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Johns Island, SC Coastal Forecast

FZUS52 KCHS 262320
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
620 PM EST Fri Dec 26 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

AMZ300-271200-
620 PM EST Fri Dec 26 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
High pressure will prevail through this weekend. A cold front
will move through the area early next week.

$$

AMZ330-271200-
Charleston Harbor-
620 PM EST Fri Dec 26 2025

.TONIGHT...S winds 5 kt, becoming SW after midnight.
.SAT...NW winds 5 kt.
.SAT NIGHT...E winds 5 to 10 kt.
.SUN...E winds 5 kt.
.SUN NIGHT...S winds 5 to 10 kt.
.MON...SW winds 10 to 15 kt with gusts to 20 kt.
.MON NIGHT...NW winds 15 kt with gusts to 20 kt.
.TUE...NW winds 10 to 15 kt.
.TUE NIGHT...NW winds 5 kt.
.WED...W winds 5 to 10 kt.
.WED NIGHT...W winds 10 kt.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 56 degrees.

$$

AMZ350-271200-
Waters from South Santee River to Edisto Beach SC out 20 NM-
620 PM EST Fri Dec 26 2025

.TONIGHT...E winds 5 kt, becoming SW late this evening, then
becoming W 10 to 15 kt after midnight. Seas 2 to 3 ft, building
to 3 to 4 ft after midnight. Wave Detail: E 2 ft at 9 seconds and
SW 1 foot at 4 seconds, becoming E 3 ft at 10 seconds and SW 2 ft
at 4 seconds.
.SAT...W winds 5 to 10 kt. Seas 3 to 4 ft, subsiding to 2 to 3 ft
in the afternoon. Wave Detail: E 3 ft at 10 seconds and SW 2 ft
at 5 seconds, becoming SW 2 ft at 5 seconds and E 2 ft at
10 seconds.
.SAT NIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 5 seconds and E 2 ft at 10 seconds.
.SUN...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
9 seconds and S 1 foot at 4 seconds.
.SUN NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with
gusts to 20 kt after midnight. Seas 2 to 3 ft. Wave Detail: E
3 ft at 9 seconds and SW 2 ft at 4 seconds.
.MON...SW winds 15 to 20 kt, increasing to 20 to 25 kt in the
afternoon. Seas 4 to 5 ft, building to 4 to 6 ft in the
afternoon. Wave Detail: SW 4 ft at 5 seconds and E 2 ft at
11 seconds, becoming SW 5 ft at 6 seconds and E 2 ft at
11 seconds. A slight chance of rain in the afternoon.
.MON NIGHT...NW winds 20 to 25 kt. Seas 4 to 6 ft, subsiding to
4 to 5 ft after midnight.
.TUE...NW winds 15 to 20 kt. Seas 3 to 4 ft.
.TUE NIGHT...NW winds 10 kt. Seas 2 ft.
.WED...W winds 10 to 15 kt. Seas 2 ft.
.WED NIGHT...W winds 10 to 15 kt. Seas 2 to 3 ft.

$$

AMZ352-271200-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
620 PM EST Fri Dec 26 2025

.TONIGHT...SW winds 5 to 10 kt, becoming W 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 4 seconds and E
2 ft at 9 seconds.
.SAT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 4 seconds and E 2 ft at 10 seconds.
.SAT NIGHT...S winds 5 kt, becoming E after midnight. Seas 2 to
3 ft. Wave Detail: E 2 ft at 10 seconds and S 1 foot at
4 seconds.
.SUN...E winds 5 kt. Seas 2 ft. Wave Detail: E 2 ft at 10 seconds
and SW 1 foot at 3 seconds. A slight chance of rain in the
morning.
.SUN NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt after
midnight. Seas 2 to 3 ft. Wave Detail: SW 2 ft at 3 seconds and E
2 ft at 10 seconds.
.MON...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
4 seconds and E 2 ft at 9 seconds, becoming SW 4 ft at 5 seconds
and E 2 ft at 11 seconds. A slight chance of rain in the morning,
then a chance of rain in the afternoon.
.MON NIGHT...NW winds 20 to 25 kt. Seas 4 to 5 ft.
.TUE...NW winds 15 to 20 kt. Seas 3 to 4 ft.
.TUE NIGHT...NW winds 10 to 15 kt. Seas 2 ft.
.WED...W winds 10 to 15 kt. Seas 2 ft.
.WED NIGHT...W winds 10 to 15 kt. Seas 2 ft.

$$

AMZ354-271200-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
620 PM EST Fri Dec 26 2025

.TONIGHT...SW winds 10 to 15 kt. Seas 2 to 3 ft. Wave Detail: SW
2 ft at 3 seconds and E 2 ft at 9 seconds.
.SAT...SW winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SW 2 ft
at 3 seconds and E 2 ft at 10 seconds.
.SAT NIGHT...SW winds 5 kt, becoming E after midnight. Seas 2 ft.
Wave Detail: E 2 ft at 12 seconds and SW 1 foot at 3 seconds.
.SUN...E winds 5 to 10 kt. Seas 2 ft. Wave Detail: E 2 ft at
11 seconds and SW 1 foot at 3 seconds.
.SUN NIGHT...S winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: S
2 ft at 3 seconds and E 2 ft at 11 seconds.
.MON...SW winds 10 to 15 kt, increasing to 15 to 20 kt in the
afternoon. Seas 3 to 4 ft. Wave Detail: SW 3 ft at 4 seconds and
E 2 ft at 9 seconds. A chance of rain in the afternoon.
.MON NIGHT...NW winds 20 to 25 kt. Seas 3 to 4 ft, building to
4 to 5 ft after midnight.
.TUE...NW winds 15 to 20 kt. Seas 3 to 4 ft.
.TUE NIGHT...NW winds 10 to 15 kt. Seas 2 to 3 ft.
.WED...W winds 10 to 15 kt. Seas 2 ft.
.WED NIGHT...W winds 10 to 15 kt. Seas 2 ft.

$$

AMZ374-271200-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
620 PM EST Fri Dec 26 2025

.TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt, becoming W
with gusts to 20 kt late. Seas 3 to 4 ft. Wave Detail: SW 3 ft at
4 seconds and E 3 ft at 9 seconds.
.SAT...W winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: SW 3 ft
at 4 seconds and E 3 ft at 11 seconds.
.SAT NIGHT...W winds 5 kt, becoming E after midnight. Seas 3 to
4 ft, subsiding to 2 to 3 ft after midnight. Wave Detail: E 3 ft
at 11 seconds and SW 2 ft at 4 seconds, becoming E 3 ft at
11 seconds and SW 1 foot at 3 seconds.
.SUN...E winds 5 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
11 seconds and SW 1 foot at 3 seconds. A slight chance of rain in
the afternoon.
.SUN NIGHT...S winds 5 to 10 kt, becoming SW 10 to 15 kt with
gusts to 20 kt after midnight. Seas 2 to 3 ft, building to 3 to
4 ft after midnight. Wave Detail: E 3 ft at 11 seconds and SW
1 foot at 2 seconds, becoming SW 3 ft at 4 seconds and E 3 ft at
10 seconds.
.MON...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: SW 4 ft at
4 seconds and E 3 ft at 9 seconds, becoming SW 5 ft at 5 seconds
and E 3 ft at 11 seconds. A chance of rain in the afternoon.
.MON NIGHT...NW winds 20 to 25 kt with gusts to 30 kt. Seas 4 to
6 ft, building to 5 to 7 ft after midnight. A slight chance of
rain in the evening.
.TUE...NW winds 20 to 25 kt. Seas 4 to 6 ft.
.TUE NIGHT...NW winds 15 kt. Seas 3 to 4 ft.
.WED...W winds 10 to 15 kt. Seas 2 to 3 ft.
.WED NIGHT...W winds 15 to 20 kt. Seas 3 to 4 ft.

$$



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