National Weather Service Marine Forecast FZUS52 KCHS

FZUS52 KCHS 172139
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
539 PM EDT Wed Jun 17 2026

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

AMZ300-181100
539 PM EDT Wed Jun 17 2026

.Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... A front will remain stalled near the local waters nearby yielding scattered showers and thunderstorms through tonight, before weak high pressure rebuilds into the region on Thursday. A cold front may move pass through on early Saturday morning.

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AMZ340-181100
Charleston Harbor
539 PM EDT Wed Jun 17 2026

TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt. A chance of showers and tstms early this evening.

THU
SW winds 10 to 15 kt with gusts to 20 kt. A chance of showers and tstms in the afternoon.

THU NIGHT
SW winds 10 to 15 kt, increasing to 15 to 20 kt after midnight. Waves 1 to 2 ft. A chance of tstms. A chance of showers in the evening, then showers after midnight.

FRI
SW winds 15 to 20 kt with gusts to 30 kt. Waves 1 to 2 ft. Showers likely with a chance of tstms.

FRI NIGHT
SW winds 10 to 15 kt with gusts to 20 kt, becoming W 5 to 10 kt after midnight. A chance of showers and tstms.

SAT
NW winds 5 kt, becoming E in the afternoon. A slight chance of showers and tstms.

SAT NIGHT
S winds 5 kt. A slight chance of showers and tstms in the evening.

SUN
SW winds 5 to 10 kt.

SUN NIGHT
SW winds 10 kt.

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

MON NIGHT
SW winds 10 to 15 kt. A slight 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 83 degrees.

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AMZ360-181100
Coastal waters from South Santee River to Edisto Beach SC out 20 NM
539 PM EDT Wed Jun 17 2026

SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY AFTERNOON THROUGH FRIDAY EVENING

TONIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: S 5 ft at 7 seconds. A chance of showers and tstms early this evening.

THU
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.

THU NIGHT
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 4 to 6 ft. Wave Detail: S 5 ft at 6 seconds. A chance of tstms. A chance of showers in the evening, then showers likely after midnight.

FRI
SW winds 25 to 30 kt, diminishing to 20 to 25 kt in the afternoon. Seas 5 to 7 ft. Wave Detail: S 7 ft at 7 seconds. Showers likely with a chance of tstms.

FRI NIGHT
SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: S 6 ft at 7 seconds, becoming S 4 ft at 7 seconds. A chance of showers and tstms.

SAT
NW winds 10 kt, becoming NE in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and SE 2 ft at 7 seconds. A slight chance of tstms. A chance of showers, mainly in the morning.

SAT NIGHT
SW winds 5 to 10 kt. Seas 2 ft. A slight chance of showers and tstms in the evening.

SUN
SW winds 10 to 15 kt. Seas 2 ft.

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

MON
SW winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers and tstms.

MON NIGHT
SW winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ362-181100
Coastal waters from Edisto Beach SC to Savannah GA out 20 NM
539 PM EDT Wed Jun 17 2026

SMALL CRAFT ADVISORY IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY EVENING

TONIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: S 4 ft at 6 seconds, becoming SW 3 ft at 5 seconds and SE 1 foot at 8 seconds. A slight chance of showers and tstms early this evening.

THU
SW winds 15 kt with gusts to 25 kt. Seas 2 to 3 ft. Wave Detail: SW 3 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of showers and tstms in the afternoon.

THU NIGHT
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 4 ft, building to 4 to 5 ft after midnight. Wave Detail: S 3 ft at 6 seconds, becoming S 5 ft at 5 seconds. A chance of showers. A chance of tstms, mainly in the evening.

FRI
SW winds 20 to 25 kt with gusts to 35 kt. Seas 4 to 6 ft. Wave Detail: S 6 ft at 6 seconds. Showers likely. A slight chance of tstms in the morning, then a chance of tstms in the afternoon.

FRI NIGHT
SW winds 15 to 20 kt, becoming W 10 to 15 kt after midnight. Seas 4 to 5 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: SW 4 ft at 6 seconds and SE 1 foot at 7 seconds, becoming W 3 ft at 5 seconds and SE 1 foot at 7 seconds. A chance of tstms. Showers likely, mainly in the evening.

SAT
NW winds 5 to 10 kt, becoming NE in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 5 seconds and SE 1 foot at 7 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 5 to 10 kt. Seas 2 ft. A chance of showers and tstms in the evening.

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

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

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

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

Winds and seas higher in and near tstms.

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AMZ364-181100
Coastal waters from Savannah GA to Altamaha Sound GA out 20 nm, including Grays Reef National Marine Sanctuary
539 PM EDT Wed Jun 17 2026

SMALL CRAFT ADVISORY IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY AFTERNOON

TONIGHT
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 8 seconds. A chance of showers and tstms early this evening.

THU
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. A chance of showers and tstms in the afternoon.

THU NIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: S 3 ft at 5 seconds. A chance of showers. A chance of tstms, mainly in the evening.

FRI
SW winds 20 to 25 kt, diminishing to 15 to 20 kt in the afternoon. Seas 4 to 5 ft. Wave Detail: SW 4 ft at 5 seconds. Showers likely with a slight chance of tstms in the morning, then showers with a chance of tstms in the afternoon.

FRI NIGHT
W winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: SW 3 ft at 5 seconds and SE 1 foot at 7 seconds, becoming W 2 ft at 4 seconds and SE 1 foot at 7 seconds. A chance of tstms. Showers, mainly in the evening.

SAT
W winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 ft. Wave Detail: W 2 ft at 4 seconds and SE 1 foot at 7 seconds. A slight chance of showers and tstms in the morning, then a chance of showers and tstms in the afternoon.

SAT NIGHT
S winds 5 to 10 kt, becoming SW after midnight. Seas 2 ft. A chance of showers and tstms in the evening.

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

SUN NIGHT
S winds 10 to 15 kt. Seas 2 ft.

MON
SW winds 10 to 15 kt. Seas 2 ft.

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

Winds and seas higher in and near tstms.

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AMZ380-181100
Waters from South Santee River SC to Edisto Beach SC extending from 20 to 60 NM
539 PM EDT Wed Jun 17 2026

TONIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 6 ft, subsiding to 4 to 5 ft after midnight. Wave Detail: SW 6 ft at 6 seconds and SE 2 ft at 7 seconds, becoming S 5 ft at 7 seconds. A slight chance of showers and tstms early this evening.

THU
SW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: S 4 ft at 6 seconds.

THU NIGHT
SW winds 20 to 25 kt with gusts to 30 kt. Seas 4 to 5 ft, building to 5 to 6 ft after midnight. Wave Detail: S 4 ft at 6 seconds, becoming S 5 ft at 7 seconds. A chance of showers and tstms.

FRI
SW winds 25 to 30 kt. Seas 6 to 8 ft, building to 7 to 9 ft in the afternoon. Wave Detail: S 8 ft at 7 seconds, becoming SW 8 ft at 7 seconds. A chance of tstms. Showers, mainly in the morning.

FRI NIGHT
SW winds 20 to 25 kt, becoming W 15 kt after midnight. Seas 6 to 8 ft, subsiding to 4 to 5 ft after midnight. Wave Detail: S 7 ft at 7 seconds, becoming S 5 ft at 7 seconds. A chance of showers and tstms.

SAT
NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: W 3 ft at 6 seconds and SE 2 ft at 7 seconds, becoming W 2 ft at 5 seconds and SE 2 ft at 7 seconds. A chance of showers and tstms, mainly in the morning.

SAT NIGHT
S winds 5 kt, becoming SW after midnight. Seas 2 to 3 ft. A slight chance of tstms in the evening. A slight chance of showers.

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

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

MON
SW winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers and tstms.

MON NIGHT
SW winds 15 to 20 kt. Seas 4 to 5 ft. A slight chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ382-181100
Waters from Edisto Beach SC to Savannah GA extending from 20 to 60 NM
539 PM EDT Wed Jun 17 2026

TONIGHT
SW winds 20 to 25 kt, diminishing to 15 to 20 kt late this evening. Seas 4 to 6 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: SW 5 ft at 5 seconds and SE 2 ft at 8 seconds, becoming SW 4 ft at 5 seconds and SE 2 ft at 8 seconds. A chance of showers and tstms early this evening.

THU
SW winds 15 to 20 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 3 ft at 7 seconds. A slight chance of showers and tstms in the afternoon.

THU NIGHT
SW winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 3 to 4 ft, building to 4 to 5 ft after midnight. Wave Detail: S 3 ft at 6 seconds, becoming S 4 ft at 6 seconds. A chance of showers. A chance of tstms, mainly in the evening.

FRI
SW winds 20 to 25 kt with gusts to 35 kt. Seas 5 to 7 ft, building to 6 to 7 ft in the afternoon. Wave Detail: S 7 ft at 7 seconds. Showers likely with a chance of tstms.

FRI NIGHT
W winds 15 to 20 kt with gusts to 25 kt. Seas 5 to 7 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: S 6 ft at 7 seconds, becoming S 4 ft at 6 seconds. A chance of showers and tstms.

SAT
NW winds 10 to 15 kt with gusts to 20 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and SE 2 ft at 7 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 5 kt. Seas 2 ft. A chance of showers and tstms, mainly in the evening.

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

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

MON
SW winds 15 to 20 kt. Seas 3 to 4 ft.

MON NIGHT
SW winds 15 to 20 kt. Seas 3 to 4 ft. A slight chance of showers and tstms.

Winds and seas higher in and near tstms.

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AMZ384-181100
Waters from Savannah GA to Altamaha Sound GA extending from 20 to 60 NM
539 PM EDT Wed Jun 17 2026

SMALL CRAFT ADVISORY IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY EVENING

TONIGHT
SW winds 10 to 15 kt with gusts to 20 kt. 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 2 ft at 4 seconds and SE 2 ft at 8 seconds. A chance of showers and tstms early this evening.

THU
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 2 ft at 8 seconds. A chance of showers and tstms in the afternoon.

THU NIGHT
SW winds 15 to 20 kt with gusts to 25 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and SE 3 ft at 7 seconds. A chance of showers and tstms, mainly in the evening.

FRI
SW winds 20 to 25 kt with gusts to 30 kt. Seas 4 to 6 ft. Wave Detail: S 5 ft at 6 seconds. Showers likely. A slight chance of tstms in the morning, then a chance of tstms in the afternoon.

FRI NIGHT
W winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at 7 seconds, becoming SW 3 ft at 5 seconds and SE 2 ft at 7 seconds. A chance of tstms. Showers likely, mainly in the evening.

SAT
W winds 10 to 15 kt, becoming NW 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 7 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 5 kt. Seas 2 ft. A chance of showers and tstms in the evening.

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

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

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

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

Winds and seas higher in and near tstms.