FZUS52 KCHS 211123
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
723 AM EDT Wed May 21 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
AMZ300-220015-
723 AM EDT Wed May 21 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front will arrive today and push offshore early evening,
followed by high pressure through the weekend.
$$
AMZ330-220015-
Charleston Harbor-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 10 to 15 kt, increasing to 15 to 20 kt this
afternoon. A slight chance of showers and tstms this afternoon.
.TONIGHT...W winds 10 to 15 kt.
.THU...NW winds 10 to 15 kt, becoming W with gusts to 20 kt in
the afternoon.
.THU NIGHT...W winds 10 to 15 kt.
.FRI...W winds 10 kt.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight.
.SAT...NE winds 5 to 10 kt.
.SAT NIGHT...S winds 5 kt.
.SUN...S winds 10 to 15 kt.
.SUN NIGHT...S winds 10 to 15 kt. A slight chance of showers.
Winds and waves higher in and near tstms.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 78 degrees.
$$
AMZ350-220015-
Waters from South Santee River to Edisto Beach SC out 20 NM-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 15 to 20 kt. A few gusts to 25 kt are possible
mid to late afternoon. Seas 2 to 3 ft, building to 4 to 5 ft this
afternoon. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9
seconds, becoming SW 4 ft at 5 seconds and SE 2 ft at 9 seconds.
.TONIGHT...SW winds 15 to 20 kt, becoming NW after midnight. Seas
4 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: SW
4 ft at 5 seconds and SE 1 foot at 9 seconds, becoming SW 3 ft at
5 seconds and SE 1 foot at 9 seconds.
.THU...NW winds 10 to 15 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at
9 seconds.
.THU NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and
SE 2 ft at 9 seconds. A slight chance of showers and tstms after
midnight.
.FRI...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 5 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot
at 9 seconds.
.SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
Winds and seas higher in and near tstms.
$$
AMZ352-220015-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A slight chance
of showers and tstms this afternoon.
.TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
9 seconds.
.THU...NW winds 10 to 15 kt with gusts to 20 kt, becoming SW in
the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds
and SE 1 foot at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 4 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...W winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at
9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
Winds and seas higher in and near tstms.
$$
AMZ354-220015-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A
slight chance of showers and tstms late this morning. A chance of
showers with a slight chance of tstms this afternoon.
.TONIGHT...W winds 10 to 15 kt, becoming NW with gusts to 20 kt
after midnight. Seas 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 foot at 9 seconds. A slight chance of showers and tstms in
the evening.
.THU...NW winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE
1 foot at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas 2 ft. Wave Detail: W 2 ft at 4 seconds and SE
1 foot at 9 seconds.
.FRI NIGHT...W winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at
9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 15 kt. Seas 2 to 3 ft. A slight chance of
showers.
Winds and seas higher in and near tstms.
$$
AMZ374-220015-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 5 seconds and SE 2 ft at 9 seconds. A slight chance of
showers and tstms this afternoon.
.TONIGHT...SW winds 15 kt, becoming NW after midnight. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds.
A slight chance of showers and tstms in the evening.
.THU...NW winds 10 to 15 kt with gusts to 20 kt, becoming SW 5 to
10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at
4 seconds and SE 2 ft at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.
.FRI...NW winds 10 to 15 kt with gusts to 20 kt, becoming W 5 to
10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at
4 seconds and SE 2 ft at 9 seconds.
.FRI NIGHT...SW winds 10 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at
9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...S winds 10 kt. Seas 2 to 3 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
Winds and seas higher in and near tstms.
$$
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
723 AM EDT Wed May 21 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
AMZ300-220015-
723 AM EDT Wed May 21 2025
.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front will arrive today and push offshore early evening,
followed by high pressure through the weekend.
$$
AMZ330-220015-
Charleston Harbor-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 10 to 15 kt, increasing to 15 to 20 kt this
afternoon. A slight chance of showers and tstms this afternoon.
.TONIGHT...W winds 10 to 15 kt.
.THU...NW winds 10 to 15 kt, becoming W with gusts to 20 kt in
the afternoon.
.THU NIGHT...W winds 10 to 15 kt.
.FRI...W winds 10 kt.
.FRI NIGHT...W winds 5 to 10 kt, becoming NW after midnight.
.SAT...NE winds 5 to 10 kt.
.SAT NIGHT...S winds 5 kt.
.SUN...S winds 10 to 15 kt.
.SUN NIGHT...S winds 10 to 15 kt. A slight chance of showers.
Winds and waves higher in and near tstms.
Unless otherwise noted, waves 1 foot or less.
Charleston Harbor water temperature 78 degrees.
$$
AMZ350-220015-
Waters from South Santee River to Edisto Beach SC out 20 NM-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 15 to 20 kt. A few gusts to 25 kt are possible
mid to late afternoon. Seas 2 to 3 ft, building to 4 to 5 ft this
afternoon. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9
seconds, becoming SW 4 ft at 5 seconds and SE 2 ft at 9 seconds.
.TONIGHT...SW winds 15 to 20 kt, becoming NW after midnight. Seas
4 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: SW
4 ft at 5 seconds and SE 1 foot at 9 seconds, becoming SW 3 ft at
5 seconds and SE 1 foot at 9 seconds.
.THU...NW winds 10 to 15 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at
9 seconds.
.THU NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and
SE 2 ft at 9 seconds. A slight chance of showers and tstms after
midnight.
.FRI...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 5 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...W winds 10 to 15 kt, becoming NW after midnight.
Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot
at 9 seconds.
.SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
Winds and seas higher in and near tstms.
$$
AMZ352-220015-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A slight chance
of showers and tstms this afternoon.
.TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
9 seconds.
.THU...NW winds 10 to 15 kt with gusts to 20 kt, becoming SW in
the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds
and SE 1 foot at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft
at 4 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...W winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at
9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
Winds and seas higher in and near tstms.
$$
AMZ354-220015-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.
Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds. A
slight chance of showers and tstms late this morning. A chance of
showers with a slight chance of tstms this afternoon.
.TONIGHT...W winds 10 to 15 kt, becoming NW with gusts to 20 kt
after midnight. Seas 2 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 1 foot at 9 seconds. A slight chance of showers and tstms in
the evening.
.THU...NW winds 10 to 15 kt, becoming SW 5 to 10 kt in the
afternoon. Seas 2 ft. Wave Detail: NW 2 ft at 3 seconds and SE
1 foot at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI...NW winds 10 to 15 kt, becoming W 5 to 10 kt in the
afternoon. Seas 2 ft. Wave Detail: W 2 ft at 4 seconds and SE
1 foot at 9 seconds.
.FRI NIGHT...W winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at
9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 15 kt. Seas 2 to 3 ft. A slight chance of
showers.
Winds and seas higher in and near tstms.
$$
AMZ374-220015-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
723 AM EDT Wed May 21 2025
.TODAY...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 5 seconds and SE 2 ft at 9 seconds. A slight chance of
showers and tstms this afternoon.
.TONIGHT...SW winds 15 kt, becoming NW after midnight. Seas 2 to
3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds.
A slight chance of showers and tstms in the evening.
.THU...NW winds 10 to 15 kt with gusts to 20 kt, becoming SW 5 to
10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at
4 seconds and SE 2 ft at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 4 seconds and SE 2 ft at 9 seconds.
.FRI...NW winds 10 to 15 kt with gusts to 20 kt, becoming W 5 to
10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at
4 seconds and SE 2 ft at 9 seconds.
.FRI NIGHT...SW winds 10 kt, becoming NW after midnight. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at
9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...S winds 10 kt. Seas 2 to 3 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
Winds and seas higher in and near tstms.
$$