567
FZUS51 KLWX 310857
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
457 AM EDT FRI JUL 31 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.
ANZ500-312300-
457 AM EDT FRI JUL 31 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
WEAK HIGH PRESSURE WILL SLOWLY BUILD IN FROM THE WEST THROUGH
SATURDAY AS LOW PRESSURE GRADUALLY MOVES AWAY FROM NEW ENGLAND. THE
NEXT LOW PRESSURE SYSTEM WILL APPROACH FROM THE OHIO VALLEY SUNDAY
BEFORE CROSSING WITH A SERIES OF FRONTS EARLY NEXT WEEK. SMALL CRAFT
ADVISORIES MAY BE NEEDED FOR PORTIONS OF THE WATERS AT TIMES FROM
SATURDAY AFTERNOON THROUGH MONDAY.
ANZ535-312300-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
NW WINDS AROUND 5 KT. WAVES 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
SAT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON. WAVES
1 FT.
SAT NIGHT
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ536-312300-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
NW WINDS AROUND 5 KT. WAVES 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY. A CHANCE OF
TSTMS. A CHANCE OF SHOWERS AFTER MIDNIGHT.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ537-312300-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES FLAT.
TODAY
N WINDS AROUND 5 KT. WAVES FLAT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...S WINDS AROUND 5 KT
BECOMING SE 10 TO 15 KT WITH GUSTS TO
20 KT IN THE AFTERNOON. WAVES 1 TO 2 FT.
SAT NIGHT
S WINDS 15 TO 20 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS. A CHANCE OF TSTMS. A
CHANCE OF SHOWERS AFTER MIDNIGHT.
TUE
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS. A CHANCE
OF TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ530-312300-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
NW WINDS AROUND 5 KT. WAVES 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ531-312300-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES FLAT.
TODAY
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF TSTMS.
SHOWERS LIKELY .
TUE
SE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ538-312300-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES FLAT.
TODAY
NE WINDS 5 KT. WAVES FLAT.
TONIGHT
S WINDS AROUND 5 KT. WAVES FLAT.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY. A
CHANCE OF TSTMS THROUGH THE NIGHT.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
AND TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ539-312300-
CHESTER RIVER TO QUEENSTOWN MD-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES FLAT.
TODAY
NW WINDS AROUND 5 KT. WAVES FLAT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 10 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 10 KT. WAVES 1 FT. SHOWERS LIKELY WITH A CHANCE
OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF TSTMS. SHOWERS
LIKELY .
TUE
SE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ532-312300-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES FLAT.
TODAY
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...S WINDS 5 KT
INCREASING TO 10 TO 15 KT WITH GUSTS TO 20 KT
IN THE AFTERNOON. WAVES 1 FT...BUILDING TO 3 FT IN THE AFTERNOON.
SAT NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SUN
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 2 TO 3 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 TO
3 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF TSTMS.
SHOWERS LIKELY .
TUE
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ540-312300-
EASTERN BAY-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES FLAT.
TODAY
NW WINDS AROUND 5 KT. WAVES FLAT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
SAT
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON. WAVES
1 FT OR LESS.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF TSTMS. SHOWERS
LIKELY .
TUE
SE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ533-312300-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES FLAT.
TODAY
N WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...S WINDS 5 KT
BECOMING SE 15 TO 20 KT WITH GUSTS TO 25 KT IN
THE AFTERNOON. WAVES 1 FT...BUILDING TO 3 FT IN THE AFTERNOON.
SAT NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SUN
S WINDS 15 TO 20 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 2 TO 3 FT.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT. A CHANCE OF TSTMS.
SHOWERS.
TUE
SE WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF TSTMS THROUGH
THE NIGHT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ541-312300-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
N WINDS 5 KT. WAVES FLAT.
TODAY
NW WINDS AROUND 5 KT. WAVES 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...S WINDS 5 KT
INCREASING TO 10 TO 15 KT WITH GUSTS TO 20 KT
IN THE AFTERNOON. WAVES 1 TO 2 FT.
SAT NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON...S WINDS 10 TO 15 KT
DIMINISHING TO 5 KT AFTER MIDNIGHT.
WAVES 1 FT. A CHANCE OF TSTMS. SHOWERS LIKELY .
TUE
SE WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF TSTMS
THROUGH THE NIGHT. A CHANCE OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ542-312300-
PATUXENT RIVER TO BROOMES ISLAND MD-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
N WINDS AROUND 5 KT. WAVES 1 FT.
TONIGHT
S WINDS AROUND 5 KT. WAVES 1 FT.
SAT...S WINDS AROUND 5 KT
BECOMING SE 10 TO 15 KT WITH GUSTS TO
20 KT IN THE AFTERNOON. WAVES 1 FT.
SAT NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SUN NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF TSTMS. SHOWERS.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT. A CHANCE OF SHOWERS AND
TSTMS THROUGH THE NIGHT.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ534-312300-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TODAY
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 FT...BUILDING TO 3 FT IN THE AFTERNOON.
SAT NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 TO 3 FT.
SUN NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
SHOWERS LIKELY WITH A CHANCE OF TSTMS.
MON...S WINDS 10 TO 15 KT. WAVES 2 TO 3 FT
SUBSIDING TO 1 FT
AFTER MIDNIGHT. A CHANCE OF TSTMS. SHOWERS.
TUE
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF TSTMS. A CHANCE
OF SHOWERS.
WINDS AND WAVES HIGHER AND VISIBILITIES LOWER IN AND NEAR TSTMS.
ANZ543-312300-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
457 AM EDT FRI JUL 31 2026
REST OF THE OVERNIGHT
NW WINDS 5 KT. WAVES FLAT.
TODAY
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
TONIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
SAT...S WINDS 5 KT
INCREASING TO 10 TO 15 KT WITH GUSTS TO 20 KT
IN THE AFTERNOON. WAVES 1 TO 2 FT.
SAT NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
SUN
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO 2 FT.
SUN NIGHT
S WINDS 15 TO 20 KT. WAVES 2 FT. SHOWERS LIKELY WITH A
CHANCE OF TSTMS.
MON...S WINDS 15 TO 20 KT
BECOMING SW 5 TO 10 KT. WAVES 1 TO
2 FT. SHOWERS LIKELY WITH A CHANCE OF TSTMS.
TUE
S 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.
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