300
FZUS51 KLWX 041157
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
757 AM EDT FRI SEP 4 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.
ANZ500-042000-
757 AM EDT FRI SEP 4 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY
IN A HOT AND HUMID AIR MASS. SPECIAL MARINE WARNINGS MAY BE NEEDED
THIS AFTERNOON FOR STRONG THUNDERSTORMS MOVING OVER THE WATERS.
ANZ535-042000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 TO 10 KT. WAVES 1 FT. A SLIGHT CHANCE OF SHOWERS
AND TSTMS THIS MORNING, THEN SHOWERS LIKELY WITH A CHANCE OF TSTMS
THIS AFTERNOON.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-042000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-042000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS AND TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 2 FT.
MON...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
TUE
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-042000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
WITH A SLIGHT CHANCE OF TSTMS THIS MORNING.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
E WINDS AROUND 5 KT. WAVES FLAT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-042000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
WITH A SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-042000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
WITH A SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A CHANCE OF SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SAT
N WINDS 5 KT. WAVES FLAT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON
SE WINDS AROUND 5 KT. WAVES FLAT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-042000-
CHESTER RIVER TO QUEENSTOWN MD-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
WITH A SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
MON
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-042000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A CHANCE OF SHOWERS AND
TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
NE WINDS 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON...E WINDS 5 KT
BECOMING S. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-042000-
EASTERN BAY-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
WITH A SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A CHANCE OF SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-042000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A CHANCE OF SHOWERS AND
TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
NE WINDS 10 KT. WAVES 2 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
MON...E WINDS 5 TO 10 KT
BECOMING SW AFTER MIDNIGHT. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-042000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS WITH A
SLIGHT CHANCE OF TSTMS THIS MORNING, THEN A CHANCE OF SHOWERS AND
TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT OR
LESS.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-042000-
PATUXENT RIVER TO BROOMES ISLAND MD-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
AND TSTMS THIS AFTERNOON.
TONIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
SAT NIGHT
NE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 5 TO 10 KT. WAVES 1 FT.
MON
E WINDS AROUND 5 KT. WAVES 1 FT.
TUE
SW WINDS AROUND 5 KT. WAVES 1 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-042000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
757 AM EDT FRI SEP 4 2026
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT. A SLIGHT CHANCE OF
SHOWERS AND TSTMS THIS AFTERNOON.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
NE WINDS 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
MON...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
TUE
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-042000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
757 AM EDT FRI SEP 4 2026
TODAY
W WINDS 5 TO 10 KT. WAVES 1 FT.
TONIGHT
W WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT
N WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS.
SAT NIGHT
NE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS
AND TSTMS.
SUN
NE WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
E WINDS 10 TO 15 KT. WAVES 1 FT.
MON...E WINDS 5 TO 10 KT
BECOMING S AFTER MIDNIGHT. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
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