590   
FZUS51 KLWX 181435  
CWFLWX  
  
COASTAL WATERS FORECAST  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1035 AM EDT THU SEP 18 2025  
  
TIDAL POTOMAC RIVER AND MARYLAND PORTION OF CHESAPEAKE BAY.  
  
FORECASTS OF WAVE HEIGHTS DO NOT INCLUDE EFFECTS OF WIND DIRECTION  
RELATIVE TO TIDAL CURRENTS. EXPECT HIGHER WAVES WHEN WINDS ARE  
BLOWING AGAINST THE TIDAL FLOW.  WAVES FLAT WHERE WATERS ARE ICED OVER.  
  
ANZ500-182000-  
1035 AM EDT THU SEP 18 2025  
  
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...  
  
AN AREA OF LOW PRESSURE OVER THE VIRGINIA TIDEWATER WILL  DISSIPATE  
TODAY, WITH WEAK HIGH PRESSURE BUILDING OVER THE REGION. A  COLD  
FRONT WILL MOVE ACROSS THE WATERS FRIDAY NIGHT. SMALL CRAFT   
ADVISORIES FOR NORTHERLY CHANNELING ARE POSSIBLE FRIDAY NIGHT INTO   
SATURDAY MORNING, AND AGAIN SATURDAY EVENING FOR PARTS OF THE  
WATERS.   
  
  
  
ANZ535-182000-  
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS AROUND 5 KT. WAVES 1 FT.    
FRI  
NW WINDS AROUND 5 KT. WAVES 1 FT.    
FRI NIGHT  
N WINDS AROUND 5 KT. WAVES 1 FT.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 KT. WAVES LESS THAN 1 FT.    
SUN  
E WINDS AROUND 5 KT. WAVES 1 FT.    
MON  
SE WINDS AROUND 5 KT. WAVES 1 FT.    
  
  
  
ANZ536-182000-  
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS AROUND 5 KT. WAVES 1 FT.    
FRI  
NW WINDS AROUND 5 KT. WAVES 1 FT.    
FRI NIGHT  
SE WINDS AROUND 5 KT. WAVES 1 FT.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS AROUND 5 KT. WAVES 1 FT.    
  
  
  
ANZ537-182000-  
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
FRI  
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
FRI NIGHT...S WINDS AROUND 5 KT  
BECOMING NW AFTER MIDNIGHT. WAVES  
FLAT.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 10 KT. WAVES 2 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.    
MON...E WINDS 5 TO 10 KT  
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.    
  
  
  
ANZ530-182000-  
CHESAPEAKE BAY NORTH OF POOLES ISLAND-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES FLAT.    
TONIGHT  
SW WINDS 5 KT. WAVES FLAT.    
FRI  
NW WINDS 5 KT. WAVES FLAT.    
FRI NIGHT  
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
S WINDS 5 KT. WAVES FLAT.    
  
  
  
ANZ531-182000-  
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI  
W WINDS 5 KT. WAVES FLAT.    
FRI NIGHT  
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
  
  
  
ANZ538-182000-  
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES FLAT.    
TONIGHT  
SW WINDS AROUND 5 KT. WAVES FLAT.    
FRI  
NW WINDS 5 KT. WAVES FLAT.    
FRI NIGHT  
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 KT. WAVES LESS THAN 1 FT.    
  
  
  
ANZ539-182000-  
CHESTER RIVER TO QUEENSTOWN MD-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI  
W WINDS AROUND 5 KT. WAVES FLAT.    
FRI NIGHT...S WINDS AROUND 5 KT  
BECOMING NE AFTER MIDNIGHT. WAVES  
1 FT OR LESS.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
S WINDS 5 KT. WAVES LESS THAN 1 FT.    
  
  
  
ANZ532-182000-  
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
N WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI NIGHT...S WINDS 5 KT  
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT  
OR LESS.    
SAT  
NE WINDS 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
  
  
  
ANZ540-182000-  
EASTERN BAY-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI  
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
FRI NIGHT...S WINDS AROUND 5 KT  
BECOMING NE AFTER MIDNIGHT. WAVES  
1 FT OR LESS.    
SAT  
NE WINDS 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 KT. WAVES LESS THAN 1 FT.    
  
  
  
ANZ533-182000-  
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI NIGHT...S WINDS 5 KT  
BECOMING NE AFTER MIDNIGHT. WAVES 1 FT  
OR LESS.    
SAT  
NE WINDS 10 KT. WAVES 1 TO 2 FT.    
SAT NIGHT  
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
  
  
  
ANZ541-182000-  
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI  
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
FRI NIGHT...S WINDS AROUND 5 KT  
BECOMING NE AFTER MIDNIGHT. WAVES  
1 FT OR LESS.    
SAT  
NE WINDS 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
  
  
  
ANZ542-182000-  
PATUXENT RIVER TO BROOMES ISLAND MD-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
TONIGHT  
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI  
NW WINDS AROUND 5 KT. WAVES 1 FT.    
FRI NIGHT  
E WINDS AROUND 5 KT. WAVES 1 FT.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 KT. WAVES LESS THAN 1 FT.    
  
  
  
ANZ534-182000-  
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
TONIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI  
W WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI NIGHT...S WINDS 5 KT  
BECOMING W AFTER MIDNIGHT. WAVES 1 FT OR  
LESS.    
SAT  
NE WINDS 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 10 TO 15 KT. WAVES 2 FT.    
SUN  
E WINDS 10 KT. WAVES 1 TO 2 FT.    
MON...SE WINDS 5 TO 10 KT  
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.   
  
  
  
ANZ543-182000-  
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-  
1035 AM EDT THU SEP 18 2025  
   
REST OF TODAY  
NW WINDS 10 KT. WAVES 1 FT.    
TONIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI  
W WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI NIGHT  
SW WINDS 5 TO 10 KT. WAVES FLAT.    
SAT  
NE WINDS 5 TO 10 KT. WAVES 1 FT.    
SAT NIGHT  
E WINDS 10 TO 15 KT. WAVES 1 FT.    
SUN  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON...SE WINDS 5 TO 10 KT  
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.   
  
  
 
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