970
FZUS52 KCHS 161834
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
234 PM EDT Wed Sep 16 2026

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

AMZ300-170800-
234 PM EDT Wed Sep 16 2026

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
An area of strong high pressure just to our north will yield a
strong northeast breeze and elevated seas today. Winds and seas
trend lower this evening and overnight. The high should persist
to our north through Thursday, gradually weakening Friday and
Saturday as weak low pressure approaches from the Atlantic.

$$

AMZ340-170800-
Charleston Harbor-
234 PM EDT Wed Sep 16 2026

.THIS AFTERNOON...NE winds 10 to 15 kt.
.TONIGHT...E winds 10 to 15 kt, becoming NE 5 to 10 kt after
midnight.
.THU...NE winds 5 to 10 kt, becoming E in the afternoon.
.THU NIGHT...E winds 5 to 10 kt, diminishing to 5 kt after
midnight.
.FRI...N winds 5 kt, becoming SE in the afternoon.
.FRI NIGHT...S winds 5 to 10 kt, becoming SW after midnight.
.SAT...NE winds 5 to 10 kt. A chance of showers and tstms.
.SAT NIGHT...E winds 5 to 10 kt. A slight chance of showers and
tstms.
.SUN...E winds 5 to 10 kt. A chance of showers and tstms.
.SUN NIGHT...SE winds 5 kt. A slight 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.

$$

AMZ360-170800-
Coastal waters from South Santee River to Edisto Beach SC out
20 NM-
234 PM EDT Wed Sep 16 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave
Detail: E 5 ft at 6 seconds.
.TONIGHT...E winds 15 to 20 kt, becoming NE 10 to 15 kt after
midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: E 4 ft at 6 seconds, becoming E 4 ft at 7 seconds.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: E 4 ft at 7 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 7 seconds and E 1 foot at 13 seconds.
.FRI...N winds 5 kt, becoming SE in the afternoon. Seas 2 to
3 ft. Wave Detail: E 3 ft at 7 seconds and E 1 foot at
13 seconds.
.FRI NIGHT...S winds 5 to 10 kt, diminishing to 5 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 2 ft at 7 seconds and E
1 foot at 12 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
with a slight chance of tstms.
.SUN...E winds 5 to 10 kt. Seas 2 ft. A chance of showers with a
slight chance of tstms.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ362-170800-
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM-
234 PM EDT Wed Sep 16 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

.THIS AFTERNOON...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave
Detail: E 5 ft at 7 seconds and SE 1 foot at 8 seconds.
.TONIGHT...E winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: E 5 ft at 6 seconds, becoming E 4 ft at 6 seconds.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: E 4 ft at 7 seconds and SE 2 ft at 8 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 7 seconds and SE 2 ft at 8 seconds.
.FRI...NE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
7 seconds and SE 1 foot at 13 seconds.
.FRI NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 7 seconds and E 1 foot at 12 seconds.
.SAT...E winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
with a slight chance of tstms.
.SUN...E winds 5 to 10 kt. Seas 2 ft. A chance of showers with a
slight chance of tstms.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ364-170800-
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,
including Grays Reef National Marine Sanctuary-
234 PM EDT Wed Sep 16 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT THURSDAY...

.THIS AFTERNOON...NE winds 20 kt. Seas 4 to 5 ft. Wave Detail: E
5 ft at 7 seconds.
.TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft. Wave Detail: E 5 ft at 6 seconds.
.THU...NE winds 15 to 20 kt. Seas 4 ft. Wave Detail: E 4 ft at
7 seconds.
.THU NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 7 seconds and SE
2 ft at 8 seconds.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 7 seconds and SE 2 ft at 8 seconds.
.FRI NIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 7 seconds.
.SAT...E winds 5 to 10 kt. Seas 2 ft.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.
.SUN...E winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ380-170800-
Waters from South Santee River SC to Edisto Beach SC extending
from 20 to 60 NM-
234 PM EDT Wed Sep 16 2026

.THIS AFTERNOON...NE winds 15 to 20 kt. Seas 5 ft. Wave Detail:
NE 5 ft at 7 seconds.
.TONIGHT...NE winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 4 to 5 ft. Wave Detail: NE 5 ft at 7 seconds.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Seas 4 ft. Wave
Detail: E 4 ft at 7 seconds and E 1 foot at 13 seconds.
.THU NIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 7 seconds and E 1 foot at 13 seconds.
.FRI...NE winds 5 kt. Seas 3 ft. Wave Detail: E 3 ft at 7 seconds
and E 1 foot at 12 seconds.
.FRI NIGHT...SE winds 5 to 10 kt, diminishing to 5 kt after
midnight. Seas 2 to 3 ft. Wave Detail: E 3 ft at 7 seconds and E
1 foot at 12 seconds.
.SAT...E winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ382-170800-
Waters from Edisto Beach SC to Savannah GA extending from 20 to
60 NM-
234 PM EDT Wed Sep 16 2026

.THIS AFTERNOON...NE winds 15 to 20 kt. Seas 5 ft. Wave Detail:
NE 5 ft at 7 seconds and SE 2 ft at 8 seconds. A slight chance of
showers early.
.TONIGHT...E winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft. Wave Detail: NE 5 ft at 7 seconds and SE 2 ft at 8 seconds.
.THU...NE winds 10 to 15 kt with gusts to 20 kt. Seas 4 to 5 ft.
Wave Detail: NE 4 ft at 7 seconds and SE 2 ft at 8 seconds.
.THU NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 7 seconds and
SE 2 ft at 8 seconds.
.FRI...NE winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
7 seconds and SE 2 ft at 8 seconds.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 7 seconds and E 1 foot at 12 seconds.
.SAT...E winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.SUN NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ384-170800-
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM-
234 PM EDT Wed Sep 16 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT THURSDAY...

.THIS AFTERNOON...NE winds 15 to 20 kt. Seas 5 ft. Wave Detail:
NE 5 ft at 7 seconds. A slight chance of showers.
.TONIGHT...NE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to
6 ft, subsiding to 4 to 6 ft after midnight. Wave Detail: NE 6 ft
at 7 seconds, becoming NE 5 ft at 7 seconds.
.THU...NE winds 15 kt with gusts to 20 kt. Seas 4 to 5 ft. Wave
Detail: NE 5 ft at 7 seconds.
.THU NIGHT...NE winds 10 to 15 kt, becoming E 5 to 10 kt after
midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: E 5 ft at 8 seconds, becoming E 4 ft at 8 seconds.
.FRI...NE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 8 seconds and SE 1 foot at 12 seconds.
.FRI NIGHT...E winds 5 kt. Seas 3 ft. Wave Detail: E 3 ft at
7 seconds and SE 1 foot at 12 seconds.
.SAT...E winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.SUN...E winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SUN NIGHT...E winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$