National Weather Service Marine Forecast FZUS52 KCHS
FZUS52 KCHS 130347
CWFCHS
Coastal Waters Forecast
National Weather Service Charleston SC
1147 PM EDT Sun Jul 12 2026
South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary
AMZ300-131800
1147 PM EDT Sun Jul 12 2026
.Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... A cold front may push south over the area late this weekend, remaining in the vicinity through early next week.
AMZ340-131800
Charleston Harbor
1147 PM EDT Sun Jul 12 2026
TONIGHT
W winds 10 to 15 kt, decreasing to 5 to 10 kt late.
Showers likely with a chance of tstms until early morning, then a
slight chance of showers and tstms late.
MON
NW winds 5 kt, becoming S in the afternoon. A chance of
showers and tstms in the afternoon.
MON NIGHT
SW winds 5 to 10 kt. Showers. Tstms likely, mainly
in the evening.
TUE
NE winds 5 kt, becoming SE in the afternoon. Showers
likely with a chance of tstms in the morning, then showers with
tstms likely in the afternoon.
TUE NIGHT
S winds 5 kt, becoming W after midnight. Showers
with a chance of tstms in the evening, then a chance of showers
with a slight chance of tstms after midnight.
WED
NW winds 5 kt, becoming SW in the afternoon. A slight
chance of showers and tstms in the morning, then a chance of
showers and tstms in the afternoon.
WED NIGHT
SW winds 5 to 10 kt. A chance of showers and tstms
in the evening.
THU
W winds 5 to 10 kt.
THU NIGHT
W winds 5 to 10 kt.
FRI
SW winds 5 to 10 kt. A slight chance of showers and tstms.
FRI NIGHT
SW winds 5 to 10 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 86 degrees.
AMZ360-131800
Coastal waters from South Santee River to Edisto Beach SC out
20 NM
1147 PM EDT Sun Jul 12 2026
TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt, becoming W
5 to 10 kt late. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5
seconds and SE 2 ft at 9 seconds. A chance of showers this
evening. A chance of tstms. Showers likely after midnight.
MON
NW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 9 seconds.
A slight chance of showers and tstms in the morning, then a
chance of showers and tstms in the afternoon.
MON NIGHT
SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 5 seconds and SE 2 ft at 9 seconds. Showers with a chance of
tstms.
TUE
S winds 5 kt, becoming SE in the afternoon. Seas 2 ft.
Wave Detail: SE 2 ft at 9 seconds and S 1 foot at 4 seconds.
Showers likely with a chance of tstms.
TUE NIGHT
S winds 5 to 10 kt, becoming W after midnight. Seas
2 ft. Wave Detail: SE 2 ft at 9 seconds and S 1 foot at
5 seconds. Showers likely with a chance of tstms.
WED
NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: E 2 ft at 8 seconds and SW 1 foot at
4 seconds. A slight chance of tstms. A chance of showers, mainly
in the morning.
WED NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.
THU
W winds 10 to 15 kt. Seas 2 to 3 ft.
THU NIGHT
W winds 10 to 15 kt. Seas 2 to 3 ft.
FRI
SW winds 10 to 15 kt. Seas 2 ft.
FRI NIGHT
SW winds 10 to 15 kt. Seas 2 ft. A chance of showers
and tstms.
Winds and seas higher in and near tstms.
AMZ362-131800
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM
1147 PM EDT Sun Jul 12 2026
TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt, becoming W
late. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE
2 ft at 8 seconds. Showers likely this evening. A chance of
tstms. A chance of showers after midnight.
MON
W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at 8 seconds.
A slight chance of showers and tstms in the morning, then a
chance of showers and tstms in the afternoon.
MON NIGHT
SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 5 seconds and SE 2 ft at 9 seconds. Showers with a chance of
tstms.
TUE
W winds 5 kt. Seas 2 ft. Wave Detail: S 1 foot at
4 seconds and SE 1 foot at 9 seconds. Showers likely with a
chance of tstms.
TUE NIGHT
SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 9 seconds and S 1 foot at 4 seconds. Showers likely. A chance
of tstms, mainly in the evening.
WED
W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 8 seconds and SW 1 foot at 4 seconds. A slight chance of
showers and tstms.
WED NIGHT
SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
THU
W winds 5 to 10 kt. Seas 2 to 3 ft.
THU NIGHT
W winds 10 kt. Seas 2 ft.
FRI
W winds 5 to 10 kt. Seas 2 ft.
FRI NIGHT
SW winds 10 to 15 kt. Seas 2 ft. A slight chance of
showers and tstms.
Winds and seas higher in and near tstms.
AMZ364-131800
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,
including Grays Reef National Marine Sanctuary
1147 PM EDT Sun Jul 12 2026
TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt, becoming W
after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds
and SE 2 ft at 8 seconds. A chance of showers and tstms, mainly
this evening.
MON
W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at
8 seconds. Showers and tstms likely in the afternoon.
MON NIGHT
SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 4 seconds and SE 1 foot at 9 seconds. Showers and tstms likely
in the evening, then showers likely with a chance of tstms after
midnight.
TUE
W winds 5 to 10 kt. Seas 2 ft. Wave Detail: SW 1 foot at
4 seconds and SE 1 foot at 9 seconds. A chance of showers with a
slight chance of tstms in the morning, then showers likely with a
chance of tstms in the afternoon.
TUE NIGHT
W winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 1 foot
at 3 seconds and SE 1 foot at 9 seconds. Showers likely with a
chance of tstms in the evening, then a chance of showers with a
slight chance of tstms after midnight.
WED
W winds 5 to 10 kt. Seas 2 ft. Wave Detail: SW 2 ft at
3 seconds and SE 2 ft at 9 seconds. A slight chance of showers
and tstms in the afternoon.
WED NIGHT
SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
THU
W winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
THU NIGHT
W winds 10 kt. Seas 2 ft.
FRI
W winds 5 to 10 kt. Seas 2 ft.
FRI NIGHT
SW winds 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
Winds and seas higher in and near tstms.
AMZ380-131800
Waters from South Santee River SC to Edisto Beach SC extending
from 20 to 60 NM
1147 PM EDT Sun Jul 12 2026
TONIGHT
SW winds 10 to 15 kt, becoming W late. Seas 3 ft. Wave
Detail: SW 2 ft at 5 seconds and SE 2 ft at 9 seconds. A slight
chance of showers and tstms early this evening, then a chance of
showers and tstms late this evening.
MON
NW winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at
9 seconds. A chance of showers. A chance of tstms, mainly in the
morning.
MON NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 5 seconds and SE 2 ft at 9 seconds. Showers with a chance
of tstms.
TUE
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 9 seconds and SW 1 foot at 4 seconds. A chance of tstms.
Showers likely, mainly in the morning.
TUE NIGHT
S winds 5 to 10 kt, becoming W after midnight. Seas
3 ft. Wave Detail: NE 3 ft at 8 seconds and SW 1 foot at
4 seconds. A chance of showers. A slight chance of tstms in the
evening, then a chance of tstms after midnight.
WED
W winds 5 to 10 kt. Seas 3 ft. Wave Detail: NE 3 ft at
8 seconds and SW 2 ft at 4 seconds. A chance of showers and
tstms, mainly in the morning.
WED NIGHT
SW winds 5 to 10 kt, becoming W 10 to 15 kt after
midnight. Seas 3 ft. A slight chance of showers and tstms in the
evening, then a chance of showers and tstms after midnight.
THU
W winds 10 to 15 kt. Seas 2 to 3 ft.
THU NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight
chance of showers and tstms.
FRI
W winds 5 to 10 kt. Seas 2 to 3 ft.
FRI NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
Winds and seas higher in and near tstms.
AMZ382-131800
Waters from Edisto Beach SC to Savannah GA extending from 20 to
60 NM
1147 PM EDT Sun Jul 12 2026
TONIGHT
SW winds 15 kt with gusts to 20 kt, becoming W after
midnight. Seas 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE
2 ft at 9 seconds. A slight chance of showers and tstms early
this evening, then a chance of showers and tstms late this
evening. A slight chance of showers and tstms late.
MON
W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at
9 seconds. A chance of showers. A slight chance of tstms in the
morning, then a chance of tstms in the afternoon.
MON NIGHT
SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 4 seconds and SE 2 ft at 9 seconds. Showers with a chance of
tstms.
TUE
W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 9 seconds. A chance of tstms. Showers
likely, mainly in the morning.
TUE NIGHT
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 9 seconds. Showers likely with a
chance of tstms.
WED
W winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 2 ft at
4 seconds and E 2 ft at 8 seconds. A chance of showers with a
slight chance of tstms in the morning.
WED NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight
chance of showers and tstms.
THU
W winds 10 to 15 kt. Seas 2 to 3 ft.
THU NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft.
FRI
W winds 10 to 15 kt. Seas 2 to 3 ft.
FRI NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
Winds and seas higher in and near tstms.
AMZ384-131800
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM
1147 PM EDT Sun Jul 12 2026
TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt, becoming W
after midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds
and SE 2 ft at 8 seconds. A slight chance of showers and tstms
early this evening, then a chance of showers and tstms late this
evening. A slight chance of showers and tstms late.
MON
W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at
8 seconds. A slight chance of showers and tstms in the morning,
then a chance of showers and tstms in the afternoon.
MON NIGHT
SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 9 seconds. A chance of tstms.
Showers.
TUE
W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 9 seconds. Showers likely with a
chance of tstms in the morning, then a chance of showers with a
slight chance of tstms in the afternoon.
TUE NIGHT
SW winds 5 to 10 kt, becoming W 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and
SE 2 ft at 9 seconds. A chance of showers and tstms.
WED
W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and
E 2 ft at 8 seconds. A slight chance of showers and tstms in the
morning.
WED NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight
chance of showers and tstms.
THU
W winds 10 to 15 kt. Seas 2 to 3 ft.
THU NIGHT
SW winds 10 kt. Seas 2 ft.
FRI
W winds 5 to 10 kt. Seas 2 ft.
FRI NIGHT
SW winds 10 to 15 kt. Seas 2 ft. A slight chance of
showers and tstms.
Winds and seas higher in and near tstms.
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