669
FZUS52 KCHS 221645
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
1245 PM EDT Tue Apr 22 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

AMZ300-230515-
1245 PM EDT Tue Apr 22 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A front will slowly approach the region today then become
stationary over or near the area Wednesday into late week.
Another cold front could reach the area this weekend.

$$

AMZ330-230515-
Charleston Harbor-
1245 PM EDT Tue Apr 22 2025

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt late.
.TONIGHT...S winds 5 to 10 kt.
.WED...S winds 5 to 10 kt. A slight chance of showers and tstms
in the morning, then a chance of showers and tstms in the
afternoon.
.WED NIGHT...SE winds 5 kt. A chance of showers. A chance of
tstms, mainly in the evening.
.THU...E winds 5 to 10 kt. A chance of showers. A slight chance
of tstms in the morning, then a chance of tstms in the afternoon.
.THU NIGHT...E winds 5 kt. A chance of showers and tstms in the
evening.
.FRI...SE winds 5 to 10 kt. A slight chance of showers and tstms.
.FRI NIGHT...SE winds 5 kt.
.SAT...S winds 5 to 10 kt. A chance of showers with a slight
chance of tstms.
.SAT NIGHT...SW winds 5 to 10 kt. A chance of showers.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 72 degrees.

$$

AMZ350-230515-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1245 PM EDT Tue Apr 22 2025

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt late. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.TONIGHT...S winds 10 to 15 kt, becoming SW 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.WED...S winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft at
8 seconds. A slight chance of showers and tstms in the morning,
then a chance of showers and tstms in the afternoon.
.WED NIGHT...SE winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A chance of showers. A chance of tstms, mainly in the
evening.
.THU...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds and S 1 foot at 4 seconds. A chance of showers with a
slight chance of tstms.
.THU NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 9 seconds and S 1 foot at 4 seconds. A slight chance of
tstms in the evening. A slight chance of showers.
.FRI...E winds 5 kt. Seas 2 to 3 ft. A slight chance of showers
and tstms.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.
.SAT NIGHT...SW winds 10 kt. Seas 2 to 3 ft. A chance of showers.


Winds and seas higher in and near tstms.

$$

AMZ352-230515-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1245 PM EDT Tue Apr 22 2025

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt late. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.TONIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.WED...S winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft at
8 seconds. A slight chance of showers and tstms in the afternoon.
.WED NIGHT...SE winds 5 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 9 seconds. A slight chance of showers and tstms.
.THU...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
8 seconds. A chance of showers with a slight chance of tstms.
.THU NIGHT...E winds 5 kt. Seas 2 ft. Wave Detail: SE 2 ft at
9 seconds. A slight chance of showers and tstms in the evening.
.FRI...E winds 5 kt. Seas 2 to 3 ft. A slight chance of showers
and tstms.
.FRI NIGHT...SE winds 5 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
with a slight chance of tstms.
.SAT NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers.

Winds and seas higher in and near tstms.

$$

AMZ354-230515-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
1245 PM EDT Tue Apr 22 2025

.TODAY...S winds 5 to 10 kt, increasing to 10 to 15 kt late. Seas
2 to 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.TONIGHT...S winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SE
3 ft at 8 seconds.
.WED...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 2 ft
at 8 seconds and S 1 foot at 4 seconds. A slight chance of
showers and tstms in the afternoon.
.WED NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 9 seconds and SE 1 foot at 4 seconds. A slight chance of
showers and tstms.
.THU...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
8 seconds. A slight chance of showers and tstms.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft
at 8 seconds. A slight chance of showers and tstms in the
evening.
.FRI...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft.
.SAT...S winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.SAT NIGHT...S winds 10 kt. Seas 2 to 3 ft. A chance of showers.

Winds and seas higher in and near tstms.

$$

AMZ374-230515-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
1245 PM EDT Tue Apr 22 2025

.TODAY...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE 3 ft
at 8 seconds and E 1 foot at 7 seconds.
.TONIGHT...S winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 3 ft. Wave Detail: SE 3 ft at 8 seconds.
.WED...S winds 5 kt. Seas 3 ft. Wave Detail: E 3 ft at 8 seconds
and S 1 foot at 4 seconds.
.WED NIGHT...SE winds 5 to 10 kt. Seas 3 ft. Wave Detail: SE 3 ft
at 9 seconds. A slight chance of tstms in the evening. A slight
chance of showers.
.THU...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 8 seconds. A slight chance of showers in the morning.
.THU NIGHT...SE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 8 seconds.
.FRI...SE winds 5 to 10 kt. Seas 3 ft.
.FRI NIGHT...SE winds 5 to 10 kt. Seas 3 to 4 ft.
.SAT...S winds 5 to 10 kt. Seas 3 ft. A slight chance of showers
and tstms.
.SAT NIGHT...S winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers.

Winds and seas higher in and near tstms.

$$