286
FZUS52 KCHS 100517
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
117 AM EDT Thu Apr 10 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

AMZ300-101815-
117 AM EDT Thu Apr 10 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail across our region through Thursday. A
cold front will move through our area Friday into Friday night,
followed by High pressure dominating the weather pattern this
weekend into early next week.

$$

AMZ330-101815-
Charleston Harbor-
117 AM EDT Thu Apr 10 2025

.REST OF TONIGHT...NE winds 10 to 15 kt.
.THU...NE winds 5 to 10 kt, becoming E in the afternoon.
.THU NIGHT...SE winds 5 to 10 kt, becoming S after midnight. A
chance of showers after midnight.
.FRI...SW winds 10 to 15 kt with gusts to 20 kt. A chance of
showers.
.FRI NIGHT...W winds 10 to 15 kt. A chance of showers in the
evening.
.SAT...NW winds 10 kt. A slight chance of showers in the
afternoon.
.SAT NIGHT...N winds 10 kt. A slight chance of showers in the
evening.
.SUN...NW winds 10 to 15 kt.
.SUN NIGHT...W winds 5 to 10 kt.
.MON...SW winds 10 to 15 kt.
.MON NIGHT...SW winds 10 to 15 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 69 degrees.

$$

AMZ350-101815-
Waters from South Santee River to Edisto Beach SC out 20 NM-
117 AM EDT Thu Apr 10 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...E winds 10 to 15 kt with gusts to 20 kt. Seas
4 to 6 ft. Wave Detail: E 6 ft at 8 seconds.
.THU...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 9 seconds.
.THU NIGHT...SE winds 10 kt, becoming S with gusts to 20 kt after
midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds. A
chance of showers after midnight.
.FRI...SW winds 15 to 20 kt. Seas 3 to 4 ft, building to 4 to
5 ft in the afternoon. Wave Detail: E 4 ft at 8 seconds and SW
3 ft at 4 seconds, becoming SW 3 ft at 5 seconds and E 3 ft at
8 seconds. A chance of showers.
.FRI NIGHT...W winds 15 kt, becoming NW after midnight. Seas 3 to
4 ft. Wave Detail: SW 3 ft at 5 seconds and E 3 ft at 8 seconds.
A chance of showers in the evening.
.SAT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft
at 5 seconds and E 2 ft at 7 seconds. A slight chance of showers
in the afternoon.
.SAT NIGHT...N winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers.
.SUN...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 ft.
.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.MON NIGHT...SW winds 15 to 20 kt. Seas 2 to 3 ft.

$$

AMZ352-101815-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
117 AM EDT Thu Apr 10 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds 15 to 20 kt. Seas 4 to 6 ft. Wave
Detail: E 6 ft at 8 seconds.
.THU...NE winds 10 to 15 kt, becoming E 5 to 10 kt in the
afternoon. Seas 4 to 5 ft. Wave Detail: E 5 ft at 9 seconds.
.THU NIGHT...SE winds 10 kt, becoming S with gusts to 20 kt after
midnight. Seas 3 to 4 ft. Wave Detail: E 4 ft at 9 seconds. A
chance of showers after midnight.
.FRI...SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 8 seconds and SW 2 ft at 3 seconds. A chance of
showers.
.FRI NIGHT...W winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft,
subsiding to 2 to 3 ft after midnight. Wave Detail: E 3 ft at
8 seconds and SW 2 ft at 5 seconds, becoming E 3 ft at 8 seconds
and W 2 ft at 5 seconds. A chance of showers in the evening.
.SAT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft
at 3 seconds and E 2 ft at 8 seconds. A slight chance of showers
in the afternoon.
.SAT NIGHT...N winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance
of showers in the evening.
.SUN...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 ft.
.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

$$

AMZ354-101815-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
117 AM EDT Thu Apr 10 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 AM EDT EARLY THIS
MORNING...

.REST OF TONIGHT...NE winds 15 to 20 kt. Seas 4 to 5 ft. Wave
Detail: E 5 ft at 7 seconds.
.THU...E winds 10 to 15 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 8 seconds. A slight chance of showers.
.THU NIGHT...SE winds 10 kt, becoming S after midnight. Seas 4 to
5 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: E 5 ft
at 10 seconds, becoming E 4 ft at 10 seconds. A slight chance of
showers after midnight.
.FRI...SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 9 seconds and SW 2 ft at 3 seconds. A chance of
showers.
.FRI NIGHT...NW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft,
subsiding to 2 to 3 ft after midnight. Wave Detail: E 3 ft at
8 seconds and SW 2 ft at 3 seconds, becoming E 3 ft at 8 seconds
and W 2 ft at 3 seconds. A chance of showers in the evening.
.SAT...NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds and NW 2 ft at 3 seconds.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN...N winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft.
.MON...SW winds 10 kt. Seas 2 ft.
.MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

$$

AMZ374-101815-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
117 AM EDT Thu Apr 10 2025

...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING...

.REST OF TONIGHT...NE winds 15 to 20 kt, diminishing 10 to 15 kt
late. Seas 6 to 8 ft. Wave Detail: E 7 ft at 8 seconds and E 1
foot at 12 seconds. A slight chance of showers.
.THU...NE winds 10 to 15 kt, becoming E 5 to 10 kt in the
afternoon. Seas 6 to 8 ft, subsiding to 5 to 7 ft in the
afternoon. Wave Detail: E 7 ft at 9 seconds, becoming E 7 ft at
10 seconds.
.THU NIGHT...SE winds 5 to 10 kt, becoming S 10 to 15 kt after
midnight. Seas 5 to 6 ft, subsiding to 4 to 5 ft after midnight.
Wave Detail: E 6 ft at 9 seconds, becoming E 5 ft at 9 seconds. A
slight chance of showers after midnight.
.FRI...SW winds 15 to 20 kt. Seas 4 to 5 ft. Wave Detail: E 5 ft
at 8 seconds and SW 3 ft at 4 seconds. A chance of showers.
.FRI NIGHT...W winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 8 seconds and W 3 ft at 4 seconds. A chance of showers,
mainly in the evening.
.SAT...NW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft
at 4 seconds and E 3 ft at 8 seconds. A slight chance of showers.
.SAT NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft. A slight
chance of showers.
.SUN...N winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN NIGHT...W winds 5 kt. Seas 2 to 3 ft.
.MON...SW winds 5 to 10 kt. Seas 2 ft.
.MON NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.

$$