710
FZUS52 KCHS 120802
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
402 AM EDT Mon May 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

AMZ300-122030-
402 AM EDT Mon May 12 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A front will remain stalled near the area, before lifting north
of the region by midweek. High pressure is expected to return
late week.

$$

AMZ330-122030-
Charleston Harbor-
402 AM EDT Mon May 12 2025

.TODAY...SE winds 10 kt, increasing to 15 kt late. Showers with a
chance of tstms.
.TONIGHT...SE winds 10 to 15 kt with gusts to 20 kt. Showers with
a chance of tstms.
.TUE...S winds 10 kt. Showers likely with a chance of tstms in
the morning, then a chance of showers with a slight chance of
tstms in the afternoon.
.TUE NIGHT...SW winds 5 to 10 kt. A chance of showers and tstms.
.WED...SW winds 5 kt, increasing to 10 to 15 kt in the afternoon.
A chance of showers. A slight chance of tstms in the morning,
then a chance of tstms in the afternoon.
.WED NIGHT...SW winds 5 to 10 kt. A chance of showers and tstms,
mainly in the evening.
.THU...SW winds 10 to 15 kt.
.THU NIGHT...SW winds 10 to 15 kt.
.FRI...SW winds 10 to 15 kt.
.FRI NIGHT...SW winds 10 to 15 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 75 degrees.

$$

AMZ350-122030-
Waters from South Santee River to Edisto Beach SC out 20 NM-
402 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...

.TODAY...SE winds 10 to 15 kt, increasing to 15 to 20 kt with
gusts to 25 kt late. Seas 4 to 6 ft. Wave Detail: SE 4 ft at 7
seconds. Showers with a chance of tstms.
.TONIGHT...SE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to
6 ft. Wave Detail: SE 6 ft at 8 seconds. Showers with a chance of
tstms.
.TUE...S winds 10 to 15 kt. Seas 5 to 6 ft, subsiding to 4 to
5 ft in the afternoon. Wave Detail: SE 6 ft at 8 seconds,
becoming SE 5 ft at 8 seconds. Showers likely with a chance of
tstms in the morning, then a chance of showers with a slight
chance of tstms in the afternoon.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 4 to 5 ft, subsiding to
3 to 4 ft after midnight. Wave Detail: SE 5 ft at 8 seconds,
becoming SE 4 ft at 8 seconds. A chance of showers with a slight
chance of tstms in the evening, then showers likely with a chance
of tstms after midnight.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 7 seconds. Showers likely with a slight chance of tstms in the
morning, then a chance of showers and tstms in the afternoon.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 7 seconds. A chance of showers. A chance of tstms, mainly
in the evening.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 3 ft.
.FRI...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

$$

AMZ352-122030-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
402 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON
THROUGH TUESDAY MORNING...

.TODAY...SE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft, building to 4 to 6 ft this afternoon. Wave Detail: SE 4 ft
at 7 seconds, becoming SE 5 ft at 8 seconds. A chance of tstms.
Showers.
.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Seas 5 to
6 ft, subsiding to 4 to 6 ft after midnight. Wave Detail: SE 5 ft
at 7 seconds, becoming SE 6 ft at 7 seconds. Showers with a
chance of tstms.
.TUE...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft
at 8 seconds. Showers likely with a chance of tstms in the
morning, then a chance of showers with a slight chance of tstms
in the afternoon.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SE 4 ft at 8 seconds. Showers likely with a chance of tstms.
.WED...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
8 seconds. A chance of showers. A chance of tstms in the
afternoon.
.WED NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 7 seconds and S 1 foot at 4 seconds. A chance of showers and
tstms, mainly in the evening.
.THU...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.FRI...SW winds 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

$$

AMZ354-122030-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
402 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM EDT THIS AFTERNOON
THROUGH LATE TONIGHT...

.TODAY...SE winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft, building to 4 to 6 ft this afternoon. Wave Detail: SE 5 ft
at 7 seconds. A chance of tstms. Showers.
.TONIGHT...S winds 15 to 20 kt, diminishing to 10 to 15 kt after
midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight.
Wave Detail: SE 6 ft at 7 seconds, becoming SE 5 ft at 7 seconds.
A chance of tstms. Showers, mainly in the evening.
.TUE...SW winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: SE 5 ft
at 8 seconds. A chance of showers. A chance of tstms, mainly in
the morning.
.TUE NIGHT...SW winds 10 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 8 seconds. A chance of showers. A chance of tstms, mainly in
the evening.
.WED...SW winds 10 kt, becoming S in the afternoon. Seas 2 to
3 ft. Wave Detail: SE 3 ft at 8 seconds and S 1 foot at
4 seconds. A slight chance of showers in the morning, then a
chance of showers and tstms in the afternoon.
.WED NIGHT...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and S 2 ft at 4 seconds. A chance of showers and
tstms in the evening, then a slight chance of showers after
midnight.
.THU...SW winds 10 kt. Seas 2 to 3 ft.
.THU NIGHT...SW winds 10 kt. Seas 2 to 3 ft.
.FRI...SW winds 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SW winds 10 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

$$

AMZ374-122030-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
402 AM EDT Mon May 12 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON...

.TODAY...SE winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6
ft, building to 5 to 7 ft this afternoon. Wave Detail: SE 5 ft at
7 seconds, becoming SE 6 ft at 7 seconds. A chance of tstms.
Showers.
.TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Seas 6 to
7 ft, subsiding to 5 to 7 ft after midnight. Wave Detail: SE 6 ft
at 7 seconds, becoming SE 7 ft at 8 seconds. A chance of tstms.
Showers.
.TUE...SW winds 10 to 15 kt. Seas 4 to 6 ft, subsiding to 4 to
5 ft in the afternoon. Wave Detail: SE 6 ft at 8 seconds,
becoming SE 5 ft at 8 seconds. A chance of showers. A chance of
tstms, mainly in the morning.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail:
SE 4 ft at 8 seconds. A chance of showers and tstms.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE 4 ft
at 8 seconds and SW 2 ft at 4 seconds. A chance of showers in the
morning, then a slight chance of showers and tstms in the
afternoon.
.WED NIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
3 ft at 8 seconds and SW 2 ft at 4 seconds. A slight chance of
showers and tstms.
.THU...SW winds 10 kt. Seas 3 to 4 ft.
.THU NIGHT...SW winds 10 kt. Seas 3 to 4 ft.
.FRI...SW winds 10 kt. Seas 3 to 4 ft.
.FRI NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

Winds and seas higher in and near tstms.

$$