820
FZUS52 KCHS 301754
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
154 PM EDT Mon Jun 30 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

AMZ300-010615-
154 PM EDT Mon Jun 30 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A front is expected to move into the area by Wednesday and could
then linger in the vicinity into the weekend.

$$

AMZ330-010615-
Charleston Harbor-
154 PM EDT Mon Jun 30 2025

.THIS AFTERNOON...S winds 10 to 15 kt with gusts to 20 kt. A
slight chance of showers and tstms.
.TONIGHT...S winds 10 to 15 kt. A slight chance of showers and
tstms in the evening.
.TUE...SW winds 10 to 15 kt with gusts to 20 kt. A chance of
showers and tstms.
.TUE NIGHT...SW winds 10 to 15 kt. A chance of showers and tstms.
.WED...SW winds 10 kt. A chance of showers and tstms in the
morning, then showers and tstms likely in the afternoon.
.WED NIGHT...SW winds 5 to 10 kt. Showers and tstms likely,
mainly in the evening.
.THU...SW winds 5 to 10 kt. A chance of showers and tstms.
.THU NIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms.
.FRI...E winds 5 to 10 kt. A chance of showers and tstms.
.FRI NIGHT...SE winds 5 to 10 kt. A slight 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 85 degrees.

$$

AMZ350-010615-
Waters from South Santee River to Edisto Beach SC out 20 NM-
154 PM EDT Mon Jun 30 2025

.THIS AFTERNOON...S winds 10 to 15 kt with gusts to 20 kt. Seas 2
to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 9
seconds. A slight chance of showers and tstms.
.TONIGHT...SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: S 4 ft at 6 seconds and SE 2 ft at 9 seconds. A
slight chance of showers and tstms.
.TUE...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft,
building to 4 to 5 ft in the afternoon. Wave Detail: SE 4 ft at
7 seconds. A chance of showers and tstms.
.TUE NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to
5 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: S 4 ft
at 5 seconds and E 1 foot at 8 seconds. A chance of showers and
tstms in the evening, then showers and tstms likely after
midnight.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft
at 5 seconds and E 1 foot at 8 seconds. Showers and tstms likely.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft
at 5 seconds and SE 2 ft at 8 seconds. Showers and tstms likely.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.FRI NIGHT...SE winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-010615-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
154 PM EDT Mon Jun 30 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 2 ft. Wave Detail: S
2 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of
showers and tstms late.
.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to
3 ft. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds.
A chance of showers and tstms.
.TUE...SW winds 10 to 15 kt with gusts to 25 kt. Seas 3 to 4 ft.
Wave Detail: S 3 ft at 5 seconds and E 2 ft at 9 seconds. A
chance of showers and tstms.
.TUE NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and E
1 foot at 8 seconds. Showers and tstms likely.
.WED...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft at
5 seconds and E 1 foot at 8 seconds. Showers and tstms likely.
.WED NIGHT...SW winds 10 to 15 kt, diminishing to 5 to 10 kt
after midnight. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds
and SE 2 ft at 8 seconds. Showers and tstms likely.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.
.FRI...NE winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.FRI NIGHT...E winds 10 kt. Seas 2 ft. A chance of showers and
tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-010615-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
154 PM EDT Mon Jun 30 2025

.THIS AFTERNOON...S winds 5 to 10 kt, increasing to 10 to 15 kt
late. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at
9 seconds. A slight chance of showers and tstms.
.TONIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft
at 4 seconds and E 2 ft at 8 seconds. A chance of showers and
tstms, mainly in the evening.
.TUE...SW winds 10 to 15 kt, becoming S 15 to 20 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds and E
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.
.TUE NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: S 4 ft at 5 seconds and E 1 foot at 8 seconds.
Showers and tstms likely, mainly in the evening.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 5 seconds and E 1 foot at 8 seconds. A chance of showers and
tstms in the morning, then showers and tstms likely in the
afternoon.
.WED NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 5 seconds and SE 2 ft at 8 seconds. Showers and tstms
likely, mainly in the evening.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.THU NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers
and tstms.
.FRI...E winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.FRI NIGHT...E winds 10 kt. Seas 2 ft. A chance of showers and
tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-010615-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
154 PM EDT Mon Jun 30 2025

.THIS AFTERNOON...S winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 2
ft at 4 seconds and E 2 ft at 8 seconds. A chance of showers and
tstms early.
.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 E 2 ft at 9 seconds. A
chance of showers and tstms.
.TUE...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: SW 3 ft at 5 seconds and E 2 ft at 9 seconds. A
chance of showers and tstms.
.TUE NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Seas 3 to
4 ft. Wave Detail: S 4 ft at 5 seconds and E 2 ft at 8 seconds.
Showers and tstms likely.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft
at 5 seconds and E 2 ft at 8 seconds. Showers and tstms likely.
.WED NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S
3 ft at 5 seconds and SE 3 ft at 8 seconds. Showers and tstms
likely.
.THU...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.THU NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.FRI...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.FRI NIGHT...E winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$