008
FZUS52 KCHS 170528
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
128 AM EDT Thu Jul 17 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

AMZ300-171815-
128 AM EDT Thu Jul 17 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Atlantic high pressure will prevail through the weekend. A cold
front may sag into the area early next week.

$$

AMZ330-171815-
Charleston Harbor-
128 AM EDT Thu Jul 17 2025

.TODAY...S winds 10 to 15 kt with gusts to 20 kt. A chance of
showers and tstms early this morning, then a slight chance of
showers and tstms late this morning. A chance of showers and tstms
early this afternoon.
.TONIGHT...SW winds 10 to 15 kt.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. A slight chance of showers and tstms.
.FRI NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. A slight chance of showers and tstms in the
evening.
.SAT...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.
.SAT NIGHT...SW winds 10 to 15 kt. A slight chance of showers and
tstms in the evening.
.SUN...SW winds 10 to 15 kt. A slight chance of showers and
tstms.
.SUN NIGHT...SW winds 10 to 15 kt. A slight chance of showers and
tstms.
.MON...SW winds 10 to 15 kt. A chance of showers and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Showers likely with a chance of
tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 86 degrees.

$$

AMZ350-171815-
Waters from South Santee River to Edisto Beach SC out 20 NM-
128 AM EDT Thu Jul 17 2025

.TODAY...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft at
6 seconds. A chance of showers and tstms this morning, then a
slight chance of showers and tstms early this afternoon.
.TONIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft
at 6 seconds.
.FRI...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at
7 seconds. A slight chance of showers and tstms.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and SW 2 ft at 4 seconds.
.SAT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at
8 seconds. A slight chance of showers and tstms.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of
showers and tstms.
.SUN...SW winds 10 to 15 kt. Seas 3 ft. A slight chance of
showers and tstms.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 ft. A chance of showers
and tstms.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-171815-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
128 AM EDT Thu Jul 17 2025

.TODAY...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
6 seconds. A chance of showers and tstms early this morning, then
a slight chance of showers and tstms late this morning. A chance
of showers and tstms early this afternoon.
.TONIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.FRI...SW winds 5 to 10 kt, becoming S 10 to 15 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 7 seconds and
SW 1 foot at 4 seconds. A slight chance of showers and tstms.
.FRI NIGHT...SW winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
8 seconds.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and S 2 ft at 4 seconds.
.SUN...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers
and tstms.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Showers likely with
a chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-171815-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
128 AM EDT Thu Jul 17 2025

.TODAY...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at
6 seconds. A slight chance of showers and tstms late this morning
and early afternoon.
.TONIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.FRI...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
7 seconds. A slight chance of showers and tstms.
.FRI NIGHT...SW winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
8 seconds and SW 2 ft at 4 seconds. A slight chance of showers
and tstms in the evening.
.SAT...SW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and S 2 ft at 4 seconds.
.SUN...SW winds 10 kt. Seas 2 to 3 ft.
.SUN NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.MON...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 10 kt. Seas 2 ft. A chance of showers and
tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-171815-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
128 AM EDT Thu Jul 17 2025

.TODAY...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
6 seconds. A chance of showers and tstms this morning, then a
slight chance of showers and tstms early this afternoon.
.TONIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.FRI...SW winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
7 seconds. A slight chance of showers and tstms.
.FRI NIGHT...SW winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
8 seconds.
.SAT...SW winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
8 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and S 2 ft at 3 seconds.
.SUN...SW winds 10 to 15 kt. Seas 3 ft.
.SUN NIGHT...SW winds 10 to 15 kt. Seas 3 ft. A slight chance of
showers and tstms.
.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$