FZUS52 KCHS 210939

CWFCHS



Coastal Waters Forecast

National Weather Service Charleston SC

538 AM EDT Sun Jun 21 2026



South Santee River SC to Altamaha Sound GA out 60 NM, including

Charleston Harbor and Grays Reef National Marine Sanctuary



AMZ300-212300-

538 AM EDT Sun Jun 21 2026



.Synopsis for the coastal waters of south coastal South Carolina

and north coastal Georgia...

Broad high pressure will reside over the area through Monday. A

cold front will approach the area Monday night into Tuesday and

stall across southeast South Carolina and southeast Georgia

through the end of the week.



$$



AMZ340-212300-

Charleston Harbor-

538 AM EDT Sun Jun 21 2026



.TODAY...NW winds 5 kt, becoming S this afternoon. A slight

chance of showers and tstms late. 

.TONIGHT...SW winds 5 to 10 kt. 

.MON...W winds 5 to 10 kt, becoming SW 10 to 15 kt with gusts to

20 kt in the afternoon. 

.MON NIGHT...SW winds 10 to 15 kt. A slight chance of showers and

tstms in the evening. 

.TUE...W winds 10 kt, becoming SW with gusts to 20 kt in the

afternoon. A slight chance of showers. A slight chance of tstms

in the afternoon. 

.TUE NIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming W

5 kt after midnight. A slight chance of showers and tstms. 

.WED...NE winds 5 to 10 kt. A chance of showers and tstms. 

.WED NIGHT...S winds 5 to 10 kt. A chance of showers and tstms. 

.THU...S winds 5 to 10 kt. A chance of showers and tstms. 

.THU 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 82 degrees. 



$$



AMZ360-212300-

Coastal waters from South Santee River to Edisto Beach SC out

20 NM-

538 AM EDT Sun Jun 21 2026



.TODAY...W winds 5 kt, becoming S this afternoon. Seas 2 ft. Wave

Detail: SE 2 ft at 7 seconds. 

.TONIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at

6 seconds. 

.MON...W winds 10 to 15 kt, becoming SW 15 to 20 kt with gusts to

25 kt in the afternoon. Seas 2 ft, building to 3 to 4 ft in the

afternoon. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at

7 seconds, becoming SW 3 ft at 4 seconds and SE 1 foot at

7 seconds. 

.MON NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to

4 ft. Wave Detail: S 4 ft at 6 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.

Wave Detail: S 4 ft at 6 seconds. A slight chance of showers and

tstms in the afternoon. 

.TUE 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

1 foot at 8 seconds, becoming SW 3 ft at 5 seconds and SE 1 foot

at 8 seconds. A slight chance of showers and tstms. 

.WED...NE winds 5 to 10 kt. Seas 2 ft. 

.WED NIGHT...SE winds 5 to 10 kt. Seas 2 ft. A chance of showers

and tstms. 

.THU...S winds 10 to 15 kt. Seas 2 ft. A slight chance of showers

and tstms. 

.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of

showers and tstms.  



Winds and seas higher in and near tstms.



$$



AMZ362-212300-

Coastal waters from Edisto Beach SC to Savannah GA out 20 NM-

538 AM EDT Sun Jun 21 2026



.TODAY...W winds 5 kt, becoming SW this afternoon. Seas 2 ft.

Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 3 seconds. 

.TONIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at

7 seconds and SW 1 foot at 4 seconds. A slight chance of showers

and tstms in the evening. 

.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft

at 3 seconds and SE 1 foot at 7 seconds. 

.MON NIGHT...SW winds 15 kt with gusts to 20 kt. Seas 2 to 3 ft.

Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 7 seconds. 

.TUE...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft.

Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 7 seconds. A

chance of showers and tstms in the afternoon. 

.TUE NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW

3 ft at 4 seconds and SE 2 ft at 7 seconds. A chance of showers

and tstms, mainly in the evening. 

.WED...W winds 5 to 10 kt. Seas 2 ft. 

.WED NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers

and tstms. 

.THU...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers

and tstms. 

.THU NIGHT...SW winds 10 to 15 kt. Seas 2 ft. A chance of showers

and tstms.  



Winds and seas higher in and near tstms.



$$



AMZ364-212300-

Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm,

including Grays Reef National Marine Sanctuary-

538 AM EDT Sun Jun 21 2026



.TODAY...W winds 5 to 10 kt, becoming S late. Seas 1 foot or

less, then around 2 ft this afternoon. Wave Detail: SW 1 foot at

4 seconds and SE 1 foot at 7 seconds. A slight chance of showers

and tstms late. 

.TONIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: S 1 foot at

3 seconds and SE 1 foot at 7 seconds. A chance of showers with a

slight chance of tstms in the evening. 

.MON...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: SW 2 ft at

3 seconds and SE 1 foot at 7 seconds. A slight chance of showers

and tstms in the afternoon. 

.MON NIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Seas 2 ft.

Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 7 seconds. A

slight chance of showers and tstms in the evening. 

.TUE...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft

at 4 seconds and SE 1 foot at 7 seconds. A chance of showers and

tstms in the afternoon. 

.TUE NIGHT...W winds 10 to 15 kt. Seas 2 ft. Wave Detail: SW 2 ft

at 4 seconds and SE 2 ft at 7 seconds. A chance of showers and

tstms, mainly in the evening. 

.WED...SW winds 5 to 10 kt. Seas 2 ft. 

.WED NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers

and tstms. 

.THU...SW winds 5 to 10 kt. Seas 2 ft. A chance of showers and

tstms. 

.THU NIGHT...SW winds 10 kt. Seas 2 ft. A chance of showers and

tstms.  



Winds and seas higher in and near tstms.



$$



AMZ380-212300-

Waters from South Santee River SC to Edisto Beach SC extending

from 20 to 60 NM-

538 AM EDT Sun Jun 21 2026



.TODAY...NW winds 5 kt, becoming S this afternoon. Seas 2 ft.

Wave Detail: SE 2 ft at 7 seconds and SW 1 foot at 4 seconds. 

.TONIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at

6 seconds. 

.MON...W winds 10 to 15 kt, becoming SW 15 to 20 kt in the

afternoon. Seas 2 to 3 ft, building to 3 to 4 ft in the

afternoon. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at

7 seconds, becoming SW 3 ft at 4 seconds and SE 2 ft at

7 seconds. A slight chance of showers and tstms in the morning. 

.MON NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to

5 ft. Wave Detail: S 4 ft at 6 seconds. A slight chance of

showers and tstms. 

.TUE...SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft.

Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 8 seconds. A

slight chance of showers and tstms. 

.TUE NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after

midnight. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.

Wave Detail: SW 4 ft at 5 seconds and SE 1 foot at 8 seconds,

becoming SW 3 ft at 5 seconds and SE 2 ft at 8 seconds. A chance

of showers and tstms. 

.WED...N winds 5 to 10 kt. Seas 2 to 3 ft. 

.WED NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of

showers and tstms. 

.THU...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers

with a slight chance of tstms. 

.THU NIGHT...SW winds 10 to 15 kt. Seas 3 to 4 ft. Showers likely

with a chance of tstms.  



Winds and seas higher in and near tstms.



$$



AMZ382-212300-

Waters from Edisto Beach SC to Savannah GA extending from 20 to

60 NM-

538 AM EDT Sun Jun 21 2026



.TODAY...W winds 5 to 10 kt, becoming SWlate. Seas 2 ft. Wave

Detail: SE 2 ft at 7 seconds and W 1 foot at 4 seconds. 

.TONIGHT...SW winds 10 kt. Seas 2 ft. Wave Detail: SW 2 ft at

3 seconds and SE 2 ft at 7 seconds. 

.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft

at 4 seconds and SE 1 foot at 7 seconds. A slight chance of

showers and tstms in the morning. 

.MON NIGHT...SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to

4 ft. Wave Detail: S 4 ft at 6 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.

Wave Detail: W 3 ft at 5 seconds and SE 1 foot at 7 seconds. A

slight chance of tstms. A slight chance of showers in the

morning, then a chance of showers in the afternoon. 

.TUE NIGHT...SW winds 15 to 20 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 3 ft at 4 seconds and SE 1 foot at 8 seconds,

becoming SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. A chance

of showers and tstms. 

.WED...W winds 5 to 10 kt. Seas 2 to 3 ft. 

.WED NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers

and tstms. 

.THU...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers

and tstms. 

.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of

showers and tstms.  



Winds and seas higher in and near tstms.



$$



AMZ384-212300-

Waters from Savannah GA to Altamaha Sound GA extending from 20 to

60 NM-

538 AM EDT Sun Jun 21 2026



.TODAY...W winds 5 to 10 kt, becoming SW late. Seas 2 ft. Wave

Detail: SE 2 ft at 7 seconds and W 1 foot at 4 seconds. 

.TONIGHT...SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft

at 7 seconds and SW 1 foot at 3 seconds. A slight chance of

showers and tstms in the evening. 

.MON...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft

at 3 seconds and SE 2 ft at 7 seconds. A slight chance of showers

and tstms in the morning. 

.MON NIGHT...SW winds 15 kt with gusts to 20 kt. Seas 2 to 3 ft.

Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 7 seconds. 

.TUE...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft

at 4 seconds and SE 2 ft at 7 seconds. A slight chance of showers

and tstms in the afternoon. 

.TUE NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:

SW 2 ft at 4 seconds and SE 2 ft at 7 seconds. A slight chance of

showers and tstms. 

.WED...W winds 5 to 10 kt. Seas 2 ft. 

.WED NIGHT...S winds 5 to 10 kt. Seas 2 ft. A chance of showers

and tstms. 

.THU...SW winds 5 to 10 kt. Seas 2 ft. 

.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. A chance of

showers and tstms.  



Winds and seas higher in and near tstms.



$$