646
FZUS51 KLWX 130858
CWFLWX
COASTAL WATERS FORECAST
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
458 AM EDT MON APR 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.
ANZ500-132300-
458 AM EDT MON APR 13 2026
.SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...
HIGH PRESSURE WILL BUILD TO THE SOUTH WHILE A FRONTAL ZONE REMAINS
OVER THE GREAT LAKES INTO NEW ENGLAND. SMALL CRAFT ADVISORIES MAY BE
NEEDED THIS EVENING AND AT TIMES EACH AFTERNOON TUESDAY THROUGH
THURSDAY.
ANZ535-132300-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD-
458 AM EDT MON APR 13 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH
THIS AFTERNOON...
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 1 FT.
TODAY...SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 1 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT AFTER MIDNIGHT. WAVES 1 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT.
ANZ536-132300-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 1 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
TONIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT EARLY IN THE
EVENING. WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT.
ANZ537-132300-
TIDAL POTOMAC FROM COBB ISLAND TO SMITH POINT-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 2 FT.
TODAY...SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
TONIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT UNTIL EARLY
MORNING. WAVES 1 TO 2 FT.
TUE
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU
SW WINDS 10 TO 15 KT. WAVES 1 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ530-132300-
CHESAPEAKE BAY NORTH OF POOLES ISLAND-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 1 FT.
TODAY...SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 2 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 TO 2 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 20 KT
DIMINISHING
TO 5 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ531-132300-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 2 FT.
TODAY...SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT LATE. WAVES 3 FT...SUBSIDING TO 1 FT AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 TO 2 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ538-132300-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 1 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT AFTER MIDNIGHT. WAVES 1 TO 2 FT.
TUE
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT OR LESS.
TUE NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT OR LESS.
WED
SW WINDS 5 TO 10 KT. WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ539-132300-
CHESTER RIVER TO QUEENSTOWN MD-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT. WAVES 1 FT.
TODAY...SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT
INCREASING TO
30 KT IN THE AFTERNOON. WAVES 2 TO 3 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT LATE. WAVES 1 TO 2 FT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 TO 2 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
NW WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ532-132300-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT. WAVES 2 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
TONIGHT...SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT
DIMINISHING
TO 5 KT LATE. WAVES 3 FT...SUBSIDING TO 1 FT AFTER MIDNIGHT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
WED
S WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON. WAVES
1 TO 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 TO 2 FT.
THU
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI
NW WINDS 5 KT. WAVES LESS THAN 1 FT.
ANZ540-132300-
EASTERN BAY-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT. WAVES 1 FT.
TODAY...SW WINDS 15 KT. GUSTS UP TO 25 KT
INCREASING TO 30 KT IN
THE AFTERNOON. WAVES 2 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT. WAVES 1 TO 2 FT.
TUE
S WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 TO 2 FT.
THU
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ533-132300-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT. WAVES 2 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 3 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT. WAVES 1 TO 2 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
WED NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
THU
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
ANZ541-132300-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT. WAVES 2 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 30 KT. WAVES 2 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT. WAVES 1 TO 2 FT.
TUE
SW WINDS 10 KT. GUSTS UP TO 25 KT IN THE AFTERNOON. WAVES
1 TO 2 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 TO
2 FT.
WED
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
WED NIGHT
SW WINDS 5 TO 10 KT WITH GUSTS TO 20 KT. WAVES 1 FT.
THU
SW WINDS 10 TO 15 KT. WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT OR LESS.
ANZ542-132300-
PATUXENT RIVER TO BROOMES ISLAND MD-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 10 KT. WAVES 1 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 FT.
TONIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
WAVES 1 FT.
TUE
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE AFTERNOON.
WAVES 1 FT.
TUE NIGHT
SW WINDS 5 TO 10 KT. GUSTS UP TO 20 KT IN THE EVENING.
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
SW WINDS 5 TO 10 KT. WAVES 1 FT.
FRI
W WINDS AROUND 5 KT. WAVES 1 FT.
ANZ534-132300-
CHESAPEAKE BAY FROM DRUM POINT TO SMITH POINT-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
3 FT.
TODAY
SW WINDS 10 TO 15 KT WITH GUSTS TO 30 KT. WAVES 3 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT EARLY IN THE
EVENING. WAVES 2 TO 3 FT.
TUE
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE AFTERNOON.
WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 2 TO 3 FT.
WED
S WINDS 5 TO 10 KT WITH GUSTS TO 25 KT. WAVES 2 FT.
WED NIGHT
SW WINDS 10 KT. GUSTS UP TO 25 KT IN THE EVENING. WAVES
2 FT.
THU
SW WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI...SW WINDS 5 TO 10 KT
BECOMING N AFTER MIDNIGHT. WAVES 1 TO
2 FT.
ANZ543-132300-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-
458 AM EDT MON APR 13 2026
..SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS AFTERNOON
REST OF THE OVERNIGHT
S WINDS 15 KT WITH GUSTS TO 20 KT. WAVES
2 FT.
TODAY
SW WINDS 15 TO 20 KT WITH GUSTS TO 30 KT. WAVES 2 TO 3 FT.
TONIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT EARLY IN THE
EVENING. WAVES 1 TO 2 FT.
TUE
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
TUE NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
WED
SW WINDS 10 TO 15 KT WITH GUSTS TO 25 KT. WAVES 1 TO 2 FT.
WED NIGHT
SW WINDS 10 TO 15 KT. GUSTS UP TO 25 KT IN THE EVENING.
WAVES 1 TO 2 FT.
THU
S WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
FRI
W WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
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