National Weather Service Marine Forecast FZUS52 KCHS

FZUS52 KCHS 310624
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
224 AM EDT Fri Jul 31 2026

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

AMZ300-312000
224 AM EDT Fri Jul 31 2026

.Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... A stationary front will linger across southeast South Carolina and southeast Georgia through tonight, followed by unsettled weather through early next week.

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AMZ340-312000
Charleston Harbor
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
Light and variable winds, becoming S 5 kt late.

FRI
E winds 5 kt, becoming SE in the afternoon.

FRI NIGHT
S winds 5 to 10 kt.

SAT
SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. A chance of showers with a slight chance of tstms.

SAT NIGHT
S winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. A chance of tstms. A chance of showers in the evening, then showers likely after midnight.

SUN
SW winds 10 to 15 kt, becoming S 15 to 20 kt in the afternoon. Waves 1 to 2 ft. Showers with a chance of tstms.

SUN NIGHT
SW winds 10 to 15 kt with gusts to 25 kt. Showers. Tstms likely, mainly in the evening.

MON
SW winds 10 to 15 kt. Showers with tstms likely.

MON NIGHT
SW winds 10 to 15 kt. Showers likely with a 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.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 86 degrees.

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AMZ360-312000
Coastal waters from South Santee River to Edisto Beach SC out 20 NM
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
SW winds 5 kt. Seas 2 ft. Wave Detail: S 1 foot at 4 seconds and SE 1 foot at 7 seconds.

FRI
E winds 5 kt, becoming SE in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 7 seconds.

FRI NIGHT
S winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 8 seconds.

SAT
SE winds 5 to 10 kt, increasing to 10 to 15 kt with gusts to 20 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of showers. A slight chance of tstms in the afternoon.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 4 seconds and SE 1 foot at 9 seconds. A chance of tstms. A chance of showers in the evening, then showers after midnight.

SUN
S winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 6 ft in the afternoon. Wave Detail: S 4 ft at 5 seconds and SE 1 foot at 9 seconds, becoming S 6 ft at 6 seconds. Showers with a chance of tstms.

SUN NIGHT
SW winds 20 kt with gusts to 25 kt. Seas 5 to 6 ft. Showers with tstms likely in the evening, then showers with a chance of tstms after midnight.

MON
SW winds 15 to 20 kt. Seas 4 to 6 ft. Showers with tstms likely.

MON NIGHT
SW winds 15 to 20 kt. Seas 4 to 5 ft. Showers with a chance of tstms.

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

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

Winds and seas higher in and near tstms.

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AMZ362-312000
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
S winds 5 kt. Seas 2 ft. Wave Detail: S 1 foot at 4 seconds and SE 1 foot at 8 seconds.

FRI
SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 6 seconds.

FRI NIGHT
S winds 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 8 seconds.

SAT
S winds 5 to 10 kt, becoming SE 10 to 15 kt with gusts to 20 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of tstms. A slight chance of showers.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: S 3 ft at 5 seconds and SE 1 foot at 8 seconds. Showers with a chance of tstms.

SUN
SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 5 ft in the afternoon. Wave Detail: S 3 ft at 5 seconds and SE 2 ft at 9 seconds, becoming S 5 ft at 5 seconds and SE 2 ft at 8 seconds. Showers with a chance of tstms.

SUN NIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight. Showers. Tstms likely, mainly in the evening.

MON
SW winds 15 to 20 kt. Seas 4 to 5 ft. Showers with tstms likely.

MON NIGHT
SW winds 15 to 20 kt. Seas 3 to 4 ft. Showers likely with a chance of tstms.

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

TUE NIGHT
S winds 5 to 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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AMZ364-312000
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
SW winds 5 kt. Seas 2 ft. Wave Detail: S 1 foot at 5 seconds and SE 1 foot at 8 seconds.

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

FRI NIGHT
S winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at 5 seconds and SE 1 foot at 8 seconds.

SAT
S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms in the afternoon.

SAT NIGHT
S 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. Showers with a chance of tstms.

SUN
SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 4 ft at 5 seconds and SE 1 foot at 9 seconds. Showers likely with a slight chance of tstms in the morning, then showers with a chance of tstms in the afternoon.

SUN NIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. A chance of tstms. Showers.

MON
SW winds 15 to 20 kt. Seas 3 to 4 ft. Showers with tstms likely.

MON NIGHT
SW winds 15 to 20 kt. Seas 3 to 4 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
S winds 5 to 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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AMZ380-312000
Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
SW winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at 7 seconds and NE 1 foot at 4 seconds.

FRI
NE winds 5 kt, becoming SE in the afternoon. Seas 2 to 3 ft. Wave Detail: S 2 ft at 7 seconds and NE 1 foot at 4 seconds.

FRI NIGHT
S winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 8 seconds.

SAT
SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 7 seconds.

SAT NIGHT
S winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: S 3 ft at 4 seconds and SE 2 ft at 9 seconds, becoming S 4 ft at 5 seconds and E 1 foot at 9 seconds. A chance of tstms. A chance of showers in the evening, then showers after midnight.

SUN
S winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 5 to 6 ft in the afternoon. Wave Detail: S 4 ft at 5 seconds and SE 3 ft at 8 seconds, becoming S 5 ft at 7 seconds. Showers with a chance of tstms.

SUN NIGHT
SW winds 20 kt with gusts to 25 kt. Seas 6 to 7 ft. Tstms likely. Showers.

MON
SW winds 15 to 20 kt. Seas 5 to 6 ft. Showers with a chance of tstms.

MON NIGHT
SW winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely with a chance of tstms.

TUE
SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.

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

Winds and seas higher in and near tstms.

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AMZ382-312000
Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
SW winds 5 kt. Seas 2 ft. Wave Detail: NE 1 foot at 3 seconds and S 1 foot at 5 seconds.

FRI
SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 8 seconds.

FRI NIGHT
SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 2 ft at 8 seconds.

SAT
SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 7 seconds. A slight chance of tstms. A slight chance of showers.

SAT NIGHT
S winds 15 to 20 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 8 seconds, becoming S 4 ft at 5 seconds and E 1 foot at 9 seconds. A chance of tstms. A chance of showers in the evening, then showers after midnight.

SUN
SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, building to 4 to 6 ft in the afternoon. Wave Detail: S 4 ft at 5 seconds and SE 2 ft at 9 seconds, becoming S 5 ft at 6 seconds. Showers with a chance of tstms.

SUN NIGHT
SW winds 20 to 25 kt. Seas 5 to 6 ft. Showers with tstms likely.

MON
SW winds 15 to 20 kt. Seas 4 to 6 ft. Showers likely with a chance of tstms.

MON NIGHT
SW winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely with a chance of tstms.

TUE
SW winds 10 to 15 kt. Seas 3 to 4 ft. A chance of showers and tstms.

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

Winds and seas higher in and near tstms.

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AMZ384-312000
Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM
224 AM EDT Fri Jul 31 2026

REST OF TONIGHT
SW winds 5 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and N 1 foot at 3 seconds.

FRI
SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 5 seconds and SE 1 foot at 8 seconds.

FRI NIGHT
S winds 5 to 10 kt. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 1 foot at 9 seconds.

SAT
S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 2 ft. Wave Detail: S 2 ft at 4 seconds and SE 2 ft at 8 seconds. A slight chance of showers and tstms.

SAT NIGHT
S winds 15 kt with gusts to 20 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: S 3 ft at 4 seconds and SE 1 foot at 9 seconds, becoming S 3 ft at 5 seconds and SE 1 foot at 9 seconds. A chance of tstms. Showers.

SUN
SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, building to 4 to 5 ft in the afternoon. Wave Detail: SW 3 ft at 5 seconds and SE 2 ft at 9 seconds, becoming S 4 ft at 5 seconds and SE 2 ft at 8 seconds. Showers. A chance of tstms, mainly in the morning.

SUN NIGHT
S winds 20 to 25 kt, becoming SW 15 to 20 kt after midnight. Seas 4 to 6 ft, subsiding to 4 to 5 ft after midnight. Showers likely with a chance of tstms.

MON
SW winds 15 to 20 kt. Seas 4 to 5 ft. Showers likely with a chance of tstms.

MON NIGHT
SW winds 10 to 15 kt. Seas 3 to 4 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
S winds 10 kt. Seas 2 to 3 ft. A chance of showers and tstms.

Winds and seas higher in and near tstms.