390
FZUS52 KCHS 060309
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1109 PM EDT Sat Jul 5 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

AMZ300-061615-
1109 PM EDT Sat Jul 5 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Tropical Storm Chantal is forecast to approach the South Carolina
coast tonight and move onshore Sunday morning. High pressure will
rebuild into the area next week. Refer to the latest advisory on
Chantal issued by the National Hurricane Center.

$$

AMZ330-061615-
Charleston Harbor-
1109 PM EDT Sat Jul 5 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 2 AM EDT SUNDAY...
...TROPICAL STORM WATCH IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.REST OF TONIGHT...NW winds 15 to 20 kt with gusts to 25 kt,
diminishing to 10 to 15 kt with gusts to 20 kt late. A slight
chance of tstms. Showers.
.SUN...SW winds 10 to 15 kt. A chance of showers with a slight
chance of tstms in the morning, then a chance of showers and
tstms in the afternoon.
.SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt,
diminishing to 5 to 10 kt after midnight. A chance of showers and
tstms, mainly in the evening.
.MON...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. A slight chance of showers and tstms in the afternoon.
.MON NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. A slight chance of showers and tstms early in the
evening.
.TUE...SW winds 5 to 10 kt. A slight chance of showers and tstms
in the afternoon.
.TUE NIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms early in the evening.
.WED...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. A slight chance of showers and tstms in the afternoon.
.WED NIGHT...SW winds 10 to 15 kt. A slight chance of showers and
tstms.
.THU...SW winds 10 to 15 kt. A chance of showers and tstms.
.THU NIGHT...SW winds 10 to 15 kt. A chance of showers and tstms
until early morning, then a slight chance of showers and tstms
late.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 84 degrees.

$$

AMZ350-061615-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1109 PM EDT Sat Jul 5 2025

...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.REST OF TONIGHT...Tropical storm conditions. NE winds 15 to
20 kt with gusts to 25 kt, becoming W 30 to 35 kt. Seas 6 to
8 ft, building to 8 to 10 ft. Wave Detail: E 8 ft at 8 seconds. A
slight chance of tstms. Showers.
.SUN...Tropical storm conditions expected. SW winds 30 to 35 kt,
diminishing to 15 to 20 kt with gusts to 25 kt in the afternoon.
Seas 7 to 9 ft, subsiding to 4 to 6 ft in the afternoon. Wave
Detail: SE 7 ft at 9 seconds and SW 3 ft at 4 seconds. A chance
of showers and tstms.
.SUN NIGHT...SW 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: S 3 ft at 6 seconds. A chance of showers.
A chance of tstms until early morning, then a slight chance of
tstms late.
.MON...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 7 seconds. A slight chance of showers and tstms.
.MON NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SE 3 ft at 7 seconds. A slight chance of showers and tstms.
.TUE...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds. A
slight chance of showers and tstms.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 3 ft. A slight chance of
showers and tstms.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers
and tstms until late afternoon, then a slight chance of showers
and tstms late.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 ft. A chance of showers
and tstms.
.THU...SW winds 10 to 15 kt. Seas 3 ft. A chance of showers and
tstms.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-061615-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1109 PM EDT Sat Jul 5 2025

...TROPICAL STORM WARNING IN EFFECT...
...SMALL CRAFT SHOULD REMAIN IN PORT...

.REST OF TONIGHT...N winds 15 to 20 kt, becoming NW 10 to 15 kt.
Seas 5 to 6 ft. Wave Detail: E 6 ft at 8 seconds. A chance of
showers with a slight chance of tstms.
.SUN...W winds 10 to 15 kt. Seas 4 to 6 ft, subsiding to 3 to
4 ft in the afternoon. Wave Detail: E 5 ft at 8 seconds and W
2 ft at 3 seconds. A slight chance of tstms in the morning. A
chance of showers. A chance of tstms in the afternoon.
.SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: SE 3 ft at 7 seconds and SW 2 ft at 3 seconds.
A chance of showers and tstms early in the evening, then a slight
chance of showers and tstms in the late evening and early
morning.
.MON...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at
7 seconds.
.MON NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft
at 4 seconds and SE 3 ft at 7 seconds. A slight chance of showers
and tstms late.
.TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds. A slight chance of showers and tstms in the
morning.
.TUE NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.WED...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. A slight chance of showers and tstms.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers. A chance of tstms until early morning, then a slight
chance of tstms late.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers.
A slight chance of tstms in the morning, then a chance of tstms
in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft.
A chance of showers. A chance of tstms until early morning, then
a slight chance of tstms late.

Winds and seas higher in and near tstms.

$$

AMZ354-061615-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1109 PM EDT Sat Jul 5 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT SUNDAY...

.REST OF TONIGHT...NW winds 10 to 15 kt. Seas 5 to 6 ft,
subsiding to 4 to 5 ft. Wave Detail: E 5 ft at 7 seconds. A
slight chance of tstms. A chance of showers late this evening,
then a slight chance of showers late.
.SUN...W winds 10 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft in
the afternoon. Wave Detail: E 4 ft at 8 seconds. A slight chance
of showers and tstms early in the morning. A slight chance of
showers and tstms early in the afternoon, then a chance of
showers and tstms late.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: E 3 ft
at 7 seconds and S 2 ft at 4 seconds. A chance of showers and
tstms early in the evening, then a slight chance of showers and
tstms late in the evening.
.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SE 3 ft at 8 seconds and S 2 ft at 4 seconds.
.TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 8 seconds.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight
chance of showers and tstms in the late evening and early
morning.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms early in the afternoon. A chance of showers and
tstms late.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms until early morning, then a slight chance of
showers and tstms late.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms in the morning, then a chance of showers and
tstms in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms until early morning, then a slight chance of
showers late.

Winds and seas higher in and near tstms.

$$

AMZ374-061615-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1109 PM EDT Sat Jul 5 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT SUNDAY...

.REST OF TONIGHT...NW winds 10 to 15 kt. Seas 5 to 6 ft. Wave
Detail: NE 6 ft at 7 seconds. A chance of showers with a slight
chance of tstms.
.SUN...SW winds 10 to 15 kt. Seas 4 to 6 ft. Wave Detail: NE 5 ft
at 7 seconds and SW 1 foot at 3 seconds. A slight chance of tstms
in the morning. A slight chance of showers. A slight chance of
tstms late.
.SUN NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: SE 4 ft at 7 seconds and S 2 ft at 3 seconds.
A slight chance of showers and tstms.
.MON...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 7 seconds and SW 2 ft at 3 seconds. A slight chance of showers
and tstms early in the morning.
.MON NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and SW 2 ft at 3 seconds. A slight chance of
showers and tstms after midnight.
.TUE...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 14 seconds. A slight chance of
showers and tstms until late afternoon.
.TUE NIGHT...S winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms in the late evening and overnight.
.WED...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers
and tstms early in the morning, then a chance of showers and
tstms late in the morning. A slight chance of showers and tstms
in the afternoon.
.WED NIGHT...S winds 10 to 15 kt. Seas 3 ft. A chance of showers
and tstms.
.THU...SW winds 10 to 15 kt. Seas 3 ft. A chance of showers. A
chance of tstms early in the morning, then a slight chance of
tstms in the late morning and afternoon.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. A chance of showers. A chance of tstms until early morning,
then a slight chance of tstms late.

Winds and seas higher in and near tstms.

$$