854
FZUS52 KCHS 180939
CWFCHS
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE CHARLESTON SC
539 AM EDT SAT JUL 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 JUL 18 2026
.SYNOPSIS FOR THE COASTAL WATERS OF SOUTH COASTAL SOUTH CAROLINA
AND NORTH COASTAL GEORGIA...
HIGH PRESSURE WILL BECOME THE MORE PROMINENT FEATURE ACROSS THE
WESTERN ATLANTIC THIS WEEKEND WHILE WEAK LOW PRESSURE REMAINS
INLAND THROUGH EARLY NEXT WEEK.
AMZ340-182300-
CHARLESTON HARBOR-
539 AM EDT SAT JUL 18 2026
TODAY
S WINDS 5 TO 10 KT, INCREASING TO 10 TO 15 KT WITH GUSTS
TO 20 KT THIS AFTERNOON.
TONIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT.
SUN
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT IN THE
AFTERNOON. WAVES 1 TO 2 FT.
SUN NIGHT
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. A SLIGHT
CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
MON
SW WINDS 10 TO 15 KT. A SLIGHT CHANCE OF SHOWERS AND
TSTMS.
MON NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. A CHANCE OF
SHOWERS AND TSTMS.
TUE
SW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
SW WINDS 15 KT. A CHANCE OF SHOWERS AND TSTMS.
WED
SW WINDS 15 TO 20 KT. WAVES 1 TO 2 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
WED NIGHT
SW WINDS 10 TO 15 KT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
WINDS AND WAVES HIGHER IN AND NEAR TSTMS.
UNLESS OTHERWISE NOTED, WAVES 1 FOOT OR LESS.
CHARLESTON HARBOR WATER TEMPERATURE 86 DEGREES.
AMZ360-182300-
COASTAL WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT
20 NM-
539 AM EDT SAT JUL 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TONIGHT...
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT, INCREASING TO
15 TO 20 KT WITH GUSTS TO 25 KT LATE. SEAS 2 TO 3 FT. WAVE
DETAIL: S 3 FT AT 4 SECONDS AND E 1 FOOT AT 8 SECONDS.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 5 FT AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS.
A SLIGHT CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 5 FT.
WAVE DETAIL: S 5 FT AT 6 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 5 FT AT 5 SECONDS. A SLIGHT CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT.
MON
SW WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 5 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS. A CHANCE OF SHOWERS AND
TSTMS.
TUE
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
SW WINDS 20 TO 25 KT. SEAS 5 TO 6 FT. A CHANCE OF
SHOWERS AND TSTMS.
WED
SW WINDS 20 TO 25 KT. SEAS 5 TO 7 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED NIGHT
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. SHOWERS LIKELY
WITH A CHANCE OF TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ362-182300-
COASTAL WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-
539 AM EDT SAT JUL 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM THIS EVENING THROUGH LATE
TONIGHT...
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 1 FOOT AT 8 SECONDS.
TONIGHT
SW 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: S 4 FT
AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS, BECOMING S 5 FT AT
6 SECONDS.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO 4 FT.
WAVE DETAIL: S 4 FT AT 6 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
MON
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: SE 3 FT AT 6 SECONDS. A SLIGHT CHANCE OF SHOWERS AND
TSTMS.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS. A CHANCE OF SHOWERS AND
TSTMS.
TUE
SW WINDS 15 TO 20 KT. SEAS 4 TO 5 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS AND TSTMS.
WED
SW WINDS 20 TO 25 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
WED NIGHT
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ364-182300-
COASTAL WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM,
INCLUDING GRAYS REEF NATIONAL MARINE SANCTUARY-
539 AM EDT SAT JUL 18 2026
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT, INCREASING TO
15 TO 20 KT LATE. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT
4 SECONDS AND E 1 FOOT AT 7 SECONDS.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND E 1 FOOT AT 7 SECONDS.
SUN
SW WINDS 10 TO 15 KT, BECOMING S 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 6 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT, BECOMING SW 10 TO 15 KT AFTER
MIDNIGHT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS. A
SLIGHT CHANCE OF SHOWERS AND TSTMS.
MON
SW WINDS 10 TO 15 KT, BECOMING S 15 TO 20 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT AT 5 SECONDS AND E
1 FOOT AT 8 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
MON NIGHT
S WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SE
3 FT AT 5 SECONDS. A CHANCE OF SHOWERS. A CHANCE OF TSTMS, MAINLY
IN THE EVENING.
TUE
S WINDS 20 TO 25 KT. SEAS 4 TO 5 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
S WINDS 20 TO 25 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
WED
SW WINDS 15 TO 20 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
WED NIGHT
SW WINDS 15 TO 20 KT. SEAS 4 TO 5 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ380-182300-
WATERS FROM SOUTH SANTEE RIVER SC TO EDISTO BEACH SC EXTENDING
FROM 20 TO 60 NM-
539 AM EDT SAT JUL 18 2026
TODAY
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT, BUILDING TO 3 TO
4 FT THIS AFTERNOON. WAVE DETAIL: S 2 FT AT 4 SECONDS AND E
1 FOOT AT 8 SECONDS, BECOMING SW 3 FT AT 5 SECONDS AND E 1 FOOT
AT 8 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS LATE THIS
MORNING.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT, BUILDING TO 5 TO 6 FT AFTER MIDNIGHT. WAVE DETAIL: S 5 FT
AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS, BECOMING S 6 FT AT
6 SECONDS.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 6 FT,
SUBSIDING TO 4 TO 5 FT IN THE AFTERNOON. WAVE DETAIL: S 5 FT AT
6 SECONDS, BECOMING SW 5 FT AT 6 SECONDS AND SE 2 FT AT
8 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND E 1 FOOT AT
8 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
MON
SW WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S 4 FT
AT 6 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 4 FT AT 6 SECONDS. A SLIGHT CHANCE OF
SHOWERS AND TSTMS IN THE EVENING, THEN A CHANCE OF SHOWERS AND
TSTMS AFTER MIDNIGHT.
TUE
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
SW WINDS 20 TO 25 KT. SEAS 6 TO 8 FT. A CHANCE OF
SHOWERS AND TSTMS.
WED
SW WINDS 20 TO 25 KT. SEAS 6 TO 8 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED NIGHT
SW WINDS 20 TO 25 KT. SEAS 5 TO 7 FT. SHOWERS LIKELY
WITH A CHANCE OF TSTMS.
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 JUL 18 2026
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS.
TONIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 5 FT AT 6 SECONDS.
SUN
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 5 FT,
SUBSIDING TO 3 TO 4 FT IN THE AFTERNOON. WAVE DETAIL: S 4 FT AT
6 SECONDS, BECOMING S 3 FT AT 6 SECONDS.
SUN NIGHT
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS. A SLIGHT CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT.
MON
SW WINDS 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT. WAVE
DETAIL: S 3 FT AT 6 SECONDS. A SLIGHT CHANCE OF SHOWERS AND TSTMS
IN THE MORNING.
MON NIGHT
S 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: S 4 FT
AT 5 SECONDS AND SE 2 FT AT 8 SECONDS, BECOMING S 4 FT AT
6 SECONDS. A CHANCE OF SHOWERS AND TSTMS.
TUE
SW WINDS 20 TO 25 KT. SEAS 4 TO 5 FT. A CHANCE OF SHOWERS
AND TSTMS.
TUE NIGHT
S WINDS 20 TO 25 KT. SEAS 5 TO 7 FT. A CHANCE OF
SHOWERS AND TSTMS.
WED
SW WINDS 20 TO 25 KT. SEAS 5 TO 6 FT. A CHANCE OF SHOWERS
AND TSTMS.
WED NIGHT
SW WINDS 20 TO 25 KT. SEAS 4 TO 6 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ384-182300-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-
539 AM EDT SAT JUL 18 2026
TODAY
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 2 TO 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 1 FOOT AT 8 SECONDS.
TONIGHT
S 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: S 4 FT
AT 5 SECONDS AND E 1 FOOT AT 8 SECONDS, BECOMING S 5 FT AT
6 SECONDS.
SUN
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT.
WAVE DETAIL: SW 4 FT AT 6 SECONDS.
SUN NIGHT
S WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL: S
3 FT AT 5 SECONDS AND SE 2 FT AT 8 SECONDS. A SLIGHT CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT.
MON
S WINDS 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT. WAVE DETAIL:
S 3 FT AT 5 SECONDS AND SE 1 FOOT AT 8 SECONDS. A SLIGHT CHANCE
OF SHOWERS AND TSTMS IN THE MORNING.
MON NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
4 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
A CHANCE OF SHOWERS AND TSTMS.
TUE
S WINDS 15 TO 20 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
TUE NIGHT
S WINDS 20 TO 25 KT. SEAS 4 TO 5 FT. A CHANCE OF
SHOWERS AND TSTMS.
WED
SW WINDS 15 TO 20 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
WED NIGHT
S WINDS 20 TO 25 KT. SEAS 4 TO 5 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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