Station List

National Weather Service Marine Forecast FZUS52 KCHS

FZUS52 KCHS 180940
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
440 AM EST Sun Jan 18 2026

South Santee River SC to Savannah GA out 20 NM and Savannah GA to Altamaha Sound GA out 60 NM, including Charleston Harbor and Grays Reef National Marine Sanctuary

AMZ300-182300
440 AM EST Sun Jan 18 2026

.Synopsis for the coastal waters of south coastal South Carolina and north coastal Georgia... A cold front will push through this morning as low pressure develops off the Southeast U.S. coast. High pressure will then return next week.

AMZ330-182300
Charleston Harbor
440 AM EST Sun Jan 18 2026

TODAY
N winds 10 kt, becoming NW this afternoon. Showers until late afternoon, then a chance of showers late. Vsby 1 to 3 NM late this morning.

TONIGHT
W winds 10 kt.

MON
W winds 10 kt.

MON NIGHT
NW winds 5 to 10 kt.

TUE
N winds 5 kt.

TUE NIGHT
NE winds 5 kt.

WED
NE winds 5 to 10 kt.

WED NIGHT
N winds 5 kt.

THU
NW winds 5 kt. A slight chance of showers.

THU NIGHT
N winds 5 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 54 degrees.

AMZ350-182300
Waters from South Santee River to Edisto Beach SC out 20 NM
440 AM EST Sun Jan 18 2026

TODAY
N winds 10 to 15 kt, becoming NW this afternoon. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at 9 seconds. Showers until late afternoon, then a chance of showers late. Vsby 1 to 3 NM early this afternoon.

TONIGHT
NW winds 10 to 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE 2 ft at 8 seconds.

MON
W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 8 seconds.

MON NIGHT
NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 4 seconds and SE 2 ft at 8 seconds.

TUE
N winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 8 seconds.

TUE NIGHT
NE winds 10 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and W 1 foot at 3 seconds.

WED
NE winds 5 to 10 kt. Seas 3 to 4 ft.

WED NIGHT
N winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers.

THU
NW winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers.

THU NIGHT
N winds 10 to 15 kt. Seas 3 to 4 ft.

AMZ352-182300
Waters from Edisto Beach SC to Savannah GA out 20 NM
440 AM EST Sun Jan 18 2026

TODAY
N winds 10 to 15 kt, becoming NW 15 to 20 kt late this morning and early afternoon, then becoming 15 kt late. Seas 2 to 3 ft. Wave Detail: N 3 ft at 3 seconds and E 2 ft at 8 seconds. Showers until late afternoon, then a chance of showers late. Vsby 1 to 3 NM late this morning and early afternoon.

TONIGHT
NW winds 15 kt with gusts to 20 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and SE 1 foot at 8 seconds.

MON
W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 8 seconds.

MON NIGHT
NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: W 2 ft at 3 seconds and SE 2 ft at 8 seconds.

TUE
NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 8 seconds.

TUE NIGHT
NE winds 5 to 10 kt, increasing to 10 to 15 kt after midnight. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 7 seconds and W 1 foot at 3 seconds.

WED
NE winds 10 to 15 kt. Seas 3 ft.

WED NIGHT
NE winds 5 to 10 kt. Seas 3 ft. A slight chance of showers.

THU
NW winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers.

THU NIGHT
N winds 5 to 10 kt. Seas 3 to 4 ft. A slight chance of showers.

AMZ354-182300
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary
440 AM EST Sun Jan 18 2026

SMALL CRAFT ADVISORY IN EFFECT UNTIL 4 PM EST THIS AFTERNOON

TODAY
NW winds 15 to 20 kt. Seas 2 to 3 ft. Wave Detail: N 3 ft at 4 seconds and NE 2 ft at 9 seconds. Showers until late afternoon, then a chance of showers late. Vsby 1 to 3 NM late this morning and early afternoon.

TONIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 3 ft at 4 seconds and E 2 ft at 8 seconds.

MON
W winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and E 1 foot at 8 seconds.

MON NIGHT
NW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and SE 2 ft at 8 seconds.

TUE
N winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at 8 seconds.

TUE NIGHT
NE winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: NE 3 ft at 8 seconds and NW 2 ft at 3 seconds.

WED
NE winds 10 to 15 kt. Seas 3 ft.

WED NIGHT
NE winds 5 to 10 kt. Seas 3 ft.

THU
N winds 10 kt. Seas 3 to 4 ft. A chance of showers.

THU NIGHT
N winds 10 to 15 kt. Seas 3 to 4 ft. A slight chance of showers.

AMZ374-182300
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM
440 AM EST Sun Jan 18 2026

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT

TODAY
N winds 15 kt with gusts to 20 kt, becoming NW 20 to 25 kt with gusts to 30 kt late this morning. Seas 3 to 4 ft, building to 4 to 5 ft this afternoon. Wave Detail: NW 4 ft at 4 seconds and E 1 foot at 9 seconds, becoming NW 5 ft at 5 seconds and E 2 ft at 9 seconds. Showers until late afternoon, then a chance of showers late. Vsby 1 to 3 NM late this morning and early afternoon.

TONIGHT
NW winds 15 to 20 kt with gusts to 25 kt. Seas 4 to 5 ft. Wave Detail: NW 4 ft at 5 seconds and E 2 ft at 9 seconds.

MON
NW winds 10 to 15 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the afternoon. Wave Detail: NW 3 ft at 4 seconds and E 2 ft at 8 seconds, becoming NW 3 ft at 4 seconds and SE 2 ft at 8 seconds.

MON NIGHT
NW winds 10 to 15 kt. Seas 2 to 3 ft, building to 3 to 4 ft after midnight. Wave Detail: NW 2 ft at 4 seconds and SE 2 ft at 8 seconds, becoming NW 3 ft at 4 seconds and SE 2 ft at 8 seconds.

TUE
N winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 4 seconds and E 3 ft at 9 seconds.

TUE NIGHT
NE winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: NE 4 ft at 9 seconds and N 2 ft at 4 seconds.

WED
NE winds 10 to 15 kt. Seas 3 to 4 ft.

WED NIGHT
NE winds 10 kt. Seas 4 to 5 ft. A slight chance of showers.

THU
N winds 10 to 15 kt. Seas 4 to 5 ft. A chance of showers.

THU NIGHT
N winds 10 to 15 kt. Seas 4 to 5 ft. A slight chance of showers.