430
FZUS52 KCHS 181824
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
224 PM EDT Fri Sep 18 2026

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

AMZ300-190800-
224 PM EDT Fri Sep 18 2026

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will persist today. A weak cold front will approach
and potentially stall nearby this weekend, followed by a stronger
cold front crossing the area early to middle of next week.

$$

AMZ340-190800-
Charleston Harbor-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...S winds 5 to 10 kt.
.TONIGHT...S winds 5 kt, becoming W after midnight.
.SAT...N winds 5 kt, becoming SE in the afternoon. A chance of
showers and tstms in the afternoon.
.SAT NIGHT...E winds 5 kt, becoming NE after midnight. A chance
of showers and tstms.
.SUN...N winds 5 kt, becoming E in the afternoon. A slight chance
of showers and tstms in the morning, then a chance of showers and
tstms in the afternoon.
.SUN NIGHT...SE winds 5 kt. A chance of showers and tstms in the
evening.
.MON...NE winds 5 to 10 kt. A chance of showers and tstms.
.MON NIGHT...E winds 5 kt. Showers likely with a chance of tstms.
.TUE...NE winds 5 to 10 kt. Showers likely with a chance of
tstms.
.TUE NIGHT...NE winds 5 to 10 kt. A chance of showers and tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 84 degrees.

$$

AMZ360-190800-
Coastal waters from South Santee River to Edisto Beach SC out
20 NM-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...S winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 7 seconds and E 1 foot at 12 seconds.
.TONIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. Wave Detail: SE 2 ft at 6 seconds and E 1 foot at
12 seconds. A slight chance of showers and tstms after midnight.
.SAT...Variable winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
6 seconds and SE 1 foot at 12 seconds. A slight chance of showers
and tstms in the afternoon.
.SAT NIGHT...NE winds 5 kt. Seas 2 ft. Wave Detail: E 1 foot at
7 seconds and SE 1 foot at 12 seconds. A slight chance of showers
and tstms in the evening, then a chance of showers and tstms
after midnight.
.SUN...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
11 seconds and E 1 foot at 7 seconds. A chance of showers with a
slight chance of tstms.
.SUN NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds and SE 2 ft at 11 seconds.
.MON...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers with a
slight chance of tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 ft. Showers likely with
a chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ362-190800-
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and E 1 foot at 12 seconds.
.TONIGHT...S winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
7 seconds and E 1 foot at 12 seconds.
.SAT...Variable winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
6 seconds and E 1 foot at 12 seconds.
.SAT NIGHT...Variable winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 7 seconds and SE 1 foot at 12 seconds. A slight chance of
tstms. A slight chance of showers in the evening, then a chance
of showers after midnight.
.SUN...NE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds
and SE 1 foot at 11 seconds. A slight chance of tstms. A chance
of showers, mainly in the morning.
.SUN NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
10 seconds. A slight chance of showers and tstms.
.MON...E winds 5 kt. Seas 2 ft. A chance of showers with a slight
chance of tstms.
.MON NIGHT...E winds 5 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ364-190800-
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,
including Grays Reef National Marine Sanctuary-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 7 seconds.
.TONIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
7 seconds.
.SAT...Variable winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
7 seconds.
.SAT NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
7 seconds. A chance of showers with a slight chance of tstms
after midnight.
.SUN...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
7 seconds and SE 1 foot at 11 seconds. A chance of showers. A
slight chance of tstms in the afternoon.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds and E 1 foot at 11 seconds. A slight chance of
showers and tstms after midnight.
.MON...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ380-190800-
Waters from South Santee River SC to Edisto Beach SC extending
from 20 to 60 NM-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...Variable winds 5 kt. Seas 2 to 3 ft. Wave
Detail: E 3 ft at 7 seconds and E 1 foot at 12 seconds.
.TONIGHT...S winds 5 to 10 kt, becoming W after midnight. Seas
2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and E 1 foot at
12 seconds. A slight chance of showers and tstms after midnight.
.SAT...NW winds 5 kt, becoming NE in the afternoon. Seas 2 ft.
Wave Detail: E 2 ft at 8 seconds and SE 1 foot at 12 seconds.
.SAT NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
11 seconds and E 1 foot at 7 seconds. A slight chance of showers
and tstms in the evening, then a chance of showers and tstms
after midnight.
.SUN...NE winds 5 kt. Seas 2 ft. Wave Detail: NE 2 ft at
7 seconds and SE 2 ft at 11 seconds. A chance of showers with a
slight chance of tstms.
.SUN NIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and SE 2 ft at 11 seconds. A slight chance of
showers and tstms after midnight.
.MON...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ382-190800-
Waters from Edisto Beach SC to Savannah GA extending from 20 to
60 NM-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 3 ft. Wave Detail: E
3 ft at 7 seconds and E 1 foot at 12 seconds.
.TONIGHT...SE winds 5 kt, becoming SW after midnight. Seas 2 to
3 ft. Wave Detail: E 3 ft at 7 seconds and E 1 foot at
12 seconds.
.SAT...N winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds
and SE 1 foot at 12 seconds.
.SAT NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds and SE 2 ft at 11 seconds. A chance of showers with a
slight chance of tstms after midnight.
.SUN...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
7 seconds and SE 2 ft at 11 seconds. A chance of showers with a
slight chance of tstms.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds and SE 2 ft at 11 seconds. A chance of showers with
a slight chance of tstms after midnight.
.MON...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ384-190800-
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM-
224 PM EDT Fri Sep 18 2026

.THIS AFTERNOON...NE winds 5 to 10 kt. Seas 3 ft. Wave Detail: E
3 ft at 7 seconds.
.TONIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
7 seconds and SE 1 foot at 12 seconds.
.SAT...NE winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at 7 seconds
and SE 1 foot at 12 seconds.
.SAT NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds and SE 1 foot at 12 seconds. A chance of showers with a
slight chance of tstms after midnight.
.SUN...NE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds and SE 1 foot at 11 seconds. A chance of showers with a
slight chance of tstms.
.SUN NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A chance of showers with a slight chance of tstms
after midnight.
.MON...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely
with a chance of tstms.
.TUE...E winds 5 kt. Seas 2 to 3 ft. Showers likely with a slight
chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 ft. Showers likely with a
chance of tstms.

Winds and seas higher in and near tstms.

$$