912
FZUS52 KCHS 161731
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
131 PM EDT Wed Jul 16 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

AMZ300-170630-
131 PM EDT Wed Jul 16 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Atlantic high pressure will prevail through early next week.

$$

AMZ330-170630-
Charleston Harbor-
131 PM EDT Wed Jul 16 2025

.THIS AFTERNOON...S winds 10 kt, increasing to 15 kt late. A
chance of showers and tstms early, then a slight chance of
showers and tstms late.
.TONIGHT...S winds 10 kt.
.THU...S winds 10 to 15 kt. A slight chance of showers and tstms
in the morning.
.THU NIGHT...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. A slight chance of showers and tstms.
.SAT NIGHT...SW winds 10 kt.
.SUN...SW winds 5 to 10 kt. A slight chance of showers and tstms.
.SUN NIGHT...SW winds 5 to 10 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 86 degrees.

$$

AMZ350-170630-
Waters from South Santee River to Edisto Beach SC out 20 NM-
131 PM EDT Wed Jul 16 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 6 seconds. A chance of showers and tstms
early.
.TONIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.THU...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft at
6 seconds. A slight chance of showers and tstms in the morning.
.THU NIGHT...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. A slight chance of
showers and tstms.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft. 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.

Winds and seas higher in and near tstms.

$$

AMZ352-170630-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
131 PM EDT Wed Jul 16 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 6 seconds. A chance of showers and tstms
early.
.TONIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.THU...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
6 seconds. A slight chance of showers and tstms in the morning.
.THU NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.FRI...SW winds 5 to 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 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 3 ft.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.SUN NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-170630-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
131 PM EDT Wed Jul 16 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 6 seconds. A slight chance of showers and
tstms early.
.TONIGHT...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SE
4 ft at 6 seconds.
.THU...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft at
6 seconds. A slight chance of showers and tstms in the morning.
.THU NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 6 seconds.
.FRI...S winds 10 to 15 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 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds. A slight chance of showers and tstms in the
evening.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.SUN...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.SUN NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-170630-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
131 PM EDT Wed Jul 16 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: SE 4 ft at 6 seconds. A slight chance of showers and
tstms. Vsby 1 to 3 NM early.
.TONIGHT...S winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: SE 4 ft at 6 seconds.
.THU...S winds 10 kt. Seas 3 ft. Wave Detail: SE 3 ft at
6 seconds. A slight chance of showers and tstms in the morning.
.THU NIGHT...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 7 seconds.
.FRI...SW winds 5 to 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.
.SAT NIGHT...SW winds 10 kt. Seas 3 ft.
.SUN...SW winds 10 to 15 kt. Seas 3 ft.
.SUN NIGHT...SW winds 10 kt. Seas 3 ft. A chance of showers and
tstms.

Winds and seas higher in and near tstms.

$$