277
FZUS52 KCHS 302139
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
539 PM EDT Wed Sep 30 2026

South Santee River SC to Altamaha Sound GA out 60 NM, including
Charleston Harbor and Grays Reef National Marine Sanctuary

AMZ300-011100-
539 PM EDT Wed Sep 30 2026

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will extend across the region this week. A cold
front will push through the waters Monday, bringing increasing
winds and seas.

$$

AMZ340-011100-
Charleston Harbor-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt.
.THU...E winds 5 to 10 kt. Patchy fog in the morning.
.THU NIGHT...E winds 5 to 10 kt, becoming SE after midnight.
.FRI...NE winds 5 kt, becoming SE in the afternoon.
.FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
.SAT...SW winds 5 kt, becoming SE in the afternoon. A chance of
showers. A slight chance of tstms in the morning, then a chance
of tstms in the afternoon.
.SAT NIGHT...SE winds 5 kt. A chance of tstms. A chance of
showers in the evening, then showers likely after midnight.
.SUN...E winds 5 to 10 kt. Showers likely with a chance of tstms.
.SUN NIGHT...NE winds 5 to 10 kt. Showers likely with a slight
chance of tstms.
.MON...N winds 5 to 10 kt. Showers likely with a slight chance of
tstms.
.MON NIGHT...N winds 10 to 15 kt. A chance of showers.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 79 degrees.

$$

AMZ360-011100-
Coastal waters from South Santee River to Edisto Beach SC out
20 NM-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
4 seconds and E 1 foot at 11 seconds.
.THU...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
4 seconds and E 1 foot at 10 seconds.
.THU NIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 ft. Wave Detail: E 2 ft at 4 seconds and E 1 foot at
12 seconds.
.FRI...NE winds 5 kt, becoming SE in the afternoon. Seas 2 ft.
Wave Detail: SE 1 foot at 4 seconds and E 1 foot at 12 seconds.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 4 seconds and E 1 foot at 11 seconds. A slight chance of
showers and tstms after midnight.
.SAT...W winds 5 kt, becoming SE in the afternoon. Seas 2 ft.
Wave Detail: S 2 ft at 6 seconds and E 1 foot at 12 seconds. A
chance of showers. A slight chance of tstms in the morning, then
a chance of tstms in the afternoon.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft. A chance of tstms. A
chance of showers in the evening, then showers likely after
midnight.
.SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...NE winds 10 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.MON...N winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a
slight chance of tstms.
.MON NIGHT...NE winds 25 to 30 kt. Seas 4 to 5 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ362-011100-
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
4 seconds and E 1 foot at 12 seconds.
.THU...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
4 seconds and E 1 foot at 11 seconds.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 4 seconds and E 1 foot at 11 seconds.
.FRI...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
4 seconds and E 1 foot at 11 seconds.
.FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 ft. Wave Detail: SE 1 foot at 4 seconds and E 1 foot at
11 seconds. A chance of showers and tstms after midnight.
.SAT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
5 seconds and E 1 foot at 12 seconds. A chance of showers. A
slight chance of tstms in the morning, then a chance of tstms in
the afternoon.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft. A chance of tstms. A
chance of showers in the evening, then showers likely after
midnight.
.SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a slight chance of tstms.
.MON...N winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a
slight chance of tstms.
.MON NIGHT...NE winds 20 to 25 kt. Seas 3 to 4 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ364-011100-
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,
including Grays Reef National Marine Sanctuary-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
5 seconds and E 1 foot at 11 seconds.
.THU...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
4 seconds and E 1 foot at 11 seconds.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 4 seconds and E 1 foot at 11 seconds.
.FRI...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 1 foot at
4 seconds and E 1 foot at 11 seconds. A slight chance of showers.
A slight chance of tstms in the afternoon.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 4 seconds and E 1 foot at 11 seconds. A chance of showers and
tstms after midnight.
.SAT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
6 seconds and E 1 foot at 11 seconds. A chance of showers and
tstms.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 ft. A chance of tstms. A
chance of showers in the evening, then showers likely after
midnight.
.SUN...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...NE winds 5 to 10 kt. Seas 2 ft. Showers likely with
a slight chance of tstms.
.MON...N winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a
slight chance of tstms.
.MON NIGHT...NE winds 20 to 25 kt. Seas 3 to 4 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ380-011100-
Waters from South Santee River SC to Edisto Beach SC extending
from 20 to 60 NM-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 3 seconds and E 2 ft at 11 seconds.
.THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 4 seconds and E 2 ft at 11 seconds.
.THU NIGHT...E winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at
11 seconds.
.FRI...SE winds 5 kt. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds
and E 2 ft at 11 seconds.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 4 seconds and E 2 ft at 11 seconds. A chance of showers and
tstms after midnight.
.SAT...W winds 5 kt, becoming SE in the afternoon. Seas 2 to
3 ft. Wave Detail: S 2 ft at 6 seconds and E 2 ft at 12 seconds.
A chance of showers. A slight chance of tstms in the morning,
then a chance of tstms in the afternoon.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.SUN...SE winds 5 to 10 kt. Seas 3 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...S winds 10 kt. Seas 3 ft. Showers with a chance of
tstms.
.MON...N winds 10 to 15 kt. Seas 3 to 4 ft. Showers with a slight
chance of tstms.
.MON NIGHT...NE winds 25 to 30 kt. Seas 4 to 6 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ382-011100-
Waters from Edisto Beach SC to Savannah GA extending from 20 to
60 NM-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 4 seconds and E 2 ft at 11 seconds.
.THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 4 seconds and E 2 ft at 11 seconds.
.THU NIGHT...E winds 5 to 10 kt, becoming SE after midnight. Seas
2 to 3 ft. Wave Detail: E 2 ft at 4 seconds and E 2 ft at
11 seconds.
.FRI...SE winds 5 kt. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds
and E 2 ft at 11 seconds.
.FRI NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 2 ft at
11 seconds. A chance of showers and tstms after midnight.
.SAT...S winds 5 kt, becoming SE in the afternoon. Seas 2 to
3 ft. Wave Detail: SE 2 ft at 6 seconds and E 2 ft at 12 seconds.
A chance of showers and tstms.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.SUN...SE winds 5 to 10 kt. Seas 3 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 3 ft. Showers with a
chance of tstms.
.MON...N winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a
slight chance of tstms.
.MON NIGHT...NE winds 20 to 25 kt. Seas 4 to 6 ft. Showers likely
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ384-011100-
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM-
539 PM EDT Wed Sep 30 2026

.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 5 seconds and E 2 ft at 10 seconds.
.THU...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
4 seconds and E 2 ft at 10 seconds.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 4 seconds and E 2 ft at 11 seconds.
.FRI...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
4 seconds and E 2 ft at 11 seconds. A slight chance of showers
and tstms.
.FRI NIGHT...SE winds 5 to 10 kt, becoming S after midnight. Seas
2 to 3 ft. Wave Detail: SE 2 ft at 4 seconds and E 2 ft at
11 seconds. A chance of showers and tstms after midnight.
.SAT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 6 seconds and E 2 ft at 11 seconds. Showers likely with a
chance of tstms.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.SUN...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a
chance of tstms.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.MON...N winds 10 to 15 kt. Seas 2 to 3 ft. Showers with a slight
chance of tstms.
.MON NIGHT...NE winds 20 to 25 kt. Seas 4 to 6 ft. Showers likely
with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$