597
FZUS52 KCHS 171904
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
304 PM EDT Tue Jun 17 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

AMZ300-180815-
304 PM EDT Tue Jun 17 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure in the Atlantic will prevail across the Southeast
this week. A cold front could approach, then pass just to our
north later this week.

$$

AMZ330-180815-
Charleston Harbor-
304 PM EDT Tue Jun 17 2025

.TONIGHT...SW winds 10 to 15 kt. Gusts to 20 kt through early
evening.
.WED...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. A slight chance of showers and tstms in the afternoon.
.WED NIGHT...SW winds 15 kt with gusts to 20 kt. A slight chance
of showers and tstms in the evening.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
to 25 kt in the afternoon. Waves 1 to 2 ft. A slight chance of
showers and tstms in the afternoon.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. A slight
chance of showers and tstms in the evening, then a chance of
showers and tstms after midnight.
.FRI...SW winds 5 to 10 kt, increasing to 10 to 15 kt in the
afternoon. A chance of showers and tstms.
.FRI NIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. A chance of showers and tstms.
.SAT...SW winds 5 to 10 kt. A chance of showers and tstms.
.SAT NIGHT...S winds 5 to 10 kt.
.SUN...SW winds 5 to 10 kt. A slight chance of showers and tstms.
.SUN NIGHT...SW winds 5 to 10 kt.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 81 degrees.

$$

AMZ350-180815-
Waters from South Santee River to Edisto Beach SC out 20 NM-
304 PM EDT Tue Jun 17 2025

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

Winds and seas higher in and near tstms.

$$

AMZ352-180815-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
304 PM EDT Tue Jun 17 2025

.TONIGHT...S winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 8 seconds.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft
at 5 seconds and SE 2 ft at 8 seconds.
.WED NIGHT...S winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: S 3 ft at 5 seconds and SE 3 ft at 8 seconds.
.THU...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 8 seconds. A
slight chance of showers and tstms in the afternoon.
.THU NIGHT...SW winds 15 to 20 kt. Seas 3 ft. Wave Detail: S 3 ft
at 5 seconds and SE 1 foot at 8 seconds. A slight chance of
showers and tstms in the evening, then a chance of showers and
tstms after midnight.
.FRI...SW winds 10 to 15 kt, becoming S 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and
SE 2 ft at 8 seconds. A chance of showers and tstms.
.FRI NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.SAT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SAT NIGHT...S winds 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.SUN...S winds 10 kt. Seas 2 ft. A slight chance of showers and
tstms.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ354-180815-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
304 PM EDT Tue Jun 17 2025

.TONIGHT...S winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 8 seconds.
.WED...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 5 seconds and SE 3 ft at 8 seconds.
.WED NIGHT...S winds 15 to 20 kt. Seas 3 ft. Wave Detail: S 3 ft
at 4 seconds and SE 3 ft at 8 seconds.
.THU...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft
at 5 seconds and SE 2 ft at 8 seconds. A slight chance of showers
and tstms in the afternoon.
.THU NIGHT...S winds 15 to 20 kt, becoming SW 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE
2 ft at 8 seconds. A slight chance of showers and tstms in the
evening, then a chance of showers and tstms after midnight.
.FRI...SW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at
8 seconds. A chance of showers and tstms.
.FRI NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.SAT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SAT NIGHT...S winds 10 to 15 kt. Seas 2 ft. A slight chance of
showers and tstms.
.SUN...S winds 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SUN NIGHT...S winds 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ374-180815-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
304 PM EDT Tue Jun 17 2025

.TONIGHT...S winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft.
Wave Detail: S 3 ft at 4 seconds and SE 3 ft at 8 seconds.
.WED...S 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.
.WED NIGHT...S winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: S
3 ft at 4 seconds and SE 3 ft at 8 seconds. A slight chance of
showers and tstms after midnight.
.THU...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. A slight chance of showers
and tstms in the morning.
.THU NIGHT...S winds 15 to 20 kt. Seas 3 ft. Wave Detail: S 3 ft
at 5 seconds and SE 3 ft at 8 seconds. A slight chance of showers
and tstms in the evening, then a chance of showers and tstms
after midnight.
.FRI...SW winds 10 to 15 kt, becoming S 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and
SE 3 ft at 8 seconds. A chance of showers and tstms.
.FRI NIGHT...S winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.SAT...S winds 10 kt. Seas 2 to 3 ft. A chance of showers and
tstms.
.SAT NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.SUN...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.SUN NIGHT...S winds 10 kt. Seas 2 ft. A slight chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$