699
FZUS52 KCHS 041141
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
741 AM EDT Mon Aug 4 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

AMZ300-050015-
741 AM EDT Mon Aug 4 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A stationary front will linger near the area this week as high
pressure remains centered well to the north. Low pressure could
develop off the Southeast U.S. coast Thursday into the weekend.

$$

AMZ330-050015-
Charleston Harbor-
741 AM EDT Mon Aug 4 2025

.TODAY...NE winds 10 to 15 kt. Showers likely with a chance of
tstms.
.TONIGHT...E winds 5 to 10 kt. A chance of showers and tstms.
.TUE...E winds 5 kt, increasing to 10 kt in the afternoon.
Showers likely. A chance of tstms in the morning, then tstms
likely in the afternoon.
.TUE NIGHT...E winds 5 to 10 kt. Showers likely. Tstms likely,
mainly in the evening.
.WED...E winds 5 to 10 kt. Showers likely. A chance of tstms in
the morning, then tstms likely in the afternoon.
.WED NIGHT...E winds 5 to 10 kt. Showers and tstms likely, mainly
in the evening.
.THU...NE winds 5 to 10 kt. Showers and tstms likely.
.THU NIGHT...NE winds 5 to 10 kt. Showers and tstms likely.
.FRI...NE winds 10 kt. Showers and tstms likely.
.FRI NIGHT...E 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 84 degrees.

$$

AMZ350-050015-
Waters from South Santee River to Edisto Beach SC out 20 NM-
741 AM EDT Mon Aug 4 2025

.TODAY...NE winds 15 kt with gusts to 20 kt. Seas 4 ft. Wave
Detail: E 4 ft at 8 seconds and SE 1 foot at 8 seconds. Showers
likely with a chance of tstms until late afternoon, then a chance
of showers and tstms late. Vsby 1 to 3 NM this afternoon.
.TONIGHT...E winds 10 to 15 kt with gusts to 20 kt, diminishing
to 5 to 10 kt after midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft
at 8 seconds and SE 2 ft at 8 seconds. A chance of tstms. A
chance of showers in the evening, then showers likely after
midnight.
.TUE...E winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
9 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms.
.TUE NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds and SE 1 foot at 8 seconds. A chance of tstms.
A chance of showers in the evening, then showers likely after
midnight.
.WED...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft at
8 seconds and SE 2 ft at 8 seconds. Showers likely with a chance
of tstms.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 8 seconds and SE 2 ft at 8 seconds. Showers likely with a
chance of tstms.
.THU...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.THU NIGHT...NE winds 10 to 15 kt. Seas 3 ft. Showers and tstms
likely.
.FRI...NE winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with
a chance of tstms.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely
with a chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-050015-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
741 AM EDT Mon Aug 4 2025

.TODAY...NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 8 seconds and SE 1 foot at 8 seconds. Showers with tstms
likely this morning, then showers likely with a chance of tstms
this afternoon with vsby 1 to 3 NM.
.TONIGHT...E winds 10 to 15 kt with gusts to 20 kt, becoming SE
5 to 10 kt after midnight. Seas 3 to 4 ft. Wave Detail: E 3 ft at
8 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms.
.TUE...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
8 seconds and SE 1 foot at 8 seconds. Showers likely with a
chance of tstms.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 8 seconds and SE 1 foot at 8 seconds. Showers and tstms
likely in the evening, then showers with a chance of tstms after
midnight.
.WED...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 8 seconds and SE 1 foot at 8 seconds. A chance of tstms.
Showers.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds and SE 2 ft at 8 seconds. Showers likely with a
chance of tstms.
.THU...NE winds 5 to 10 kt. Seas 2 to 3 ft. Showers likely with a
chance of tstms.
.THU NIGHT...NE winds 10 kt. Seas 2 to 3 ft. Showers and tstms
likely.
.FRI...NE winds 10 kt. Seas 2 to 3 ft. Showers and tstms likely.
.FRI NIGHT...E winds 10 kt. Seas 3 to 4 ft. Showers likely with a
chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-050015-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
741 AM EDT Mon Aug 4 2025

.TODAY...E winds 10 kt, becoming NE late this morning. Seas 3 ft.
Wave Detail: E 3 ft at 8 seconds. Showers with a chance of tstms
this morning, then showers and tstms likely this afternoon.
.TONIGHT...E winds 10 to 15 kt, becoming SE 5 to 10 kt after
midnight. Seas 3 ft. Wave Detail: E 3 ft at 9 seconds. Showers
likely with a chance of tstms. Vsby 1 to 3 NM after midnight.
.TUE...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and SE 1 foot at 8 seconds. Showers likely. A chance
of tstms in the morning, then tstms likely in the afternoon.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 8 seconds and SE 1 foot at 8 seconds. Showers likely.
Tstms likely, mainly in the evening.
.WED...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 8 seconds and SE 1 foot at 8 seconds. Showers likely. A chance
of tstms in the morning, then tstms likely in the afternoon.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds and SE 1 foot at 8 seconds. Showers likely. Tstms
likely, mainly in the evening.
.THU...NE winds 10 kt. Seas 2 to 3 ft. Showers and tstms likely.
.THU NIGHT...NE winds 10 kt. Seas 2 to 3 ft. Showers likely with
a chance of tstms.
.FRI...NE winds 10 kt. Seas 2 to 3 ft. Showers with tstms likely.
.FRI NIGHT...E winds 10 to 15 kt. Seas 3 ft. Showers likely with
a chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-050015-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
741 AM EDT Mon Aug 4 2025

.TODAY...E winds 10 kt, becoming NE this afternoon. Seas 4 ft.
Wave Detail: NE 4 ft at 9 seconds and SE 1 foot at 8 seconds.
Tstms likely this morning. Showers. A chance of tstms this
afternoon.
.TONIGHT...E winds 10 kt, becoming SE after midnight. Seas 3 to
4 ft. Wave Detail: NE 4 ft at 9 seconds and SE 1 foot at
8 seconds. Showers likely with a chance of tstms. Vsby 1 to 3 NM
after midnight.
.TUE...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: NE 3 ft
at 8 seconds and SE 2 ft at 8 seconds. Showers likely with a
chance of tstms.
.TUE NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 8 seconds and SE 2 ft at 8 seconds. Showers likely with a
chance of tstms.
.WED...NE winds 5 kt. Seas 3 ft. Wave Detail: E 3 ft at 8 seconds
and SE 2 ft at 8 seconds. Showers likely with a chance of tstms.
.WED NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
2 ft at 8 seconds and SE 2 ft at 8 seconds. A chance of tstms. A
chance of showers in the evening, then showers after midnight.
.THU...NE winds 10 kt. Seas 3 ft. Showers with a chance of tstms.
.THU NIGHT...NE winds 10 kt. Seas 3 ft. Showers with a chance of
tstms.
.FRI...NE winds 10 kt. Seas 3 to 4 ft. Showers with a chance of
tstms.
.FRI NIGHT...E winds 10 kt. Seas 4 ft. Showers with a chance of
tstms.

Winds and seas higher in and near tstms.

$$