707
FZUS52 KCHS 180939
CWFCHS
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE CHARLESTON SC
539 AM EDT SAT APR 18 2026
SOUTH SANTEE RIVER SC TO ALTAMAHA SOUND GA OUT 60 NM, INCLUDING
CHARLESTON HARBOR AND GRAYS REEF NATIONAL MARINE SANCTUARY
AMZ300-182300-
539 AM EDT SAT APR 18 2026
.SYNOPSIS FOR THE COASTAL WATERS OF SOUTH COASTAL SOUTH CAROLINA
AND NORTH COASTAL GEORGIA...
ATLANTIC HIGH PRESSURE WILL PREVAIL THROUGH TODAY. A STRONG COLD
FRONT WILL PUSH ACROSS THE WATERS SUNDAY AFTERNOON AND EVENING
BRINGING A PERIOD OF HAZARDOUS WINDS AND SEAS. IMPROVING
CONDITIONS ARRIVE MONDAY AS HIGH PRESSURE QUICKLY RETURNS.
AMZ340-182300-
CHARLESTON HARBOR-
539 AM EDT SAT APR 18 2026
TODAY
S WINDS 5 KT, INCREASING TO 10 KT THIS AFTERNOON.
TONIGHT
S WINDS 10 KT.
SUN
SW WINDS 10 KT, BECOMING NW WITH GUSTS TO 20 KT IN THE
AFTERNOON. A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
N WINDS 10 TO 15 KT. A SLIGHT CHANCE OF SHOWERS IN
THE EVENING.
MON
NE WINDS 5 TO 10 KT.
MON NIGHT
S WINDS 5 KT, BECOMING NW AFTER MIDNIGHT.
TUE
NE WINDS 10 KT.
TUE NIGHT
SE WINDS 5 TO 10 KT.
WED
S WINDS 5 TO 10 KT.
WED NIGHT
SW WINDS 5 TO 10 KT.
AMZ360-182300-
COASTAL WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT
20 NM-
539 AM EDT SAT APR 18 2026
TODAY
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT LATE. SEAS
2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND SE 2 FT AT
8 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 2 FT AT 8 SECONDS.
SUN
SW WINDS 10 TO 15 KT, BECOMING NW 15 TO 20 KT IN THE
AFTERNOON. SEAS 3 TO 4 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND E
2 FT AT 8 SECONDS. A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT, BUILDING TO 4 TO 5 FT AFTER MIDNIGHT. WAVE DETAIL: E 4 FT
AT 8 SECONDS AND NW 3 FT AT 5 SECONDS, BECOMING NE 4 FT AT
5 SECONDS AND SW 1 FOOT AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS.
MON
NE WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT. WAVE DETAIL: NE 5 FT AT 7 SECONDS.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING NW 10 TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS.
TUE
NE WINDS 15 TO 20 KT. SEAS 3 TO 4 FT.
TUE NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WED
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
WED NIGHT
SW WINDS 15 TO 20 KT. SEAS 2 TO 3 FT.
AMZ362-182300-
COASTAL WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-
539 AM EDT SAT APR 18 2026
TODAY
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE
3 FT AT 8 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT.
WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN
SW WINDS 10 TO 15 KT, BECOMING W IN THE AFTERNOON. SEAS
3 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
N WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS AND N 3 FT AT 3 SECONDS. A
SLIGHT CHANCE OF SHOWERS IN THE EVENING.
MON
NE WINDS 15 TO 20 KT, BECOMING E 10 TO 15 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT. WAVE DETAIL: NE 5 FT AT 6 SECONDS.
MON NIGHT
SE WINDS 5 TO 10 KT, BECOMING W 10 TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: E 4 FT AT 8 SECONDS.
TUE
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE NIGHT
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WED
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WED NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
AMZ364-182300-
COASTAL WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM,
INCLUDING GRAYS REEF NATIONAL MARINE SANCTUARY-
539 AM EDT SAT APR 18 2026
TODAY
SW WINDS 5 TO 10 KT, BECOMING S 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 3 FT. WAVE DETAIL: S 3 FT AT
4 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND S 2 FT AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS
IN THE AFTERNOON.
SUN NIGHT
N WINDS 15 TO 20 KT, BECOMING NE 20 TO 25 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT, BUILDING TO 4 TO 5 FT AFTER MIDNIGHT.
WAVE DETAIL: E 4 FT AT 8 SECONDS AND NW 2 FT AT 3 SECONDS,
BECOMING NE 5 FT AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS IN THE
EVENING.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT. WAVE DETAIL: NE 5 FT AT 6 SECONDS.
MON NIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E
4 FT AT 8 SECONDS.
TUE
NE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT.
TUE NIGHT
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
SE WINDS 5 TO 10 KT. SEAS 2 TO 3 FT.
WED NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT.
AMZ380-182300-
WATERS FROM SOUTH SANTEE RIVER SC TO EDISTO BEACH SC EXTENDING
FROM 20 TO 60 NM-
539 AM EDT SAT APR 18 2026
TODAY
SW WINDS 10 KT. SEAS 3 FT. WAVE DETAIL: S 2 FT AT
4 SECONDS AND E 2 FT AT 8 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT, BECOMING SW 15 TO 20 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE
2 FT AT 8 SECONDS.
SUN
SW WINDS 15 TO 20 KT, BECOMING W IN THE AFTERNOON. SEAS
3 TO 4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 2 FT AT
8 SECONDS. A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. SEAS 4 TO
6 FT, BUILDING TO 6 TO 8 FT AFTER MIDNIGHT. WAVE DETAIL: NW 5 FT
AT 5 SECONDS AND E 5 FT AT 8 SECONDS, BECOMING NE 7 FT AT
6 SECONDS. A SLIGHT CHANCE OF TSTMS IN THE EVENING. A CHANCE OF
SHOWERS.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 6 TO 8 FT, SUBSIDING TO 5 TO 7 FT IN THE
AFTERNOON. WAVE DETAIL: NE 8 FT AT 8 SECONDS, BECOMING NE 7 FT AT
8 SECONDS.
MON NIGHT
E WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS 4 TO 5 FT. WAVE DETAIL: E 5 FT AT 8 SECONDS.
TUE
NE WINDS 15 TO 20 KT. SEAS 4 TO 5 FT.
TUE NIGHT
E WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
S WINDS 5 TO 10 KT. SEAS 3 FT.
WED NIGHT
SW WINDS 15 TO 20 KT. SEAS 3 FT.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ382-182300-
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA EXTENDING FROM 20 TO
60 NM-
539 AM EDT SAT APR 18 2026
TODAY
SW WINDS 10 KT. SEAS 3 FT. WAVE DETAIL: SE 3 FT AT
8 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN
SW WINDS 15 KT, BECOMING W IN THE AFTERNOON. SEAS 3 TO
4 FT. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
A SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON.
SUN NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 35 KT. SEAS 4 TO
6 FT, BUILDING TO 5 TO 7 FT AFTER MIDNIGHT. WAVE DETAIL: E 5 FT
AT 8 SECONDS AND NW 4 FT AT 4 SECONDS, BECOMING NE 7 FT AT
6 SECONDS. A SLIGHT CHANCE OF SHOWERS.
MON
NE WINDS 20 TO 25 KT, DIMINISHING TO 15 TO 20 KT IN THE
AFTERNOON. SEAS 6 TO 8 FT. WAVE DETAIL: NE 8 FT AT 7 SECONDS.
MON NIGHT
E WINDS 5 TO 10 KT, BECOMING N 10 TO 15 KT AFTER
MIDNIGHT. SEAS 4 TO 6 FT, SUBSIDING TO 4 TO 5 FT AFTER MIDNIGHT.
WAVE DETAIL: NE 6 FT AT 8 SECONDS, BECOMING NE 5 FT AT 8 SECONDS.
TUE
NE WINDS 15 TO 20 KT. SEAS 4 TO 5 FT.
TUE NIGHT
E WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
SE WINDS 5 TO 10 KT. SEAS 3 FT.
WED NIGHT
S WINDS 10 TO 15 KT. SEAS 3 FT.
AMZ384-182300-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-
539 AM EDT SAT APR 18 2026
TODAY
SW WINDS 10 KT. SEAS 3 FT. WAVE DETAIL: SE 3 FT AT
8 SECONDS.
TONIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN
W WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT
AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
SUN NIGHT
N WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. SEAS 4 TO
5 FT, BUILDING TO 5 TO 7 FT AFTER MIDNIGHT. WAVE DETAIL: SE 5 FT
AT 8 SECONDS AND NW 3 FT AT 4 SECONDS, BECOMING N 7 FT AT
6 SECONDS. A SLIGHT CHANCE OF SHOWERS.
MON
NE WINDS 20 TO 25 KT WITH GUSTS TO 30 KT. SEAS 6 TO 8 FT,
SUBSIDING TO 5 TO 7 FT IN THE AFTERNOON. WAVE DETAIL: NE 7 FT AT
7 SECONDS, BECOMING NE 7 FT AT 8 SECONDS.
MON NIGHT
NE WINDS 5 TO 10 KT. SEAS 4 TO 6 FT, SUBSIDING TO
4 TO 5 FT AFTER MIDNIGHT. WAVE DETAIL: NE 6 FT AT 8 SECONDS,
BECOMING NE 5 FT AT 8 SECONDS.
TUE
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT.
TUE NIGHT
E WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.
WED
SE WINDS 5 TO 10 KT. SEAS 3 FT.
WED NIGHT
S WINDS 10 TO 15 KT. SEAS 3 FT.
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