478
FZUS52 KCHS 161850
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
250 PM EDT Fri May 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

AMZ300-170730-
250 PM EDT Fri May 16 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
Broad high pressure will persist through the weekend. A weak cold
front may push over the region early next week, remaining
generally stationary through Tuesday. A stronger cold front is
timed to sweep across the region Wednesday into Wednesday night.

$$

AMZ330-170730-
Charleston Harbor-
250 PM EDT Fri May 16 2025

.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt, diminishing
to 5 to 10 kt late this evening.
.SAT...SW winds 10 to 15 kt. A slight chance of showers and tstms
in the afternoon.
.SAT NIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming W
5 to 10 kt after midnight.
.SUN...W winds 5 to 10 kt.
.SUN NIGHT...SW winds 5 to 10 kt.
.MON...NW winds 5 to 10 kt, becoming S in the afternoon. A slight
chance of showers and tstms in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms in the evening.
.TUE...SW winds 5 to 10 kt.
.TUE NIGHT...SW winds 10 kt.
.WED...SW winds 10 to 15 kt. A chance of showers and tstms.
.WED NIGHT...SW winds 10 to 15 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 78 degrees.

$$

AMZ350-170730-
Waters from South Santee River to Edisto Beach SC out 20 NM-
250 PM EDT Fri May 16 2025

.TONIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW
3 ft at 5 seconds and SE 2 ft at 8 seconds.
.SAT...SW winds 10 to 15 kt, increasing to 15 to 20 kt with gusts
to 25 kt in the afternoon. Seas 2 to 3 ft, building to 3 to 4 ft
in the afternoon. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft
at 8 seconds, becoming SW 4 ft at 5 seconds and SE 2 ft at
8 seconds.
.SAT NIGHT...SW winds 15 to 20 kt with gusts to 25 kt, becoming W
10 to 15 kt after midnight. Seas 3 to 4 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: SW 4 ft at 5 seconds and SE
2 ft at 8 seconds, becoming SW 3 ft at 5 seconds and SE 2 ft at
8 seconds.
.SUN...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at
5 seconds and SE 2 ft at 8 seconds.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SW 2 ft
at 5 seconds and SE 2 ft at 8 seconds. A slight chance of showers
and tstms.
.MON...NW winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
5 seconds. A slight chance of showers and tstms in the afternoon.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...SW winds 15 to 20 kt. Seas 4 to 5 ft. A chance of showers
and tstms.
.WED NIGHT...SW winds 15 to 20 kt. Seas 4 to 5 ft. A chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-170730-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
250 PM EDT Fri May 16 2025

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

Winds and seas higher in and near tstms.

$$

AMZ354-170730-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
250 PM EDT Fri May 16 2025

.TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 4 seconds and SE 2 ft at 8 seconds.
.SAT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 8 seconds.
.SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft
at 4 seconds and SE 2 ft at 8 seconds.
.SUN...W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 8 seconds.
.SUN NIGHT...S winds 10 kt, becoming SW after midnight. Seas
2 ft. Wave Detail: SE 2 ft at 8 seconds and S 1 foot at
4 seconds.
.MON...W winds 5 to 10 kt, becoming S in the afternoon. Seas
2 ft. Wave Detail: S 1 foot at 4 seconds and SE 1 foot at
8 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...SW winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.WED NIGHT...SW winds 15 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-170730-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
250 PM EDT Fri May 16 2025

.TONIGHT...SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 2 ft
at 4 seconds and SE 2 ft at 8 seconds.
.SAT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft
at 4 seconds and SE 2 ft at 8 seconds.
.SAT NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 3 ft at 4 seconds and SE 2 ft at 8 seconds.
.SUN...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and SE 2 ft at
8 seconds.
.SUN NIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 2 ft at 8 seconds.
.MON...W winds 5 to 10 kt, becoming SW in the afternoon. Seas
2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds.
.MON NIGHT...S winds 5 to 10 kt. Seas 2 ft.
.TUE...SW winds 5 to 10 kt. Seas 2 ft.
.TUE NIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...SW winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of
showers and tstms.
.WED NIGHT...SW winds 15 kt. Seas 4 to 5 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$