972
FZUS52 KCHS 220200
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1000 PM EDT Wed May 21 2025

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

AMZ300-221500-
1000 PM EDT Wed May 21 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A cold front will push offshore this evening and be followed by
high pressure through the weekend. A warm front will lift north
through the area Sunday and Monday.

$$

AMZ330-221500-
Charleston Harbor-
1000 PM EDT Wed May 21 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THURSDAY...

.TONIGHT...W winds 10 to 15 kt. Gusts to 25 kt, increasing to
30 kt after midnight.
.THU...NW winds 5 to 10 kt, becoming W 10 to 15 kt in the
afternoon.
.THU NIGHT...W winds 10 to 15 kt.
.FRI...NW winds 5 to 10 kt, becoming W in the afternoon.
.FRI NIGHT...W winds 5 to 10 kt, becoming N after midnight.
.SAT...N winds 5 to 10 kt, becoming E in the afternoon.
.SAT NIGHT...SE winds 5 kt.
.SUN...S winds 5 to 10 kt.
.SUN NIGHT...S winds 10 kt. A slight chance of showers and tstms.
.MON...S winds 10 to 15 kt. A chance of showers and tstms.
.MON NIGHT...S winds 10 to 15 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 79 degrees.

$$

AMZ350-221500-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1000 PM EDT Wed May 21 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THURSDAY...

.TONIGHT...W winds 15 to 20 kt, becoming NW after midnight. Gusts
to 30 kt. Seas 4 to 5 ft, subsiding to 3 to 4 ft after midnight.
Wave Detail: SW 5 ft at 6 seconds and SE 2 ft at 9 seconds,
becoming SW 3 ft at 6 seconds and SE 1 foot at 9 seconds.
.THU...NW winds 10 to 15 kt, becoming SW 15 to 20 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: W 3 ft at 5 seconds and
SE 1 foot at 9 seconds.
.THU NIGHT...SW winds 15 to 20 kt, becoming W 10 to 15 kt after
midnight. Seas 3 to 4 ft, subsiding to 2 to 3 ft after midnight.
Wave Detail: SW 3 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI...NW winds 10 kt, becoming W in the afternoon. Seas 2 ft.
Wave Detail: SW 2 ft at 5 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...W winds 10 to 15 kt, becoming N after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 4 seconds and E 2 ft at 9 seconds.
.SAT...N winds 10 to 15 kt, becoming E 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: NE 2 ft at 6 seconds and
SW 1 foot at 4 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...S winds 15 kt. Seas 2 ft. A chance of showers and tstms.
.MON NIGHT...S winds 15 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-221500-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1000 PM EDT Wed May 21 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT THURSDAY...

.TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts
to 25 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 9 seconds,
becoming NW 3 ft at 5 seconds and SE 1 foot at 9 seconds.
.THU...NW winds 10 to 15 kt, becoming SW in the afternoon. Gusts
to 25 kt. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 4 seconds and
SE 1 foot at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail:
SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI...NW winds 10 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...W winds 10 kt, becoming N after midnight. Seas 2 ft.
Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.SAT...NE winds 10 to 15 kt, becoming E 5 to 10 kt in the
afternoon. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and
NE 2 ft at 9 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...S winds 10 to 15 kt. Seas 2 ft. A chance of showers and
tstms.
.MON 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.

$$

AMZ354-221500-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1000 PM EDT Wed May 21 2025

.TONIGHT...W winds 10 to 15 kt, becoming NW after midnight. Gusts
to 25 kt. Seas 2 to 3 ft. Wave Detail: W 3 ft at 4 seconds and SE
1 foot at 9 seconds.
.THU...NW winds 10 to 15 kt with gusts to 25 kt, becoming SW in
the afternoon. Seas 2 to 3 ft. Wave Detail: NW 2 ft at 3 seconds
and SE 1 foot at 9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: S 2 ft
at 3 seconds and SE 1 foot at 8 seconds.
.FRI...W winds 10 kt, becoming SW in the afternoon. Seas 2 ft.
Wave Detail: SW 2 ft at 4 seconds and SE 1 foot at 9 seconds.
.FRI NIGHT...SW winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 1 foot at
9 seconds.
.SAT...N winds 10 kt, becoming NE in the afternoon. Seas 2 to
3 ft. Wave Detail: W 2 ft at 4 seconds and NE 2 ft at 9 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...S winds 10 to 15 kt. Seas 2 ft.
.SUN NIGHT...S winds 15 kt. Seas 2 ft. A slight chance of showers
and tstms.
.MON...S winds 10 to 15 kt. Seas 2 ft. A chance of showers and
tstms.
.MON 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.

$$

AMZ374-221500-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1000 PM EDT Wed May 21 2025

.TONIGHT...W winds 15 to 20 kt, becoming NW after midnight. Seas
3 to 4 ft. Wave Detail: SW 4 ft at 5 seconds and SE 2 ft at
9 seconds.
.THU...NW winds 10 to 15 kt with gusts to 25 kt, becoming W in
the afternoon. Seas 3 to 4 ft, subsiding to 2 to 3 ft in the
afternoon. Wave Detail: NW 3 ft at 4 seconds and SE 2 ft at
9 seconds, becoming NW 2 ft at 4 seconds and SE 2 ft at
9 seconds.
.THU NIGHT...SW winds 10 to 15 kt. Seas 2 ft. Wave Detail: SW
2 ft at 4 seconds and SE 2 ft at 9 seconds.
.FRI...W winds 10 to 15 kt, diminishing to 5 to 10 kt in the
afternoon. Seas 2 ft. Wave Detail: SW 2 ft at 4 seconds and SE
2 ft at 9 seconds.
.FRI NIGHT...SW winds 10 kt, becoming NW after midnight. Seas
2 ft. Wave Detail: SW 2 ft at 3 seconds and SE 2 ft at 9 seconds.
.SAT...NE winds 5 to 10 kt. Seas 2 ft, building to 3 ft in the
afternoon. Wave Detail: NW 2 ft at 3 seconds and E 2 ft at
9 seconds, becoming SW 2 ft at 4 seconds and E 2 ft at 9 seconds.
.SAT NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SUN...S winds 10 kt. Seas 2 ft.
.SUN NIGHT...S winds 10 to 15 kt. Seas 2 ft. A slight chance of
showers and tstms.
.MON...S winds 10 to 15 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.MON NIGHT...S winds 15 kt. Seas 2 to 3 ft. A chance of showers
and tstms.

Winds and seas higher in and near tstms.

$$