233
FZUS52 KCHS 042140
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
540 PM EDT Sat Oct 4 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

AMZ300-051000-
540 PM EDT Sat Oct 4 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Strong high pressure will extend across the region through the
weekend and into early next week. A strong cold front will likely
cross the area later next week.

$$

AMZ330-051000-
Charleston Harbor-
540 PM EDT Sat Oct 4 2025

.TONIGHT...NE winds 10 to 15 kt. Showers likely after midnight.
.SUN...E winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Waves 1 to 2 ft. Showers likely in the morning, then a
slight chance of showers and tstms in the afternoon.
.SUN NIGHT...NE winds 15 to 20 kt, becoming E 10 to 15 kt after
midnight. Waves 1 to 2 ft.
.MON...E winds 10 to 15 kt with gusts to 20 kt. A slight chance
of showers. A slight chance of tstms in the afternoon.
.MON NIGHT...E winds 10 to 15 kt.
.TUE...E winds 10 to 15 kt.
.TUE NIGHT...E winds 5 to 10 kt.
.WED...NE winds 5 to 10 kt.
.WED NIGHT...NE winds 10 to 15 kt.
.THU...NE winds 15 to 20 kt. Waves 1 to 2 ft. A slight chance of
showers.
.THU NIGHT...NE winds 15 to 20 kt. Waves 1 to 2 ft.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 76 degrees.

$$

AMZ350-051000-
Waters from South Santee River to Edisto Beach SC out 20 NM-
540 PM EDT Sat Oct 4 2025

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

.TONIGHT...E winds 15 to 20 kt. Seas 4 to 6 ft. Wave Detail: E
6 ft at 7 seconds and E 2 ft at 11 seconds. A slight chance of
showers late this evening. Showers likely after midnight.
.SUN...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft.
Wave Detail: E 6 ft at 8 seconds and E 2 ft at 13 seconds. A
chance of showers in the morning, then a slight chance of showers
and tstms in the afternoon.
.SUN NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
7 ft. Wave Detail: E 6 ft at 8 seconds and E 2 ft at 13 seconds.
A slight chance of showers. A slight chance of tstms after
midnight.
.MON...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft,
subsiding to 5 to 6 ft in the afternoon. Wave Detail: E 6 ft at
8 seconds and E 1 foot at 13 seconds. A slight chance of showers.
A slight chance of tstms in the afternoon.
.MON NIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt
after midnight. Seas 5 to 6 ft. Wave Detail: E 6 ft at 8 seconds
and E 1 foot at 13 seconds.
.TUE...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 8 seconds.
.TUE NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 4 to 5 ft.
.WED...NE winds 10 to 15 kt. Seas 4 ft.
.WED NIGHT...E winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance
of showers.
.THU...NE winds 25 to 30 kt. Seas 5 to 7 ft. A slight chance of
showers.
.THU NIGHT...NE winds 25 to 30 kt. Seas 6 to 8 ft. A slight
chance of showers.

Winds and seas higher in and near tstms.

$$

AMZ352-051000-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
540 PM EDT Sat Oct 4 2025

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

.TONIGHT...E winds 20 kt, diminishing to 15 kt after midnight.
Seas 4 to 6 ft. Wave Detail: E 6 ft at 7 seconds. A slight chance
of showers this evening, then showers after midnight.
.SUN...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft.
Wave Detail: E 7 ft at 8 seconds and E 1 foot at 14 seconds.
Showers likely in the morning, then a slight chance of showers
and tstms in the afternoon.
.SUN NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
7 ft. Wave Detail: E 7 ft at 8 seconds and E 1 foot at
13 seconds. A slight chance of showers and tstms.
.MON...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to 7 ft,
subsiding to 5 to 7 ft in the afternoon. Wave Detail: E 6 ft at
8 seconds and E 1 foot at 14 seconds. A slight chance of showers
and tstms.
.MON NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
7 ft, subsiding to 5 to 6 ft after midnight. Wave Detail: E 6 ft
at 8 seconds and E 1 foot at 13 seconds, becoming E 6 ft at
8 seconds. A slight chance of showers and tstms in the evening.
.TUE...E winds 10 to 15 kt with gusts to 20 kt. Seas 5 to 6 ft,
subsiding to 4 to 5 ft in the afternoon. Wave Detail: E 6 ft at
8 seconds, becoming E 5 ft at 8 seconds.
.TUE NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 4 to 5 ft.
.WED...NE winds 10 kt. Seas 3 to 4 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft.
.THU...NE winds 20 to 25 kt. Seas 5 to 7 ft. A slight chance of
showers and tstms.
.THU NIGHT...NE winds 25 to 30 kt. Seas 6 to 8 ft. A slight
chance of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-051000-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
540 PM EDT Sat Oct 4 2025

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

.TONIGHT...E winds 15 to 20 kt. Seas 4 to 5 ft, building to 4 to
6 ft after midnight. Wave Detail: E 5 ft at 6 seconds and E 5 ft
at 12 seconds, becoming E 6 ft at 7 seconds and E 3 ft at
12 seconds. A chance of showers this evening, then showers after
midnight.
.SUN...E winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft,
building to 6 to 7 ft in the afternoon. Wave Detail: E 6 ft at
8 seconds, becoming E 7 ft at 8 seconds and E 1 foot at
14 seconds. Showers likely in the morning, then a chance of
showers and tstms in the afternoon.
.SUN NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
7 ft. Wave Detail: E 7 ft at 8 seconds and E 1 foot at
14 seconds. A slight chance of tstms. A slight chance of showers
in the evening, then a chance of showers after midnight.
.MON...E winds 15 to 20 kt. Seas 6 to 7 ft. Wave Detail: E 7 ft
at 8 seconds and E 2 ft at 14 seconds. A chance of showers with a
slight chance of tstms.
.MON NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
7 ft, subsiding to 5 to 7 ft after midnight. Wave Detail: E 7 ft
at 8 seconds and E 1 foot at 14 seconds, becoming E 7 ft at
8 seconds. A chance of showers in the evening.
.TUE...E winds 15 kt. Seas 5 to 6 ft. Wave Detail: E 6 ft at
8 seconds.
.TUE NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.WED...NE winds 10 to 15 kt. Seas 4 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 ft.
.THU...NE winds 25 to 30 kt. Seas 5 to 7 ft. A slight chance of
showers.
.THU NIGHT...NE winds 25 to 30 kt. Seas 6 to 8 ft. A slight
chance of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-051000-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
540 PM EDT Sat Oct 4 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TUESDAY NIGHT...

.TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
8 ft. Wave Detail: E 8 ft at 8 seconds and E 8 ft at 12 seconds.
A chance of showers until early morning, then showers late.
.SUN...E winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. Seas 7 to 9 ft. Wave Detail: E 9 ft at 8 seconds and E
2 ft at 13 seconds. Showers likely in the morning, then a chance
of showers with a slight chance of tstms in the afternoon.
.SUN NIGHT...E winds 20 kt with gusts to 30 kt. Seas 8 to 9 ft,
subsiding to 7 to 9 ft after midnight. Wave Detail: E 9 ft at
8 seconds and E 3 ft at 13 seconds. A chance of showers with a
slight chance of tstms.
.MON...E winds 20 kt with gusts to 25 kt. Seas 7 to 9 ft. Wave
Detail: E 9 ft at 8 seconds and E 2 ft at 13 seconds. A slight
chance of tstms in the morning. A chance of showers.
.MON NIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 7 to
9 ft. Wave Detail: E 9 ft at 8 seconds and E 2 ft at 13 seconds.
A chance of showers in the evening.
.TUE...E winds 15 kt with gusts to 20 kt. Seas 6 to 8 ft,
subsiding to 6 to 7 ft in the afternoon. Wave Detail: E 7 ft at
8 seconds and E 2 ft at 13 seconds, becoming E 7 ft at 8 seconds
and E 1 foot at 13 seconds.
.TUE NIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas 5 to
7 ft, subsiding to 5 to 6 ft after midnight.
.WED...E winds 10 to 15 kt. Seas 5 to 6 ft.
.WED NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft.
.THU...NE winds 20 to 25 kt. Seas 6 to 8 ft. A slight chance of
showers and tstms.
.THU NIGHT...NE winds 20 to 25 kt. Seas 7 to 9 ft. A slight
chance of showers and tstms.

Winds and seas higher in and near tstms.

$$