National Weather Service Marine Forecast FZUS52 KCHS

FZUS52 KCHS 212326
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
725 PM 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

AMZ300-221300
725 PM 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.

---

AMZ340-221300
Charleston Harbor
725 PM EDT Fri Aug 21 2026

TONIGHT
S winds 10 to 15 kt, becoming SW 5 to 10 kt late. A chance of showers this evening. A chance of tstms. Showers likely after midnight.

SAT
SW winds 5 to 10 kt. A chance of tstms. Showers likely, mainly in the morning.

SAT NIGHT
SW winds 5 to 10 kt. A chance of showers and tstms.

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

SUN NIGHT
SW winds 10 kt, diminishing to 5 kt after midnight. A slight chance of showers and tstms in the evening.

MON
SW winds 5 to 10 kt.

MON NIGHT
SW winds 5 to 10 kt. A chance of showers with a slight chance of tstms.

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

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

WED
SW 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.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 88 degrees.

---

AMZ360-221300
Coastal waters from South Santee River to Edisto Beach SC out 20 NM
725 PM EDT Fri Aug 21 2026

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 late this evening. Showers likely with a chance of tstms late.

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

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 slight chance of showers and tstms.

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. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds.

MON NIGHT
S winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Seas 2 to 3 ft. A chance of showers with a slight chance of tstms.

TUE
SW winds 5 to 10 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.

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

WED NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms.

Winds and seas higher in and near tstms.

---

AMZ362-221300
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM
725 PM EDT Fri Aug 21 2026

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 slight chance of showers and tstms late this evening. A chance of showers and tstms after midnight.

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 and tstms.

SAT NIGHT
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 E 1 foot at 9 seconds. A chance of showers and tstms, mainly in the evening.

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

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

MON
SW winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and E 1 foot at 8 seconds.

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

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

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

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

WED 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.

---

AMZ364-221300
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary
725 PM EDT Fri Aug 21 2026

TONIGHT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this evening, then a chance of showers and tstms late this evening.

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

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

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

MON
SW winds 5 to 10 kt, becoming S in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds.

MON NIGHT
S winds 10 to 15 kt, becoming SW 5 to 10 kt after midnight. Seas 2 ft. A slight chance of showers and tstms.

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

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

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

WED 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.

---

AMZ380-221300
Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM
725 PM EDT Fri Aug 21 2026

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

SAT
SW winds 10 to 15 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 3 ft at 5 seconds and E 1 foot at 9 seconds. A chance of tstms. A chance of showers in the evening, then showers likely after midnight.

SUN
SW winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 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. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 1 foot at 8 seconds. A slight chance of showers and tstms.

MON
SW winds 10 kt. Seas 3 ft. Wave Detail: SW 2 ft at 5 seconds and E 2 ft at 12 seconds.

MON NIGHT
SW winds 10 kt. Seas 2 to 3 ft. A slight chance of showers and tstms in the evening, then a chance of showers and tstms after midnight.

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

TUE NIGHT
S winds 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms.

WED
SW winds 10 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms.

WED NIGHT
S winds 10 to 15 kt. Seas 2 to 3 ft. Showers likely with a chance of tstms.

Winds and seas higher in and near tstms.

---

AMZ382-221300
Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM
725 PM EDT Fri Aug 21 2026

TONIGHT
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. 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 and 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 4 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms.

SUN
SW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of showers and tstms in the morning.

SUN 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. A slight chance of tstms in the evening, then a chance of tstms after midnight.

MON
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.

MON NIGHT
SW winds 10 to 15 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.

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

WED 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.

---

AMZ384-221300
Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM
725 PM EDT Fri Aug 21 2026

TONIGHT
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 8 seconds. A slight chance of showers and tstms late this evening. A chance of showers and tstms after midnight.

SAT
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 8 seconds. A chance of showers and tstms, mainly in the morning.

SAT 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 9 seconds. A chance of showers and tstms.

SUN
SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds.

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

MON
SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 2 ft at 8 seconds.

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

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

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

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

WED 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.