485
FZUS51 KLWX 200628
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
228 AM EDT MON APR 20 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.
ANZ500-202000-
228 AM EDT MON APR 20 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
A SECONDARY COLD FRONT WILL PASS THROUGH THIS MORNING. HIGH PRESSURE
WILL BUILD IN LATE TODAY INTO TUESDAY. ANOTHER FRONT LOOKS TO DROP
IN FROM THE NORTH WEDNESDAY. SMALL CRAFT ADVISORIES MAY BE NEEDED
LATE TUESDAY INTO WEDNESDAY IN SOUTH TO SOUTHWEST FLOW.
ANZ535-202000-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF
SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT EARLY IN THE
EVENING. WAVES 1 FT.
TUE
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
SW WINDS 5 KT. WAVES LESS THAN 1 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ536-202000-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SPRINKLES.
MON NIGHT...N WINDS 10 TO 15 KT
DIMINISHING TO 5 KT AFTER
MIDNIGHT. WAVES 1 FT.
TUE
W WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT.
WED
W WINDS 5 TO 10 KT. WAVES 1 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
NE WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ537-202000-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
MON...NW WINDS 10 TO 15 KT
BECOMING 15 KT LATE. GUSTS UP TO
20 KT. WAVES 1 TO 2 FT. A CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED...SW WINDS 10 TO 15 KT
BECOMING W 5 TO 10 KT IN THE
AFTERNOON. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
NE WINDS 5 KT. WAVES LESS THAN 1 FT.
FRI...N WINDS AROUND 5 KT
BECOMING SE. WAVES 1 FT OR LESS. A
CHANCE OF SHOWERS THROUGH THE NIGHT.
ANZ530-202000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
TUE
NW WINDS AROUND 5 KT. WAVES 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ531-202000-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SPRINKLES.
MON NIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NE
5 TO 10 KT LATE. WAVES 1 TO 2 FT.
TUE...NE WINDS AROUND 5 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
SW WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ538-202000-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. A CHANCE OF
SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
TUE
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS. SHOWERS LIKELY.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES FLAT.
THU
W WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ539-202000-
CHESTER RIVER TO QUEENSTOWN MD-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SPRINKLES.
MON NIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE.
WAVES 1 TO 2 FT.
TUE
SE WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
THU
SW WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ532-202000-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
OVERNIGHT
SW WINDS 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT. A
CHANCE OF SPRINKLES.
MON NIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NE
5 TO 10 KT LATE. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF
SHOWERS.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. SHOWERS LIKELY.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
E WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI...NE WINDS 5 KT
BECOMING SE. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS THROUGH THE NIGHT.
ANZ540-202000-
EASTERN BAY-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SPRINKLES.
MON NIGHT...N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
BECOMING NE
5 TO 10 KT LATE. WAVES 1 FT.
TUE
SE WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
TUE NIGHT
S WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT. A CHANCE OF SHOWERS.
WED...SW WINDS 10 TO 15 KT
BECOMING W 5 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU
W WINDS AROUND 5 KT. WAVES FLAT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ533-202000-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
OVERNIGHT
SW WINDS 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON...NW WINDS 10 TO 15 KT
BECOMING 15 KT LATE. GUSTS UP TO
20 KT. WAVES 2 FT. A CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
N WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI...NE WINDS 5 KT
BECOMING SE. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS THROUGH THE NIGHT.
ANZ541-202000-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
OVERNIGHT
S WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SPRINKLES.
MON...NW WINDS 10 TO 15 KT
BECOMING 15 KT LATE. GUSTS UP TO
20 KT. WAVES 2 FT. A CHANCE OF SPRINKLES.
MON NIGHT...N WINDS 10 TO 15 KT
BECOMING NE 5 TO 10 KT LATE.
GUSTS UP TO 20 KT. WAVES 1 TO 2 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING S IN THE AFTERNOON. WAVES
1 FT.
TUE NIGHT
S WINDS 15 TO 20 KT. WAVES 1 TO 2 FT.
WED
SW WINDS 10 TO 15 KT. GUSTS UP TO 20 KT IN THE MORNING. WAVES
1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
FRI...NE WINDS 5 KT
BECOMING SE. WAVES 1 FT OR LESS. A CHANCE OF
SHOWERS THROUGH THE NIGHT.
ANZ542-202000-
PATUXENT RIVER TO BROOMES ISLAND MD-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
THIS EVENING...
OVERNIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT.
MON
NW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 FT. A
CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 5 TO 10 KT. WAVES 1 FT.
TUE
E WINDS 5 KT. WAVES LESS THAN 1 FT.
TUE NIGHT
S WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS AROUND 5 KT. WAVES 1 FT.
THU
NE WINDS AROUND 5 KT. WAVES 1 FT.
FRI
E WINDS 5 KT. WAVES LESS THAN 1 FT. A CHANCE OF SHOWERS
THROUGH THE NIGHT.
ANZ534-202000-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
OVERNIGHT
SW WINDS 10 TO 15 KT. WAVES 1 FT.
MON...W WINDS 10 TO 15 KT
BECOMING NW IN THE AFTERNOON. GUSTS UP
TO 20 KT. WAVES 2 TO 3 FT. A CHANCE OF SPRINKLES.
MON NIGHT
N WINDS 15 TO 20 KT. WAVES 2 TO 3 FT.
TUE...NE WINDS 5 TO 10 KT
BECOMING SE IN THE AFTERNOON. WAVES
1 TO 2 FT.
TUE NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 TO
3 FT.
WED...SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W 5 TO
10 KT IN THE AFTERNOON. WAVES 2 TO 3 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU...N WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT.
FRI...NE WINDS 5 KT
BECOMING SE 10 TO 15 KT. WAVES 1 FT. A CHANCE
OF SHOWERS THROUGH THE NIGHT.
ANZ543-202000-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
228 AM EDT MON APR 20 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM EDT THIS MORNING THROUGH
LATE TONIGHT...
OVERNIGHT...SE WINDS 10 KT
BECOMING S LATE. WAVES 1 FT.
MON...W WINDS 10 TO 15 KT
BECOMING NW IN THE LATE MORNING AND
AFTERNOON. GUSTS UP TO 20 KT. WAVES 1 TO 2 FT. A CHANCE OF
SPRINKLES.
MON NIGHT
N WINDS 10 TO 15 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
TUE...N WINDS 5 TO 10 KT
BECOMING SW IN THE AFTERNOON. WAVES 1 FT
OR LESS.
TUE NIGHT
S WINDS 15 TO 20 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED...SW WINDS 15 TO 20 KT WITH GUSTS TO 25 KT
BECOMING W 5 TO
10 KT IN THE AFTERNOON. WAVES 1 TO 2 FT. A CHANCE OF SHOWERS.
WED NIGHT
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
THU...NW WINDS 5 TO 10 KT
BECOMING S. WAVES 1 FT OR LESS.
FRI...SW WINDS 5 KT
BECOMING SE. WAVES 1 FT.
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