163
FZUS52 KCHS 121732
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
132 PM EDT Sat Jul 12 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

AMZ300-130615-
132 PM EDT Sat Jul 12 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Weak high pressure will continue to build across the region into
early next week. By mid-week, a surface front might sag into the
region increasing storm activity.

$$

AMZ330-130615-
Charleston Harbor-
132 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...S winds 10 kt. A chance of tstms. A chance of
showers.
.TONIGHT...SW winds 5 to 10 kt. A chance of showers and tstms.
.SUN...W winds 5 kt, becoming S 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...E winds 5 kt, increasing to 5 to 10 kt in the afternoon. A
slight chance of showers and tstms in the morning, then a chance
of showers and tstms in the afternoon.
.MON NIGHT...SE winds 5 kt. A chance of showers and tstms, mainly
in the evening.
.TUE...SE winds 5 to 10 kt. Showers and tstms likely.
.TUE NIGHT...S winds 5 to 10 kt. A chance of showers and tstms.
.WED...S winds 10 to 15 kt. Showers with a chance of tstms.
.WED NIGHT...S 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 85 degrees.

$$

AMZ350-130615-
Waters from South Santee River to Edisto Beach SC out 20 NM-
132 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds. A chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 7 seconds. A chance of showers and tstms.
.SUN...W winds 5 kt, becoming S in the afternoon. Seas 2 ft. Wave
Detail: SE 2 ft at 7 seconds. A chance of showers and tstms.
.SUN NIGHT...S winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
7 seconds. A chance of showers and tstms, mainly in the evening.
.MON...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
7 seconds. A slight chance of showers and tstms in the morning,
then a chance of showers and tstms in the afternoon.
.MON NIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 6 seconds. A chance of showers. A slight chance of tstms in
the evening, then a chance of tstms after midnight.
.TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a
chance of tstms.
.TUE NIGHT...S winds 10 kt. Seas 2 to 3 ft. Showers likely with a
chance of tstms.
.WED...S winds 10 to 15 kt. Seas 3 ft. Showers with a chance of
tstms.
.WED NIGHT...S winds 10 to 15 kt. Seas 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-130615-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
132 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds. A chance of showers and tstms.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. A chance of showers and tstms.
.SUN...Variable winds 5 kt. Seas 2 ft. Wave Detail: 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.
.SUN NIGHT...SW winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
7 seconds. A chance of showers and tstms, mainly in the evening.
.MON...NE winds 5 kt, becoming E in the afternoon. Seas 2 ft.
Wave Detail: S 2 ft at 6 seconds. A slight chance of showers and
tstms in the morning, then a chance of showers and tstms in the
afternoon.
.MON NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
6 seconds. A chance of showers and tstms, mainly in the evening.
.TUE...E winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.TUE NIGHT...SE winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.WED...S winds 10 kt. Seas 3 ft. Showers likely with a chance of
tstms.
.WED NIGHT...S winds 10 to 15 kt. Seas 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-130615-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
132 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds. A slight chance of showers and
tstms early, then a chance of showers and tstms late.
.TONIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds. A chance of showers and tstms.
.SUN...W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: 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.
.SUN NIGHT...S winds 5 to 10 kt, becoming SW after midnight. Seas
2 ft. Wave Detail: SE 2 ft at 8 seconds. A chance of showers and
tstms, mainly in the evening.
.MON...N winds 5 kt, becoming E in the afternoon. Seas 2 ft. Wave
Detail: SE 2 ft at 8 seconds and S 1 foot at 4 seconds. A chance
of showers and tstms in the afternoon.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 7 seconds. A chance of showers and tstms, mainly in the
evening.
.TUE...E winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.TUE NIGHT...SE winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.WED...S winds 10 to 15 kt. Seas 3 ft. Showers likely with a
chance of tstms.
.WED NIGHT...S winds 10 to 15 kt. Seas 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-130615-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
132 PM EDT Sat Jul 12 2025

.THIS AFTERNOON...SW winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds. A slight chance of showers and tstms.
.TONIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds. A chance of showers and tstms.
.SUN...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds. A chance of showers and tstms, mainly in the
morning.
.SUN NIGHT...SW winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
evening.
.MON...N winds 5 kt, becoming E in the afternoon. Seas 2 ft. Wave
Detail: SE 2 ft at 8 seconds and S 1 foot at 5 seconds. A slight
chance of showers and tstms.
.MON NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft
at 8 seconds. A slight chance of tstms. A slight chance of
showers in the evening, then a chance of showers after midnight.
.TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.TUE NIGHT...S winds 10 kt. Seas 3 to 4 ft. Showers likely with a
chance of tstms.
.WED...S winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with a
chance of tstms.
.WED NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$