188  
FZUS51 KLWX 122057  
CWFLWX  
 
COASTAL WATERS FORECAST  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
457 PM EDT SUN JUL 12 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.  
 
ANZ500-130800-  
457 PM EDT SUN JUL 12 2026  
 
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...  
 
HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE NORTH THROUGH  
TUESDAY. SPECIAL MARINE WARNINGS OR MARINE WEATHER STATEMENTS MAY BE  
NEEDED FOR STRONG THUNDERSTORMS THIS AFTERNOON INTO THIS EVENING.  
 
 
 
ANZ535-130800-  
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-  
457 PM EDT SUN JUL 12 2026  
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT. WAVES 1 FT. A CHANCE OF  
SHOWERS AND TSTMS.    
TONIGHT  
E WINDS AROUND 5 KT. WAVES 1 FT.    
MON  
E WINDS AROUND 5 KT. WAVES 1 FT.    
MON NIGHT  
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
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.    
THU  
NW WINDS AROUND 5 KT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 
 
 
ANZ536-130800-  
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT  
 
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES  
1 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.   
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT  
BECOMING E  
5 KT LATE. WAVES 1 FT.    
MON  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON NIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
TUE  
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
TUE NIGHT  
SW WINDS AROUND 5 KT. WAVES 1 FT.    
WED  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS AROUND 5 KT. WAVES 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 
 
 
ANZ537-130800-  
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT  
 
   
REST OF THIS AFTERNOON  
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES  
2 FT. A SLIGHT CHANCE OF SHOWERS AND TSTMS.    
TONIGHT  
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.    
MON  
E WINDS 10 KT. WAVES 2 FT.    
MON NIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE  
E WINDS AROUND 5 KT. WAVES FLAT.    
TUE NIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 
 
 
ANZ530-130800-  
CHESAPEAKE BAY NORTH OF POOLES ISLAND-  
457 PM EDT SUN JUL 12 2026  
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT. WAVES 1 FT.    
TONIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
MON  
SE WINDS AROUND 5 KT. WAVES FLAT.    
MON NIGHT  
S WINDS AROUND 5 KT. WAVES FLAT.    
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.    
THU  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
 
 
ANZ531-130800-  
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-  
457 PM EDT SUN JUL 12 2026  
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT. WAVES 1 FT.    
TONIGHT...SE WINDS 10 TO 15 KT  
DIMINISHING TO 5 KT LATE. WAVES  
1 FT.    
MON  
SE WINDS 5 KT. WAVES LESS THAN 1 FT.    
MON NIGHT  
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 1 FT.    
WED  
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS 5 TO 10 KT. WAVES 1 FT.  
 
 
 
ANZ538-130800-  
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-  
457 PM EDT SUN JUL 12 2026  
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT. WAVES 1 FT.    
TONIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
MON  
SE WINDS 5 KT. WAVES LESS THAN 1 FT.    
MON NIGHT  
S WINDS AROUND 5 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  
W WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
 
 
ANZ539-130800-  
CHESTER RIVER TO QUEENSTOWN MD-  
457 PM EDT SUN JUL 12 2026  
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT. WAVES 1 FT.    
TONIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.    
MON  
SE WINDS 5 KT. WAVES FLAT.    
MON NIGHT  
S WINDS AROUND 5 KT. WAVES 1 FT.    
TUE  
SW WINDS AROUND 5 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.    
THU  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
 
 
ANZ532-130800-  
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT  
 
   
REST OF THIS AFTERNOON  
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES  
2 FT.    
TONIGHT  
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO  
2 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
MON NIGHT  
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 1 FT.    
WED  
SW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.    
THU  
NW WINDS 5 TO 10 KT. WAVES 1 FT.  
 
 
 
ANZ540-130800-  
EASTERN BAY-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT  
 
   
REST OF THIS AFTERNOON  
E WINDS 10 KT WITH GUSTS TO 20 KT. WAVES  
1 FT.    
TONIGHT...SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT  
BECOMING E  
5 KT LATE. WAVES 1 FT.    
MON  
SE WINDS 5 KT. WAVES LESS THAN 1 FT.    
MON NIGHT  
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
TUE...LIGHT WINDS  
BECOMING SW 5 TO 10 KT IN THE AFTERNOON. 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.    
THU  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
 
 
ANZ533-130800-  
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT  
 
   
REST OF THIS AFTERNOON  
SE WINDS 15 KT WITH GUSTS TO 20 KT. WAVES  
2 FT.    
TONIGHT  
SE WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO  
2 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
MON NIGHT  
S WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...NW WINDS AROUND 5 KT  
BECOMING S IN THE AFTERNOON. WAVES  
1 FT OR LESS.    
TUE NIGHT  
SW WINDS 10 KT. WAVES 1 FT.    
WED  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS 5 TO 10 KT. WAVES 1 FT.  
 
 
 
ANZ541-130800-  
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT  
 
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES  
1 FT.    
TONIGHT  
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.    
MON  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
MON NIGHT  
SE WINDS 5 TO 10 KT. WAVES 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  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS 5 TO 10 KT. WAVES 1 FT.  
 
 
 
ANZ542-130800-  
PATUXENT RIVER TO BROOMES ISLAND MD-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT UNTIL MIDNIGHT EDT TONIGHT  
 
   
REST OF THIS AFTERNOON  
SE WINDS 10 KT WITH GUSTS TO 20 KT. WAVES  
1 FT. A SLIGHT CHANCE OF SHOWERS AND TSTMS.    
TONIGHT  
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.    
MON  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON NIGHT  
SE WINDS AROUND 5 KT. WAVES 1 FT.    
TUE  
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.    
TUE NIGHT  
SW WINDS 5 KT. WAVES LESS THAN 1 FT.    
WED  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
THU  
NW WINDS 5 KT. WAVES LESS THAN 1 FT.  
 
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.  
 
 
 
ANZ534-130800-  
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT  
 
   
REST OF THIS AFTERNOON  
E WINDS 15 KT WITH GUSTS TO 25 KT. WAVES  
2 FT.    
TONIGHT  
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.    
MON  
E WINDS 10 TO 15 KT. WAVES 2 FT.    
MON NIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.    
TUE  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE NIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED  
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.    
THU...W WINDS 5 TO 10 KT  
BECOMING NW. WAVES 1 FT.  
 
 
 
ANZ543-130800-  
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-  
457 PM EDT SUN JUL 12 2026  
   
..SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT  
 
   
REST OF THIS AFTERNOON  
E WINDS 15 KT WITH GUSTS TO 25 KT. WAVES  
1 FT.    
TONIGHT  
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.    
MON  
E WINDS 5 TO 10 KT. WAVES 1 FT.    
MON NIGHT  
SE WINDS 5 TO 10 KT. WAVES 1 FT.    
TUE...E WINDS AROUND 5 KT  
BECOMING SW IN THE AFTERNOON. WAVES  
1 FT OR LESS.    
TUE NIGHT  
SW WINDS 5 TO 10 KT. WAVES 1 FT.    
WED  
SW WINDS 10 TO 15 KT. WAVES 1 FT.    
THU  
W WINDS 5 TO 10 KT. WAVES 1 FT.  
 
 
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