM EST Tue Dec 16 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail through Thursday before a cold front
pushes offshore Friday morning.
$$
AMZ330-170600-
Charleston Harbor-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...Variable winds 5 kt.
.TONIGHT...SW winds 5 kt, becoming NW after midnight.
.WED...NW winds 5 kt.
.WED NIGHT...Light and variable winds, becoming E 5 kt after
midnight. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt. Rain likely in the morning, then rain
with a slight chance of tstms in the afternoon.
.THU NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with
gusts to 20 kt after midnight. Rain likely with a slight chance
of tstms in the evening, then a chance of rain after midnight.
.FRI...W winds 10 to 15 kt.
.FRI NIGHT...NW winds 5 to 10 kt.
.SAT...NE winds 5 kt.
.SAT NIGHT...SW winds 5 kt.
Winds and waves higher in and near tstms.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 53 degrees.
$$
AMZ350-170600-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...NW winds 5 kt, becoming SW late. Seas 2 to
3 ft. Wave Detail: E 3 ft at 9 seconds.
.TONIGHT...SW winds 5 kt, becoming W after midnight. Seas 2 to
3 ft. Wave Detail: E 3 ft at 10 seconds.
.WED...NW winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at
10 seconds.
.WED NIGHT...NE winds 5 kt, becoming E after midnight. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 10 seconds and SE 1 foot at
4 seconds. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft, building to 3 to 4 ft
in the afternoon. Wave Detail: SE 2 ft at 5 seconds and SE 2 ft
at 9 seconds, becoming SE 4 ft at 9 seconds and SE 3 ft at
6 seconds. Rain likely in the morning, then rain with a slight
chance of tstms in the afternoon.
.THU NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after
midnight. Seas 4 to 5 ft, building to 5 to 7 ft after midnight.
Wave Detail: SE 5 ft at 7 seconds, becoming SE 6 ft at 8 seconds.
Rain with a slight chance of tstms in the evening, then a chance
of rain after midnight.
.FRI...W winds 20 to 25 kt. Seas 5 to 7 ft. A slight chance of
rain.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 4 to 5 ft.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 kt. Seas 2 to 3 ft.
Winds and seas higher in and near tstms.
$$
AMZ352-170600-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds.
.TONIGHT...SE winds 5 kt, becoming NE after midnight. Seas 2 to
3 ft. Wave Detail: E 3 ft at 8 seconds.
.WED...N winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
10 seconds.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 10 seconds. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft, building to 3 to 4 ft in the afternoon. Wave Detail:
SE 3 ft at 10 seconds, becoming SE 3 ft at 9 seconds and SE 2 ft
at 5 seconds. Rain in the morning, then rain with a slight chance
of tstms in the afternoon.
.THU NIGHT...S winds 10 to 15 kt, becoming SW 15 to 20 kt after
midnight. Seas 3 to 4 ft, building to 4 to 6 ft after midnight.
Wave Detail: SE 4 ft at 8 seconds, becoming SE 5 ft at 8 seconds.
Rain likely, mainly in the evening.
.FRI...W winds 15 to 20 kt. Seas 4 to 6 ft. A slight chance of
rain.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...NE winds 5 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 kt. Seas 2 to 3 ft.
Winds and seas higher in and near tstms.
$$
AMZ354-170600-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...N winds 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 9 seconds.
.TONIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds.
.WED...N winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
10 seconds.
.WED NIGHT...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 10 seconds. A chance of rain after midnight.
.THU...SE winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 10 seconds. A slight chance of
tstms in the morning. Rain.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft, building to
4 to 5 ft after midnight. Wave Detail: SE 4 ft at 9 seconds. Rain
likely, mainly in the evening.
.FRI...W winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of
rain.
.FRI NIGHT...NW winds 10 to 15 kt. Seas 3 to 4 ft.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 5 kt. Seas 2 to 3 ft.
Winds and seas higher in and near tstms.
$$
AMZ374-170600-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1230 PM EST Tue Dec 16 2025
.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 4 to 5 ft. Wave
Detail: NE 5 ft at 9 seconds.
.TONIGHT...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 9 seconds.
.WED...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 9 seconds. A slight chance of rain.
.WED NIGHT...NE winds 5 to 10 kt, becoming SE after midnight.
Seas 3 to 4 ft. Wave Detail: SE 4 ft at 9 seconds. A slight
chance of rain in the evening, then a chance of rain after
midnight.
.THU...SE winds 5 to 10 kt. Seas 3 to 4 ft, building to 4 to 5 ft
in the afternoon. Wave Detail: SE 4 ft at 9 seconds, becoming SE
5 ft at 9 seconds. Rain with a slight chance of tstms.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt, becoming SW
15 to 20 kt with gusts to 30 kt after midnight. Seas 4 to 5 ft,
building to 5 to 7 ft after midnight. Wave Detail: SE 5 ft at
9 seconds, becoming SE 6 ft at 8 seconds. A slight chance of
tstms. Rain likely, mainly in the evening.
.FRI...W winds 15 to 20 kt. Seas 5 to 7 ft. A slight chance of
rain.
.FRI NIGHT...N winds 10 to 15 kt. Seas 4 to 5 ft.
.SAT...NE winds 5 to 10 kt. Seas 3 to 4 ft.
.SAT NIGHT...SW winds 5 kt. Seas 3 ft.
Winds and seas higher in and near tstms.
$$