793
FZUS52 KCHS 312015
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
415 PM EDT Thu Jul 31 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

AMZ300-010915-
415 PM EDT Thu Jul 31 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Atlantic high pressure will extend across the region tonight. A
cold front may stall nearby this weekend.

$$

AMZ330-010915-
Charleston Harbor-
415 PM EDT Thu Jul 31 2025

.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt, diminishing
to 5 to 10 kt late. A slight chance of showers and tstms early
this evening, then a chance of showers and tstms late this
evening.
.FRI...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts to
20 kt in the afternoon. A chance of showers and tstms in the
afternoon.
.FRI NIGHT...SW winds 10 to 15 kt, becoming NW 5 to 10 kt after
midnight. Showers with tstms likely.
.SAT...N winds 5 to 10 kt, becoming NE 10 to 15 kt with gusts to
20 kt in the afternoon. Showers likely with a chance of tstms in
the morning, then showers with tstms likely in the afternoon.
.SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Showers
with tstms likely in the evening, then showers likely with a
chance of tstms after midnight.
.SUN...NE winds 15 to 20 kt. Waves 1 to 2 ft. Showers with tstms
likely.
.SUN NIGHT...NE winds 15 to 20 kt. Waves 1 to 2 ft. Showers
likely with a chance of tstms.
.MON...NE winds 10 to 15 kt. Showers likely with a chance of
tstms.
.MON NIGHT...E winds 10 to 15 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 88 degrees.

$$

AMZ350-010915-
Waters from South Santee River to Edisto Beach SC out 20 NM-
415 PM EDT Thu Jul 31 2025

.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at
9 seconds. A slight chance of showers and tstms this evening,
then a chance of showers and tstms after midnight. A slight
chance of showers and tstms late.
.FRI...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 3 ft at
5 seconds and SE 1 foot at 9 seconds. A slight chance of showers
and tstms in the morning, then a chance of showers and tstms in
the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming
NW after midnight. Seas 2 to 3 ft. Wave Detail: SW 3 ft at
5 seconds and SE 1 foot at 8 seconds. Showers with tstms likely.
.SAT...NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft
at 5 seconds and S 2 ft at 5 seconds. Showers. A chance of tstms
in the morning, then tstms likely in the afternoon.
.SAT NIGHT...NE winds 15 to 20 kt. Seas 3 to 4 ft, building to
4 to 5 ft after midnight. Wave Detail: NE 4 ft at 5 seconds and S
2 ft at 5 seconds, becoming NE 4 ft at 5 seconds and S 1 foot at
5 seconds. Tstms likely. Showers.
.SUN...NE winds 15 to 20 kt. Seas 4 to 6 ft. Showers with tstms
likely.
.SUN NIGHT...NE winds 15 to 20 kt. Seas 4 to 6 ft. Showers likely
with a chance of tstms.
.MON...NE winds 15 kt. Seas 4 to 5 ft. Showers likely with a
chance of tstms.
.MON 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.

$$

AMZ352-010915-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
415 PM EDT Thu Jul 31 2025

.TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
3 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of
showers and tstms until early morning.
.FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 5 seconds and SE 1 foot at 9 seconds. A chance of showers and
tstms in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 5 seconds and SE 1 foot at 9 seconds. Showers with tstms
likely.
.SAT...NE winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at
5 seconds and E 2 ft at 8 seconds. Showers likely with a chance
of tstms in the morning, then showers with tstms likely in the
afternoon.
.SAT NIGHT...NE winds 10 to 15 kt with gusts to 20 kt. Seas 2 to
3 ft. Wave Detail: E 3 ft at 5 seconds. Showers, tstms.
.SUN...NE winds 15 to 20 kt. Seas 3 to 4 ft. Showers with tstms
likely.
.SUN NIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely
with a chance of tstms.
.MON...NE winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely with
a chance of tstms.
.MON 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.

$$

AMZ354-010915-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
415 PM EDT Thu Jul 31 2025

.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt, becoming W
late. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and E
1 foot at 8 seconds. A slight chance of showers and tstms late
this evening.
.FRI...W winds 10 to 15 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at
9 seconds. A slight chance of showers and tstms in the afternoon.
.FRI NIGHT...S winds 15 kt, becoming W after midnight. Seas 2 to
3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at
9 seconds. Showers likely. Tstms likely, mainly in the evening.
.SAT...NW winds 10 kt, becoming NE in the afternoon. Seas 2 to
3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at
8 seconds. Showers likely with a chance of tstms in the morning,
then showers with tstms likely in the afternoon.
.SAT NIGHT...E winds 10 to 15 kt. Seas 2 ft. Wave Detail: NE 2 ft
at 3 seconds and E 2 ft at 8 seconds. Showers. Tstms, mainly in
the evening.
.SUN...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers with tstms
likely.
.SUN NIGHT...NE winds 15 kt. Seas 3 to 4 ft. Showers likely with
a chance of tstms.
.MON...NE winds 15 kt. Seas 3 to 4 ft. Showers and tstms likely.
.MON 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.

$$

AMZ374-010915-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
415 PM EDT Thu Jul 31 2025

.TONIGHT...S winds 15 kt, becoming SW late. Seas 2 to 3 ft,
building to 3 to 4 ft after midnight. Wave Detail: S 3 ft at
4 seconds and SE 1 foot at 8 seconds, becoming SW 3 ft at
5 seconds and SE 1 foot at 9 seconds. A slight chance of showers
and tstms after midnight.
.FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 5 seconds and SE 2 ft at 9 seconds. A slight chance of showers
and tstms in the afternoon.
.FRI NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds.
Showers likely. Tstms likely, mainly in the evening.
.SAT...NW winds 10 to 15 kt, becoming NE in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at
8 seconds. Showers likely with a chance of tstms in the morning,
then showers with tstms likely in the afternoon.
.SAT NIGHT...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 2 ft
at 4 seconds and E 2 ft at 8 seconds. Showers. Tstms likely,
mainly in the evening.
.SUN...NE winds 10 to 15 kt. Seas 2 to 3 ft. Showers with tstms
likely.
.SUN NIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Showers with a
chance of tstms.
.MON...NE winds 10 to 15 kt. Seas 4 to 5 ft. Showers likely with
a chance of tstms.
.MON NIGHT...E winds 10 to 15 kt. Seas 4 to 5 ft. Showers likely
with a chance of tstms.

Winds and seas higher in and near tstms.

$$