636  
FZUS51 KLWX 132318  
CWFLWX  
 
COASTAL WATERS FORECAST  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
718 PM EDT MON JUL 13 2026  
 
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.  
 
ANZ500-140800-  
718 PM EDT MON JUL 13 2026  
 
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...  
 
HIGH PRESSURE WILL REMAIN OVERHEAD THROUGH TUESDAY. A PERIOD OF  
SOUTHERLY CHANNELING MAY RESULT IN BRIEF SMALL CRAFT ADVISORY  
CONDITIONS TUESDAY AFTERNOON AND EVENING. HIGH PRESSURE WILL SHIFT  
TO THE SOUTH THE SECOND HALF OF THE WEEK. A WEAK COLD FRONT WILL  
DROP SOUTHWARD THURSDAY INTO FRIDAY, THEN A STRONGER COLD FRONT WILL  
APPROACH FROM THE NORTH SATURDAY.  
 

 
 
ANZ535-140800-  
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT.    
TUE
 
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
WED
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
NW WINDS AROUND 5 KT. WAVES 1 FT.    
THU NIGHT
 
NW WINDS AROUND 5 KT. WAVES 1 FT.    
FRI...NW WINDS AROUND 5 KT
 
BECOMING SW. WAVES 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ536-140800-  
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT...SE WINDS 5 TO 10 KT
 
BECOMING SW LATE. WAVES 1 FT OR  
LESS.    
TUE
 
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT.    
WED
 
W WINDS AROUND 5 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
NW WINDS AROUND 5 KT. WAVES 1 FT.    
THU NIGHT
 
W WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI
 
W WINDS AROUND 5 KT. WAVES 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ537-140800-  
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT...SE WINDS 5 TO 10 KT
 
BECOMING SW LATE. WAVES 1 FT OR  
LESS.    
TUE
 
SW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
W WINDS AROUND 5 KT. WAVES 1 FT.    
THU NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI...N WINDS 5 TO 10 KT
 
BECOMING S. WAVES 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ530-140800-  
CHESAPEAKE BAY NORTH OF POOLES ISLAND-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT...S WINDS 5 TO 10 KT
 
BECOMING SW LATE. WAVES 1 FT.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE NIGHT
 
SW WINDS 10 TO 15 KT. WAVES 1 FT.    
WED
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
W WINDS AROUND 5 KT. WAVES 1 FT.    
THU NIGHT
 
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI
 
NW WINDS 5 KT. WAVES LESS THAN 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ531-140800-  
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE NIGHT...SW WINDS 10 TO 15 KT
 
BECOMING 10 KT LATE. WAVES 1 TO  
2 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU...NW WINDS AROUND 5 KT
 
BECOMING SW IN THE AFTERNOON. WAVES  
1 FT OR LESS.    
THU NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI...NW WINDS 5 TO 10 KT
 
BECOMING S. WAVES 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ538-140800-  
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
THU
 
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
THU NIGHT
 
NW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.   
FRI
 
W WINDS 5 KT. WAVES LESS THAN 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ539-140800-  
CHESTER RIVER TO QUEENSTOWN MD-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
THU NIGHT
 
W WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI
 
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ532-140800-  
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 10 KT. WAVES 2 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU...N WINDS 5 KT
 
BECOMING SW IN THE AFTERNOON. WAVES 1 FT.    
THU NIGHT...SW WINDS 5 TO 10 KT
 
BECOMING NW AFTER MIDNIGHT. WAVES  
1 FT.    
FRI...NE WINDS 5 KT
 
BECOMING S. WAVES 1 FT.    
SAT
 
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ540-140800-  
EASTERN BAY-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 10 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
THU NIGHT...SW WINDS 5 TO 10 KT
 
BECOMING NW AFTER MIDNIGHT. WAVES  
1 FT.    
FRI
 
W WINDS 5 KT. WAVES LESS THAN 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ533-140800-  
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...SW WINDS AROUND 5 KT
 
BECOMING S LATE. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 10 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU...NW WINDS 5 KT
 
BECOMING SW IN THE AFTERNOON. WAVES 1 FT.    
THU NIGHT...SW WINDS 5 TO 10 KT
 
BECOMING NW AFTER MIDNIGHT. WAVES  
1 FT.    
FRI...NE WINDS 5 TO 10 KT
 
BECOMING S. WAVES 1 FT.    
SAT
 
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ541-140800-  
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE
 
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 10 TO 15 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
W WINDS AROUND 5 KT. WAVES 1 FT.    
THU NIGHT...SW WINDS 5 TO 10 KT
 
BECOMING NW AFTER MIDNIGHT. WAVES  
1 FT.    
FRI...N WINDS 5 KT
 
BECOMING S. WAVES 1 FT OR LESS.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ542-140800-  
PATUXENT RIVER TO BROOMES ISLAND MD-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
S WINDS 5 KT. WAVES LESS THAN 1 FT.    
TUE...SW WINDS AROUND 5 KT
 
BECOMING S LATE. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU
 
W WINDS AROUND 5 KT. WAVES 1 FT.    
THU NIGHT
 
W WINDS 5 KT. WAVES LESS THAN 1 FT.    
FRI...NE WINDS 5 TO 10 KT
 
BECOMING S. WAVES 1 FT.    
SAT
 
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ534-140800-  
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...NW WINDS AROUND 5 KT
 
BECOMING S LATE. WAVES 1 FT OR LESS.    
TUE NIGHT...S WINDS 10 TO 15 KT
 
BECOMING SW LATE. WAVES 2 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.    
WED NIGHT
 
SW WINDS 10 TO 15 KT. WAVES 2 FT.    
THU...NW WINDS 5 TO 10 KT
 
BECOMING S IN THE AFTERNOON. WAVES  
1 FT.    
THU NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI...N WINDS 5 TO 10 KT
 
BECOMING S. WAVES 1 TO 2 FT.    
SAT
 
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS AND  
TSTMS.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
ANZ543-140800-  
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-  
718 PM EDT MON JUL 13 2026  
   
TONIGHT
 
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE...NW WINDS AROUND 5 KT
 
BECOMING SW LATE. WAVES 1 FT OR LESS.    
TUE NIGHT
 
SW WINDS 10 TO 15 KT. WAVES 1 FT.    
WED
 
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED NIGHT
 
SW WINDS 10 TO 15 KT. WAVES 1 FT.    
THU
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU NIGHT
 
W WINDS 5 TO 10 KT. WAVES 1 FT.    
FRI...NW WINDS 5 TO 10 KT
 
BECOMING S 10 TO 15 KT. WAVES 1 FT.    
SAT
 
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS IN  
THE AFTERNOON. A CHANCE OF SHOWERS AND TSTMS THROUGH THE NIGHT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 

 
 
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