546  
FZUS52 KCHS 210939  
CWFCHS  
 
COASTAL WATERS FORECAST  
NATIONAL WEATHER SERVICE CHARLESTON SC  
539 AM EDT SAT MAR 21 2026  
 
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  
 
AMZ300-212300-  
539 AM EDT SAT MAR 21 2026  
 
.SYNOPSIS FOR THE COASTAL WATERS OF SOUTH COASTAL SOUTH CAROLINA  
AND NORTH COASTAL GEORGIA...  
HIGH PRESSURE WILL PREVAIL THROUGH THE WEEKEND. A BACKDOOR COLD  
FRONT WILL DROP THROUGH THE AREA EARLY NEXT WEEK, FOLLOWED BY  
ANOTHER AREA OF HIGH PRESSURE.  
 
 
 
AMZ330-212300-  
CHARLESTON HARBOR-  
539 AM EDT SAT MAR 21 2026  
   
TODAY  
W WINDS 10 KT.    
TONIGHT  
SW WINDS 5 TO 10 KT.    
SUN  
SW WINDS 5 TO 10 KT.    
SUN NIGHT  
SW WINDS 10 KT.    
MON  
SW WINDS 10 KT. A SLIGHT CHANCE OF SHOWERS IN THE  
AFTERNOON.    
MON NIGHT  
N WINDS 10 TO 15 KT, BECOMING NE 15 TO 20 KT WITH  
GUSTS TO 25 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT. A SLIGHT CHANCE  
OF TSTMS IN THE EVENING. A SLIGHT CHANCE OF SHOWERS.    
TUE  
NE WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.    
TUE NIGHT  
NE WINDS 10 TO 15 KT. A SLIGHT CHANCE OF SHOWERS.    
WED  
NE WINDS 5 KT. A SLIGHT CHANCE OF SHOWERS.   
WED NIGHT  
E WINDS 5 KT.  
 
WINDS AND WAVES HIGHER IN AND NEAR TSTMS.  
 
UNLESS OTHERWISE NOTED, WAVES 1 FOOT OR LESS.  
 
CHARLESTON HARBOR WATER TEMPERATURE 60 DEGREES.  
 
 
 
AMZ350-212300-  
WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20 NM-  
539 AM EDT SAT MAR 21 2026  
   
TODAY  
W WINDS 15 TO 20 KT, BECOMING SW 10 TO 15 KT WITH GUSTS  
TO 20 KT THIS AFTERNOON. SEAS 4 TO 5 FT. WAVE DETAIL: SW 3 FT AT  
4 SECONDS AND E 3 FT AT 10 SECONDS.    
TONIGHT  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW  
3 FT AT 4 SECONDS AND E 3 FT AT 10 SECONDS.    
SUN  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT  
AT 5 SECONDS AND E 2 FT AT 9 SECONDS.    
SUN NIGHT  
SW WINDS 15 TO 20 KT. SEAS 3 TO 4 FT. WAVE DETAIL:  
SW 4 FT AT 5 SECONDS AND E 2 FT AT 9 SECONDS.    
MON  
SW WINDS 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT. WAVE  
DETAIL: SW 4 FT AT 6 SECONDS AND E 2 FT AT 9 SECONDS. A SLIGHT  
CHANCE OF SHOWERS IN THE AFTERNOON.   
MON NIGHT  
NW WINDS 15 TO 20 KT, BECOMING NE 25 TO 30 KT AFTER  
MIDNIGHT. SEAS 3 TO 4 FT, BUILDING TO 4 TO 6 FT AFTER MIDNIGHT.  
WAVE DETAIL: SW 4 FT AT 6 SECONDS AND E 1 FOOT AT 9 SECONDS,  
BECOMING NE 5 FT AT 5 SECONDS AND SW 2 FT AT 5 SECONDS. A SLIGHT  
CHANCE OF TSTMS IN THE EVENING. A SLIGHT CHANCE OF SHOWERS.    
TUE  
NE WINDS 25 TO 30 KT. SEAS 7 TO 9 FT.    
TUE NIGHT  
NE WINDS 20 TO 25 KT. SEAS 5 TO 7 FT. A SLIGHT  
CHANCE OF SHOWERS.    
WED  
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE OF  
SHOWERS.    
WED NIGHT  
SE WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.  
 
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.  
 
 
 
AMZ352-212300-  
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM-  
539 AM EDT SAT MAR 21 2026  
   
TODAY  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E  
3 FT AT 10 SECONDS AND SW 2 FT AT 3 SECONDS.    
TONIGHT  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW  
3 FT AT 4 SECONDS AND E 3 FT AT 10 SECONDS.    
SUN  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: SW 3 FT  
AT 4 SECONDS AND E 3 FT AT 10 SECONDS.    
SUN NIGHT  
SW WINDS 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT.  
WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 2 FT AT 10 SECONDS.    
MON  
SW WINDS 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT. WAVE  
DETAIL: SW 3 FT AT 5 SECONDS AND E 2 FT AT 9 SECONDS. A SLIGHT  
CHANCE OF SHOWERS IN THE AFTERNOON.   
MON NIGHT  
W WINDS 15 TO 20 KT, BECOMING NE 25 TO 30 KT AFTER  
MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 3 TO 4 FT AFTER MIDNIGHT.  
WAVE DETAIL: SW 3 FT AT 5 SECONDS AND E 1 FOOT AT 9 SECONDS,  
BECOMING NE 4 FT AT 4 SECONDS AND SW 2 FT AT 4 SECONDS. A CHANCE  
OF TSTMS IN THE EVENING. A CHANCE OF SHOWERS.    
TUE  
NE WINDS 25 TO 30 KT. SEAS 6 TO 8 FT. A SLIGHT CHANCE OF  
SHOWERS.    
TUE NIGHT  
NE WINDS 20 TO 25 KT. SEAS 6 TO 8 FT. A CHANCE OF  
SHOWERS.    
WED  
NE WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. A SLIGHT CHANCE OF  
SHOWERS.    
WED NIGHT  
E WINDS 5 TO 10 KT. SEAS 3 TO 4 FT.  
 
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.  
 
 
 
AMZ354-212300-  
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM, INCLUDING  
GRAYS REEF NATIONAL MARINE SANCTUARY-  
539 AM EDT SAT MAR 21 2026  
   
TODAY  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E  
3 FT AT 10 SECONDS AND SW 2 FT AT 3 SECONDS.    
TONIGHT  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. WAVE DETAIL: E  
3 FT AT 10 SECONDS AND SW 2 FT AT 3 SECONDS.    
SUN  
W WINDS 10 TO 15 KT, BECOMING SW IN THE AFTERNOON. SEAS  
3 TO 4 FT. WAVE DETAIL: E 3 FT AT 10 SECONDS AND SW 2 FT AT  
4 SECONDS.    
SUN NIGHT  
SW WINDS 15 KT WITH GUSTS TO 20 KT. SEAS 3 TO 4 FT.  
WAVE DETAIL: S 3 FT AT 4 SECONDS AND E 3 FT AT 10 SECONDS.    
MON  
SW WINDS 10 TO 15 KT. SEAS 3 TO 4 FT, SUBSIDING TO 2 TO  
3 FT IN THE AFTERNOON. WAVE DETAIL: SW 3 FT AT 4 SECONDS AND E  
2 FT AT 9 SECONDS.    
MON NIGHT  
W WINDS 10 TO 15 KT, BECOMING NE 25 TO 30 KT AFTER  
MIDNIGHT. SEAS 2 TO 3 FT, BUILDING TO 3 TO 4 FT AFTER MIDNIGHT.  
WAVE DETAIL: SW 2 FT AT 4 SECONDS AND E 2 FT AT 9 SECONDS,  
BECOMING NE 4 FT AT 4 SECONDS AND SW 2 FT AT 4 SECONDS. A CHANCE  
OF SHOWERS WITH A SLIGHT CHANCE OF TSTMS.    
TUE  
NE WINDS 25 TO 30 KT. SEAS 6 TO 8 FT. A SLIGHT CHANCE OF  
SHOWERS.    
TUE NIGHT  
NE WINDS 20 TO 25 KT. SEAS 6 TO 8 FT. A CHANCE OF  
SHOWERS.    
WED  
NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT. A SLIGHT CHANCE OF  
SHOWERS.    
WED NIGHT  
E WINDS 5 TO 10 KT. SEAS 4 TO 5 FT.  
 
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.  
 
 
 
AMZ374-212300-  
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA FROM 20 TO 60 NM-  
539 AM EDT SAT MAR 21 2026  
   
TODAY  
SW WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E  
5 FT AT 10 SECONDS.    
TONIGHT  
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. SEAS 4 TO  
5 FT. WAVE DETAIL: E 5 FT AT 10 SECONDS AND SW 3 FT AT 4 SECONDS.   
SUN  
SW WINDS 10 TO 15 KT. SEAS 4 TO 5 FT. WAVE DETAIL: E 4 FT  
AT 10 SECONDS AND SW 3 FT AT 4 SECONDS.    
SUN NIGHT  
SW WINDS 10 TO 15 KT, INCREASING TO 15 TO 20 KT  
AFTER MIDNIGHT. SEAS 4 TO 5 FT. WAVE DETAIL: SW 4 FT AT 5 SECONDS  
AND E 3 FT AT 9 SECONDS.    
MON  
W WINDS 15 TO 20 KT, BECOMING SW 10 TO 15 KT IN THE  
AFTERNOON. SEAS 4 TO 5 FT, SUBSIDING TO 3 TO 4 FT IN THE  
AFTERNOON. WAVE DETAIL: SW 4 FT AT 5 SECONDS AND E 2 FT AT  
9 SECONDS.    
MON NIGHT  
SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT, BECOMING  
NE 20 TO 25 KT WITH GUSTS TO 35 KT AFTER MIDNIGHT. SEAS 3 TO  
4 FT, BUILDING TO 4 TO 5 FT AFTER MIDNIGHT. WAVE DETAIL: SW 3 FT  
AT 4 SECONDS AND E 2 FT AT 9 SECONDS, BECOMING N 5 FT AT  
4 SECONDS AND W 3 FT AT 4 SECONDS. A CHANCE OF SHOWERS WITH A  
SLIGHT CHANCE OF TSTMS.    
TUE  
NE WINDS 25 TO 30 KT. SEAS 7 TO 9 FT. A SLIGHT CHANCE OF  
SHOWERS.    
TUE NIGHT  
E WINDS 20 TO 25 KT. SEAS 8 TO 10 FT. A CHANCE OF  
SHOWERS.    
WED  
E WINDS 10 TO 15 KT. SEAS 5 TO 7 FT. A SLIGHT CHANCE OF  
SHOWERS.    
WED NIGHT  
E WINDS 5 TO 10 KT. SEAS 4 TO 6 FT.  
 
WINDS AND SEAS HIGHER IN AND NEAR TSTMS.  
 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.
The Nexlab SC Page
The Nexlab GA Page
Main Text Page