738
FZUS52 KCHS 201730
CWFCHS
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE CHARLESTON SC
1229 PM EST SAT DEC 20 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
AMZ300-210600-
1229 PM EST SAT DEC 20 2025
.SYNOPSIS FOR THE COASTAL WATERS OF SOUTH COASTAL SOUTH CAROLINA
AND NORTH COASTAL GEORGIA...
HIGH PRESSURE WILL PREVAIL OVER THE WEEKEND, WITH ANOTHER COLD
FRONT FORECAST TO IMPACT THE AREA MONDAY.
AMZ330-210600-
CHARLESTON HARBOR-
1230 PM EST SAT DEC 20 2025
THIS AFTERNOON
NE WINDS 5 TO 10 KT.
TONIGHT
VARIABLE WINDS 5 KT.
SUN
NW WINDS 5 KT.
SUN NIGHT
NE WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH
GUSTS TO 20 KT AFTER MIDNIGHT.
MON
NE WINDS 10 TO 15 KT.
MON NIGHT
NE WINDS 5 TO 10 KT.
TUE
SW WINDS 5 TO 10 KT.
TUE NIGHT
W WINDS 5 KT.
WED
N WINDS 5 KT.
WED NIGHT
NE WINDS 5 KT.
UNLESS OTHERWISE NOTED, WAVES 1 FOOT OR LESS.
CHARLESTON HARBOR WATER TEMPERATURE 54 DEGREES.
AMZ350-210600-
WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM-
1230 PM EST SAT DEC 20 2025
THIS AFTERNOON
NE WINDS 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS AND NE 2 FT AT 4 SECONDS.
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
3 TO 4 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND NE 2 FT AT
4 SECONDS.
SUN
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 9 SECONDS AND NE 1 FOOT AT 5 SECONDS.
SUN NIGHT
NE WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER
MIDNIGHT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND NE 2 FT AT
4 SECONDS, BECOMING NE 5 FT AT 5 SECONDS AND SE 3 FT AT
10 SECONDS.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 5 TO 7 FT. WAVE DETAIL: E 6 FT AT 10 SECONDS AND
NE 5 FT AT 6 SECONDS.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT, BECOMING E
5 TO 10 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT, SUBSIDING TO 4 TO 5 FT
AFTER MIDNIGHT. WAVE DETAIL: E 6 FT AT 9 SECONDS, BECOMING E 5 FT
AT 9 SECONDS.
TUE
SW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT.
TUE NIGHT
W WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WED NIGHT
NE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
AMZ352-210600-
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-
1230 PM EST SAT DEC 20 2025
THIS AFTERNOON
NE WINDS 10 KT. SEAS 3 FT. WAVE DETAIL: SE 3 FT
AT 9 SECONDS AND NE 1 FOOT AT 3 SECONDS.
TONIGHT
NE WINDS 5 TO 10 KT, BECOMING N AFTER MIDNIGHT. SEAS
3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND NE 1 FOOT AT
4 SECONDS.
SUN
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 9 SECONDS AND NE 1 FOOT AT 5 SECONDS.
SUN NIGHT
NE WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 4 TO 5 FT AFTER
MIDNIGHT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND NE 1 FOOT AT
5 SECONDS, BECOMING NE 5 FT AT 5 SECONDS AND SE 2 FT AT
10 SECONDS.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT, BUILDING TO 5 TO 6 FT IN THE
AFTERNOON. WAVE DETAIL: E 6 FT AT 10 SECONDS AND NE 5 FT AT
6 SECONDS, BECOMING E 6 FT AT 8 SECONDS.
MON NIGHT
NE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT, BECOMING E
5 TO 10 KT AFTER MIDNIGHT. SEAS 4 TO 6 FT, SUBSIDING TO 4 TO 5 FT
AFTER MIDNIGHT. WAVE DETAIL: E 6 FT AT 9 SECONDS, BECOMING E 5 FT
AT 9 SECONDS.
TUE
S WINDS 5 KT. SEAS 4 TO 5 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
N WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WED NIGHT
NE WINDS 5 KT. SEAS 2 TO 3 FT.
AMZ354-210600-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM, INCLUDING
GRAYS REEF NATIONAL MARINE SANCTUARY-
1230 PM EST SAT DEC 20 2025
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS 3 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS AND NE 1 FOOT AT 3 SECONDS.
TONIGHT
VARIABLE WINDS 5 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 9 SECONDS AND NE 1 FOOT AT 3 SECONDS.
SUN
NW WINDS 5 TO 10 KT, BECOMING N IN THE AFTERNOON. SEAS
2 TO 3 FT. WAVE DETAIL: SE 3 FT AT 9 SECONDS AND NE 1 FOOT AT
4 SECONDS.
SUN NIGHT
NE WINDS 10 TO 15 KT, INCREASING TO 20 TO 25 KT
AFTER MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 4 TO 5 FT AFTER
MIDNIGHT. WAVE DETAIL: SE 2 FT AT 9 SECONDS AND NE 1 FOOT AT
5 SECONDS, BECOMING NE 5 FT AT 5 SECONDS AND E 2 FT AT 9 SECONDS.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 6 FT, BUILDING TO 5 TO 6 FT IN THE
AFTERNOON. WAVE DETAIL: NE 5 FT AT 6 SECONDS AND E 3 FT AT
10 SECONDS, BECOMING E 6 FT AT 8 SECONDS AND NE 5 FT AT
5 SECONDS.
MON NIGHT
NE WINDS 15 TO 20 KT, BECOMING E 5 TO 10 KT AFTER
MIDNIGHT. SEAS 5 TO 6 FT, SUBSIDING TO 4 TO 5 FT AFTER MIDNIGHT.
WAVE DETAIL: E 6 FT AT 8 SECONDS, BECOMING E 5 FT AT 9 SECONDS.
TUE
S WINDS 5 KT. SEAS 4 TO 5 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
N WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
NE WINDS 5 KT. SEAS 2 TO 3 FT.
AMZ374-210600-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA FROM 20 TO 60 NM-
1230 PM EST SAT DEC 20 2025
THIS AFTERNOON
N WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: E 4 FT AT 9 SECONDS.
TONIGHT
N WINDS 5 KT, BECOMING NW AFTER MIDNIGHT. SEAS 3 TO
4 FT. WAVE DETAIL: E 4 FT AT 9 SECONDS AND NE 1 FOOT AT
3 SECONDS.
SUN
N WINDS 5 TO 10 KT. SEAS 3 FT. WAVE DETAIL: SE 3 FT AT
9 SECONDS AND NE 1 FOOT AT 4 SECONDS.
SUN NIGHT
NE WINDS 15 TO 20 KT, INCREASING TO 20 TO 25 KT
AFTER MIDNIGHT. SEAS 3 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER
MIDNIGHT. WAVE DETAIL: NE 3 FT AT 5 SECONDS AND E 3 FT AT
9 SECONDS, BECOMING NE 6 FT AT 6 SECONDS AND E 3 FT AT
10 SECONDS.
MON
NE WINDS 20 TO 25 KT. SEAS 6 TO 8 FT. WAVE DETAIL: NE 7 FT
AT 6 SECONDS AND E 7 FT AT 11 SECONDS.
MON NIGHT
E WINDS 15 TO 20 KT, BECOMING SE 10 TO 15 KT AFTER
MIDNIGHT. SEAS 6 TO 7 FT, SUBSIDING TO 5 TO 7 FT AFTER MIDNIGHT.
WAVE DETAIL: E 7 FT AT 9 SECONDS, BECOMING E 6 FT AT 9 SECONDS. A
SLIGHT CHANCE OF RAIN IN THE EVENING.
TUE
S WINDS 5 TO 10 KT. SEAS 5 TO 6 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. SEAS 4 TO 5 FT.
WED
NW WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED NIGHT
NE WINDS 5 TO 10 KT. SEAS 3 FT.
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