406
FZUS52 KCHS 171643
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1243 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

AMZ300-180500-
1243 PM EDT Tue Jun 17 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Atlantic high pressure will continue to build across the
Southeast through the week. A cold front could approach the
region late week, though most indications are for the front to
stall to our northwest.

$$

AMZ330-180500-
Charleston Harbor-
1243 PM EDT Tue Jun 17 2025

.THIS AFTERNOON...SW winds 10 kt, becoming S with gusts to 20 kt
late.
.TONIGHT...SW winds 10 to 15 kt.
.WED...SW winds 10 to 15 kt.
.WED NIGHT...SW winds 10 to 15 kt.
.THU...SW winds 10 to 15 kt. A chance of showers and tstms in the
afternoon.
.THU NIGHT...SW winds 10 to 15 kt. A chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. A chance of showers and tstms.
.FRI NIGHT...SW winds 5 to 10 kt. 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.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 82 degrees.

$$

AMZ350-180500-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1243 PM EDT Tue Jun 17 2025

.THIS AFTERNOON...SW winds 10 to 15 kt with gusts to 20 kt. Seas
3 to 4 ft. Wave Detail: S 3 ft at 7 seconds.
.TONIGHT...SW winds 15 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, increasing to 15 to 20 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: S 4 ft at 7 seconds.
.WED NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail:
SW 4 ft at 5 seconds and SE 2 ft at 8 seconds.
.THU...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. 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.
.THU NIGHT...SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail:
SW 3 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of
showers and tstms.
.FRI...SW winds 10 to 15 kt. Seas 3 to 4 ft. 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 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.SAT NIGHT...S winds 10 kt. Seas 2 ft. A slight chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-180500-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1243 PM EDT Tue Jun 17 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and S 2 ft at 5 seconds.
.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 with gusts to 20 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 2 ft at 8 seconds. A
slight chance of showers and tstms after midnight.
.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.
.THU NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft.
Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 8 seconds. A
chance of showers and tstms.
.FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. 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 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.SAT NIGHT...S winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-180500-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1243 PM EDT Tue Jun 17 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave
Detail: SE 3 ft at 8 seconds and S 2 ft at 5 seconds.
.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 2 ft at 8 seconds. A slight chance of showers
and tstms in the afternoon.
.WED NIGHT...S winds 15 kt with gusts to 20 kt. Seas 3 ft. Wave
Detail: S 3 ft at 5 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 chance of showers and
tstms in the afternoon.
.THU NIGHT...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 chance of showers
and tstms.
.FRI...SW winds 5 to 10 kt. Seas 2 to 3 ft. 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 5 to 10 kt. Seas 2 ft. A chance of showers and
tstms.
.SAT NIGHT...S winds 10 kt. Seas 2 ft.

Winds and seas higher in and near tstms.

$$

AMZ374-180500-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1243 PM EDT Tue Jun 17 2025

.THIS AFTERNOON...S winds 10 to 15 kt. Seas 3 ft. Wave Detail: SE
3 ft at 8 seconds and S 2 ft at 4 seconds.
.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 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. 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.
.THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft.
Wave Detail: S 3 ft at 4 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 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.
.FRI NIGHT...S winds 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.
.SAT NIGHT...S winds 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$