National Weather Service Marine Forecast FZUS52 KCHS

FZUS52 KCHS 210939
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
539 AM EDT Fri Aug 21 2026

South Santee River SC to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary

AMZ300-212300
539 AM EDT Fri Aug 21 2026

.Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... Typical summertime conditions will persist across the local waters through the weekend. Southwest winds could increase late in the weekend as a front settles into the region.

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AMZ340-212300
Charleston Harbor
539 AM EDT Fri Aug 21 2026

TODAY
SW winds 5 to 10 kt, becoming S 10 to 15 kt late. A slight chance of showers and tstms early this afternoon.

TONIGHT
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, increasing to 10 to 15 kt in the afternoon. A chance of tstms. A chance of showers in the morning, then showers likely in the afternoon.

SAT NIGHT
SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Showers likely with a chance of tstms.

SUN
SW winds 5 to 10 kt. A slight chance of showers and tstms in the morning.

SUN NIGHT
SW winds 5 to 10 kt.

MON
S winds 5 to 10 kt.

MON NIGHT
S winds 5 to 10 kt.

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

TUE 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 88 degrees.

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AMZ360-212300
Coastal waters from South Santee River to Edisto Beach SC out 20 NM
539 AM EDT Fri Aug 21 2026

TODAY
SW winds 5 to 10 kt, becoming S 10 to 15 kt late. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds.

TONIGHT
S 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 1 foot at 8 seconds. A chance of showers and tstms.

SAT
SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of tstms. A chance of showers.

SAT NIGHT
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 1 foot at 9 seconds. Showers likely with a chance of tstms.

SUN
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers and tstms, mainly in the morning.

SUN NIGHT
SW winds 10 to 15 kt with gusts to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms.

MON
S winds 5 to 10 kt. Seas 2 to 3 ft.

MON NIGHT
S winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms.

TUE
S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.

TUE 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.

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AMZ362-212300
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM
539 AM EDT Fri Aug 21 2026

TODAY
SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to 20 kt late. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds.

TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers and tstms.

SAT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 8 seconds. A chance of showers. A slight chance of tstms in the morning, then a chance of tstms in the afternoon.

SAT NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers and tstms.

SUN
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers with a slight chance of tstms in the morning.

SUN NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms in the evening.

MON
SW winds 5 to 10 kt. Seas 2 to 3 ft.

MON NIGHT
S winds 10 kt. Seas 2 ft. A slight chance of showers and tstms.

TUE
S winds 5 to 10 kt. Seas 2 ft. A chance of showers and tstms.

TUE NIGHT
SW winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ364-212300
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary
539 AM EDT Fri Aug 21 2026

TODAY
SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts to 20 kt this afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds.

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 1 foot at 8 seconds. A chance of showers and tstms.

SAT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.

SAT NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms.

SUN
W winds 10 to 15 kt, becoming S in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers in the morning.

SUN NIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 2 ft at 4 seconds and E 1 foot at 8 seconds.

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

MON NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft.

TUE
S winds 10 to 15 kt. Seas 2 ft. A chance of showers and tstms.

TUE NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ380-212300
Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM
539 AM EDT Fri Aug 21 2026

TODAY
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.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and E 2 ft at 8 seconds. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.

SAT
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 1 foot at 9 seconds. A chance of tstms. Showers likely, mainly in the morning.

SAT NIGHT
SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at 9 seconds. Showers with a chance of tstms.

SUN
SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and E 1 foot at 9 seconds. A chance of showers. A chance of tstms, mainly in the morning.

SUN NIGHT
SW winds 10 to 15 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms.

MON
SW winds 10 kt. Seas 2 to 3 ft.

MON NIGHT
S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.

TUE
SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.

TUE NIGHT
SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ382-212300
Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM
539 AM EDT Fri Aug 21 2026

TODAY
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.

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 1 foot at 9 seconds. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.

SAT
SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers. A chance of tstms, mainly in the morning.

SAT NIGHT
SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. Showers likely with a chance of tstms.

SUN
SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. Showers likely with a chance of tstms in the morning, then a slight chance of showers and tstms in the afternoon.

SUN NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A slight chance of showers and tstms in the evening.

MON
SW winds 5 to 10 kt. Seas 2 to 3 ft.

MON NIGHT
S winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms.

TUE
SW winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.

TUE NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ384-212300
Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM
539 AM EDT Fri Aug 21 2026

TODAY
SW winds 5 to 10 kt, becoming S 10 to 15 kt late. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and SE 2 ft at 8 seconds.

TONIGHT
S winds 10 to 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms.

SAT
SW winds 10 to 15 kt. Seas 2 to 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 morning, then a chance of showers and tstms in the afternoon.

SAT NIGHT
SW winds 15 kt with gusts to 20 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds. Showers likely with a chance of tstms.

SUN
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A slight chance of tstms. A chance of showers, mainly in the morning.

SUN NIGHT
SW winds 10 to 15 kt with gusts to 20 kt. Seas 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds.

MON
SW winds 5 to 10 kt. Seas 2 to 3 ft.

MON NIGHT
S winds 10 kt. Seas 2 to 3 ft.

TUE
SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.

TUE NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.