147
FZUS52 KCHS 212116
CWFCHS
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE CHARLESTON SC
516 PM EDT TUE JUL 21 2026
SOUTH SANTEE RIVER SC TO ALTAMAHA SOUND GA OUT 60 NM, INCLUDING
CHARLESTON HARBOR AND GRAYS REEF NATIONAL MARINE SANCTUARY
AMZ300-221130-
516 PM EDT TUE JUL 21 2026
.SYNOPSIS FOR THE COASTAL WATERS OF SOUTH COASTAL SOUTH CAROLINA
AND NORTH COASTAL GEORGIA...
HIGH PRESSURE WILL REMAIN CENTERED OVER THE WESTERN ATLANTIC
WHILE A BROAD AREA OF LOW PRESSURE LINGERS ACROSS THE CENTRAL
CAROLINAS INTO WEDNESDAY. A COLD FRONT WILL SLOWLY APPROACH
WEDNESDAY INTO THURSDAY, POSSIBLY BECOMING STATIONARY ALONG THE
COAST THROUGH THIS WEEKEND.
AMZ340-221130-
CHARLESTON HARBOR-
516 PM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY MORNING
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 1 TO
2 FT. A SLIGHT CHANCE OF SHOWERS AND TSTMS LATE.
WED
SW WINDS 15 KT WITH GUSTS TO 20 KT.
WED NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT.
THU
SW WINDS 10 TO 15 KT.
THU NIGHT
S WINDS 10 KT. A SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT.
FRI
S WINDS 10 KT. A SLIGHT CHANCE OF SHOWERS AND TSTMS IN THE
MORNING, THEN A CHANCE OF SHOWERS AND TSTMS IN THE AFTERNOON.
FRI NIGHT
S WINDS 5 TO 10 KT. A CHANCE OF SHOWERS AND TSTMS,
MAINLY IN THE EVENING.
SAT
SW WINDS 5 TO 10 KT. SHOWERS LIKELY WITH A CHANCE OF
TSTMS.
SAT NIGHT
SW WINDS 5 TO 10 KT. A CHANCE OF SHOWERS AND TSTMS.
SUN
W WINDS 5 TO 10 KT. SHOWERS AND TSTMS LIKELY.
SUN NIGHT
SW WINDS 5 TO 10 KT. A CHANCE OF SHOWERS AND TSTMS.
WINDS AND WAVES HIGHER IN AND NEAR TSTMS.
UNLESS OTHERWISE NOTED, WAVES 1 FOOT OR LESS.
CHARLESTON HARBOR WATER TEMPERATURE 86 DEGREES.
AMZ360-221130-
COASTAL WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT
20 NM-
516 PM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT, INCREASING TO
20 TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: S 6 FT AT 6 SECONDS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 6 FT,
SUBSIDING TO 3 TO 5 FT IN THE AFTERNOON. WAVE DETAIL: S 5 FT AT 7
SECONDS, BECOMING S 4 FT AT 7 SECONDS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 5 FT AT 6 SECONDS.
THU
SW WINDS 15 TO 20 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT, SUBSIDING TO 3 TO 4 FT IN THE
AFTERNOON. WAVE DETAIL: S 4 FT AT 7 SECONDS, BECOMING SW 3 FT AT
5 SECONDS AND SE 2 FT AT 8 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT.
WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS. A
SLIGHT CHANCE OF SHOWERS AND TSTMS AFTER MIDNIGHT.
FRI
S WINDS 10 TO 15 KT. SEAS 3 FT. WAVE DETAIL: S 3 FT AT
5 SECONDS AND SE 3 FT AT 8 SECONDS. A SLIGHT CHANCE OF SHOWERS
AND TSTMS.
FRI NIGHT
S WINDS 5 TO 10 KT. SEAS 3 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS.
SAT
SW WINDS 10 TO 15 KT. SEAS 3 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
W WINDS 10 TO 15 KT. SEAS 3 FT. A CHANCE OF SHOWERS AND
TSTMS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ362-221130-
COASTAL WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-
516 PM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE WEDNESDAY NIGHT
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT, INCREASING TO
20 TO 25 KT. SEAS 4 TO 6 FT. WAVE DETAIL: SE 6 FT AT 7 SECONDS.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO 5 FT.
WAVE DETAIL: S 4 FT AT 7 SECONDS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 3 TO
5 FT. WAVE DETAIL: SE 5 FT AT 6 SECONDS.
THU
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT.
WAVE DETAIL: S 3 FT AT 6 SECONDS.
THU NIGHT
S WINDS 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.
FRI
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. WAVE DETAIL: S 3 FT
AT 4 SECONDS AND SE 3 FT AT 8 SECONDS. A SLIGHT CHANCE OF SHOWERS
AND TSTMS IN THE AFTERNOON.
FRI NIGHT
S WINDS 10 KT. SEAS 3 FT. A SLIGHT CHANCE OF SHOWERS
AND TSTMS.
SAT
SW WINDS 10 KT. SEAS 3 FT. A CHANCE OF SHOWERS AND TSTMS.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN NIGHT
SW WINDS 10 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ364-221130-
COASTAL WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM,
INCLUDING GRAYS REEF NATIONAL MARINE SANCTUARY-
516 PM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT INCREASING TO
20 TO 25 KT. SEAS 4 TO 5 FT. WAVE DETAIL: S 5 FT AT 6 SECONDS.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 5 FT.
WAVE DETAIL: SE 4 FT AT 6 SECONDS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: SE 5 FT AT 6 SECONDS.
THU
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT WITH GUSTS TO
20 KT IN THE AFTERNOON. SEAS 3 TO 4 FT, SUBSIDING TO 2 TO 3 FT IN
THE AFTERNOON. WAVE DETAIL: SE 3 FT AT 5 SECONDS AND SE 1 FOOT AT
8 SECONDS, BECOMING SE 3 FT AT 8 SECONDS AND SE 2 FT AT
5 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
FRI
SW WINDS 5 TO 10 KT, BECOMING S 10 TO 15 KT IN THE
AFTERNOON. SEAS 2 TO 3 FT. WAVE DETAIL: S 2 FT AT 4 SECONDS AND
SE 2 FT AT 8 SECONDS.
FRI NIGHT
S WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A SLIGHT CHANCE
OF SHOWERS AND TSTMS.
SAT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS AND TSTMS.
SUN
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A SLIGHT
CHANCE OF SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ380-221130-
WATERS FROM SOUTH SANTEE RIVER SC TO EDISTO BEACH SC EXTENDING
FROM 20 TO 60 NM-
516 PM EDT TUE JUL 21 2026
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT, INCREASING TO
20 TO 25 KT. SEAS 5 TO 6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS.
WED
SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 5 TO 6 FT,
SUBSIDING TO 4 TO 5 FT IN THE AFTERNOON. WAVE DETAIL: S 5 FT AT
7 SECONDS, BECOMING S 4 FT AT 7 SECONDS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: SE 5 FT AT 7 SECONDS.
THU
SW WINDS 15 TO 20 KT, DIMINISHING TO 10 TO 15 KT IN THE
AFTERNOON. SEAS 4 TO 5 FT, SUBSIDING TO 3 TO 4 FT IN THE
AFTERNOON. WAVE DETAIL: S 4 FT AT 7 SECONDS, BECOMING SW 3 FT AT
5 SECONDS AND SE 3 FT AT 8 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT.
WAVE DETAIL: SE 3 FT AT 8 SECONDS AND SW 2 FT AT 5 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS 3 FT. WAVE DETAIL: SE 3 FT AT
8 SECONDS AND SW 2 FT AT 4 SECONDS.
FRI NIGHT
S WINDS 5 TO 10 KT. SEAS 3 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT.
SAT
SW WINDS 10 KT. SEAS 3 FT. A CHANCE OF SHOWERS AND TSTMS.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. SHOWERS LIKELY
WITH A CHANCE OF TSTMS.
SUN
W WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ382-221130-
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA EXTENDING FROM 20 TO
60 NM-
516 PM EDT TUE JUL 21 2026
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT, INCREASING TO
20 TO 25 KT. SEAS 5 TO 6 FT. WAVE DETAIL: S 6 FT AT 7 SECONDS.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 6 FT.
WAVE DETAIL: S 4 FT AT 7 SECONDS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 5 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
THU
SW WINDS 10 TO 15 KT. SEAS 4 TO 5 FT, SUBSIDING TO 3 TO
4 FT IN THE AFTERNOON. WAVE DETAIL: SW 3 FT AT 5 SECONDS AND SE
3 FT AT 8 SECONDS, BECOMING SE 3 FT AT 8 SECONDS AND SW 2 FT AT
5 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
FRI
S WINDS 10 TO 15 KT, DIMINISHING TO 5 TO 10 KT IN THE
AFTERNOON. SEAS 3 FT. WAVE DETAIL: SE 3 FT AT 8 SECONDS.
FRI NIGHT
S WINDS 10 KT. SEAS 3 TO 4 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS AFTER MIDNIGHT.
SAT
SW WINDS 10 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS AND TSTMS.
SUN
W WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
AMZ384-221130-
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 TO
60 NM-
516 PM EDT TUE JUL 21 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH WEDNESDAY EVENING
TONIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT, INCREASING TO
20 TO 25 KT. SEAS 5 TO 6 FT. WAVE DETAIL: SE 5 FT AT 6 SECONDS.
WED
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO 5 FT.
WAVE DETAIL: SE 4 FT AT 7 SECONDS.
WED NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. SEAS 4 TO
5 FT. WAVE DETAIL: S 4 FT AT 5 SECONDS AND SE 3 FT AT 8 SECONDS.
THU
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT, DIMINISHING TO
5 TO 10 KT IN THE AFTERNOON. SEAS 3 TO 4 FT, SUBSIDING TO 2 TO
3 FT IN THE AFTERNOON. WAVE DETAIL: S 3 FT AT 5 SECONDS AND SE
3 FT AT 8 SECONDS, BECOMING SE 3 FT AT 8 SECONDS AND S 2 FT AT
5 SECONDS.
THU NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 3 FT.
WAVE DETAIL: S 3 FT AT 4 SECONDS AND SE 3 FT AT 8 SECONDS.
FRI
S WINDS 5 TO 10 KT. SEAS 2 TO 3 FT. WAVE DETAIL: SE 3 FT
AT 8 SECONDS AND S 2 FT AT 4 SECONDS.
FRI NIGHT
S WINDS 10 KT. SEAS 2 TO 3 FT.
SAT
SW WINDS 10 KT. SEAS 3 FT. A SLIGHT CHANCE OF SHOWERS AND
TSTMS.
SAT NIGHT
SW WINDS 10 TO 15 KT. SEAS 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
W WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN NIGHT
SW WINDS 10 TO 15 KT. SEAS 2 TO 3 FT. A CHANCE OF
SHOWERS AND TSTMS.
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.
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